anti drainback valve question
- Thread starter edwardh1
- Start date
- Status
Originally Posted By: ZeeOSix
Originally Posted By: dickwells
After multiple explanations, there seems to be an unending supply of people who do not understand the function of the adbv in a filter mounted threads up, or sideways.
You must mean "threads down".
I think he does mean filter thread end up, reason being one wouldn't think an adbv would be as important, and that oil would tend to stay in the filter, adbv or not. Think that's the reasoning.
As for the galley v gallery discussion, I'll stay out of that one. Thus, no comments from the peanut 'gallery'.
Originally Posted By: dickwells
After multiple explanations, there seems to be an unending supply of people who do not understand the function of the adbv in a filter mounted threads up, or sideways.
You must mean "threads down".
I think he does mean filter thread end up, reason being one wouldn't think an adbv would be as important, and that oil would tend to stay in the filter, adbv or not. Think that's the reasoning.
As for the galley v gallery discussion, I'll stay out of that one. Thus, no comments from the peanut 'gallery'.
Originally Posted By: ZeeOSix
Originally Posted By: Newtonville
With the GM cars, and many old model cars as well, if they specify no adbv in the filter, it is in the engine.
GM engines do not have an ADBV in the engine, but rather a by-pass valve in the engine block near the filter mount. Two different animals.
I know the bypass and adbv are different, and even know what they are. A GM engine without adbv in filter, originally equipped/spec'd, like I said before, should have a check valve in the engine. If car has filter adbv, it has no need for engine valve. Have seen it explained in a repair manual, and why I conclude it here.
Originally Posted By: Newtonville
With the GM cars, and many old model cars as well, if they specify no adbv in the filter, it is in the engine.
GM engines do not have an ADBV in the engine, but rather a by-pass valve in the engine block near the filter mount. Two different animals.
I know the bypass and adbv are different, and even know what they are. A GM engine without adbv in filter, originally equipped/spec'd, like I said before, should have a check valve in the engine. If car has filter adbv, it has no need for engine valve. Have seen it explained in a repair manual, and why I conclude it here.
- Joined
- Sep 28, 2002
- Messages
- 39,793
Quote:
The valve keeps the oil in the passages above the filter from draining back through the filter.
It may do that. It's original conceptual design is to stop the media from being back flushed vertical mounts typically don't need it for two reasons. One is that the back flow stops when the top is exposed, and anything detached will most likely fall into the bottom of it. On those without ADBV, they also don't have bypass valves (chevy).
Now some engine manufacturers have grown to depend on them. There's no harm in start up rattle ..at least none that bothers any engine designer. They don't stop you from purchasing a nitrile valved filter. They just like to eliminate customer complaints.
I guess at this point it really doesn't matter what anyone thinks the purpose of it is. When a filter man back spec's an OEM design, they merely measure how long the ADBV holds. It doesn't have to do it indefinitely. Nitrile when hot will seal. Nitrile that's been exposed to too many heat cycles will deform when cooled.
My jeep 4.0 doesn't care. It will rattle briefly. My 2.5 won't.
Yeah, the difference between one pass or the next is not really measurable in any practical manner. There would be no reason to fret over oil on one side or the other making its way back to the pan.
Even if you reject the notion that backwashing isn't the primary reason ..and accept that "dirty" oil is allowed back to the pan, it would also have to allow the cleaned oil there too. there's no reason to worry about either the pre-filtered or post filtered oil from making its way back to the pan for he sake of its condition. It's either the same condition it left the pan in ..or better ..if you subscribe to the filter really doing that much on one pass. Out of the millions of cycles a filter sees, unless there was some unicorn of catastrophic failure at that moment, you could eliminate the filter for several cycles and the margin of error on the particle count would carry anything in difference.
The valve keeps the oil in the passages above the filter from draining back through the filter.
It may do that. It's original conceptual design is to stop the media from being back flushed vertical mounts typically don't need it for two reasons. One is that the back flow stops when the top is exposed, and anything detached will most likely fall into the bottom of it. On those without ADBV, they also don't have bypass valves (chevy).
Now some engine manufacturers have grown to depend on them. There's no harm in start up rattle ..at least none that bothers any engine designer. They don't stop you from purchasing a nitrile valved filter. They just like to eliminate customer complaints.
I guess at this point it really doesn't matter what anyone thinks the purpose of it is. When a filter man back spec's an OEM design, they merely measure how long the ADBV holds. It doesn't have to do it indefinitely. Nitrile when hot will seal. Nitrile that's been exposed to too many heat cycles will deform when cooled.
My jeep 4.0 doesn't care. It will rattle briefly. My 2.5 won't.
Yeah, the difference between one pass or the next is not really measurable in any practical manner. There would be no reason to fret over oil on one side or the other making its way back to the pan.
Even if you reject the notion that backwashing isn't the primary reason ..and accept that "dirty" oil is allowed back to the pan, it would also have to allow the cleaned oil there too. there's no reason to worry about either the pre-filtered or post filtered oil from making its way back to the pan for he sake of its condition. It's either the same condition it left the pan in ..or better ..if you subscribe to the filter really doing that much on one pass. Out of the millions of cycles a filter sees, unless there was some unicorn of catastrophic failure at that moment, you could eliminate the filter for several cycles and the margin of error on the particle count would carry anything in difference.
Originally Posted By: Newtonville
I know the bypass and adbv are different, and even know what they are. A GM engine without adbv in filter, originally equipped/spec'd, like I said before, should have a check valve in the engine. If car has filter adbv, it has no need for engine valve. Have seen it explained in a repair manual, and why I conclude it here.
I would say the manual you read is dead wrong. It wouldn't be the first time a repair manual was totally out to lunch. I'd also ask for your source. GM often uses bypass valves in the engine, rather than the filter.
Considering the way the ADBV works and its purpose, I would suggest that it would technically be possible to put it in the engine, but it would be a logistical and maintenance nightmare. For proper sealing, one would need to use something like nitrile or silicone (i.e. what's in filter ADBVs). Those things have a rather short service life, and having it in the engine would be a nightmare for maintenance, which would increase maintenance costs or simply be neglected.
The old Chevy small blocks, for instance, had no use for an ADBV. The filter was thread side up. Unless you parked the car upside down, the oil could not drain out of the filter. If the oil cannot DRAIN BACK from the filter, the anti-DRAIN BACK valve is redundant.
The thread up filters are the way to go, from a design perspective. No ADBV means one less part, which means one less potential for failure, and also one less item to cost money. Oil follows the laws of gravity, so instead of devising something to fight gravity, simply let it be your friend and do the job for you.
I know the bypass and adbv are different, and even know what they are. A GM engine without adbv in filter, originally equipped/spec'd, like I said before, should have a check valve in the engine. If car has filter adbv, it has no need for engine valve. Have seen it explained in a repair manual, and why I conclude it here.
I would say the manual you read is dead wrong. It wouldn't be the first time a repair manual was totally out to lunch. I'd also ask for your source. GM often uses bypass valves in the engine, rather than the filter.
Considering the way the ADBV works and its purpose, I would suggest that it would technically be possible to put it in the engine, but it would be a logistical and maintenance nightmare. For proper sealing, one would need to use something like nitrile or silicone (i.e. what's in filter ADBVs). Those things have a rather short service life, and having it in the engine would be a nightmare for maintenance, which would increase maintenance costs or simply be neglected.
The old Chevy small blocks, for instance, had no use for an ADBV. The filter was thread side up. Unless you parked the car upside down, the oil could not drain out of the filter. If the oil cannot DRAIN BACK from the filter, the anti-DRAIN BACK valve is redundant.
The thread up filters are the way to go, from a design perspective. No ADBV means one less part, which means one less potential for failure, and also one less item to cost money. Oil follows the laws of gravity, so instead of devising something to fight gravity, simply let it be your friend and do the job for you.
Originally Posted By: Garak
Originally Posted By: Newtonville
I know the bypass and adbv are different, and even know what they are. A GM engine without adbv in filter, originally equipped/spec'd, like I said before, should have a check valve in the engine. If car has filter adbv, it has no need for engine valve. Have seen it explained in a repair manual, and why I conclude it here.
I would say the manual you read is dead wrong. It wouldn't be the first time a repair manual was totally out to lunch. I'd also ask for your source. GM often uses bypass valves in the engine, rather than the filter.
Considering the way the ADBV works and its purpose, I would suggest that it would technically be possible to put it in the engine, but it would be a logistical and maintenance nightmare. For proper sealing, one would need to use something like nitrile or silicone (i.e. what's in filter ADBVs). Those things have a rather short service life, and having it in the engine would be a nightmare for maintenance, which would increase maintenance costs or simply be neglected.
The old Chevy small blocks, for instance, had no use for an ADBV. The filter was thread side up. Unless you parked the car upside down, the oil could not drain out of the filter. If the oil cannot DRAIN BACK from the filter, the anti-DRAIN BACK valve is redundant.
The thread up filters are the way to go, from a design perspective. No ADBV means one less part, which means one less potential for failure, and also one less item to cost money. Oil follows the laws of gravity, so instead of devising something to fight gravity, simply let it be your friend and do the job for you.
>
Stockel is author, auto repair textbook, and it's correct. Check valves don't need to be rubber. There have been lots of explanations above, a lot of time spent, apparently wasted time. Chev isn't the only make with thread up. Ford Toyota many others have it on very common models, with adbvs. Various makes have/had no bypass valve in filter but in engine.
Originally Posted By: Newtonville
I know the bypass and adbv are different, and even know what they are. A GM engine without adbv in filter, originally equipped/spec'd, like I said before, should have a check valve in the engine. If car has filter adbv, it has no need for engine valve. Have seen it explained in a repair manual, and why I conclude it here.
I would say the manual you read is dead wrong. It wouldn't be the first time a repair manual was totally out to lunch. I'd also ask for your source. GM often uses bypass valves in the engine, rather than the filter.
Considering the way the ADBV works and its purpose, I would suggest that it would technically be possible to put it in the engine, but it would be a logistical and maintenance nightmare. For proper sealing, one would need to use something like nitrile or silicone (i.e. what's in filter ADBVs). Those things have a rather short service life, and having it in the engine would be a nightmare for maintenance, which would increase maintenance costs or simply be neglected.
The old Chevy small blocks, for instance, had no use for an ADBV. The filter was thread side up. Unless you parked the car upside down, the oil could not drain out of the filter. If the oil cannot DRAIN BACK from the filter, the anti-DRAIN BACK valve is redundant.
The thread up filters are the way to go, from a design perspective. No ADBV means one less part, which means one less potential for failure, and also one less item to cost money. Oil follows the laws of gravity, so instead of devising something to fight gravity, simply let it be your friend and do the job for you.
>
Stockel is author, auto repair textbook, and it's correct. Check valves don't need to be rubber. There have been lots of explanations above, a lot of time spent, apparently wasted time. Chev isn't the only make with thread up. Ford Toyota many others have it on very common models, with adbvs. Various makes have/had no bypass valve in filter but in engine.
Originally Posted By: Newtonville
Originally Posted By: ZeeOSix
Originally Posted By: Newtonville
With the GM cars, and many old model cars as well, if they specify no adbv in the filter, it is in the engine.
GM engines do not have an ADBV in the engine, but rather a by-pass valve in the engine block near the filter mount. Two different animals.
I know the bypass and adbv are different, and even know what they are. A GM engine without adbv in filter, originally equipped/spec'd, like I said before, should have a check valve in the engine. If car has filter adbv, it has no need for engine valve. Have seen it explained in a repair manual, and why I conclude it here.
The only "check valve" in a GM engine is the filter by-pass valve. There is NO ADBV built into the engine.
Originally Posted By: ZeeOSix
Originally Posted By: Newtonville
With the GM cars, and many old model cars as well, if they specify no adbv in the filter, it is in the engine.
GM engines do not have an ADBV in the engine, but rather a by-pass valve in the engine block near the filter mount. Two different animals.
I know the bypass and adbv are different, and even know what they are. A GM engine without adbv in filter, originally equipped/spec'd, like I said before, should have a check valve in the engine. If car has filter adbv, it has no need for engine valve. Have seen it explained in a repair manual, and why I conclude it here.
The only "check valve" in a GM engine is the filter by-pass valve. There is NO ADBV built into the engine.
Originally Posted By: ZeeOSix
It's oil gallery, not oil galley.
http://www.merriam-webster.com/dictionary/galley
http://www.merriam-webster.com/dictionary/gallery
Gallery is where they show paintings and things like that. That's my story and I'm sticking to it. Try a Google search using "Galley". Well after reading more it looks like I could be wrong or right?
It's oil gallery, not oil galley.
http://www.merriam-webster.com/dictionary/galley
http://www.merriam-webster.com/dictionary/gallery
Gallery is where they show paintings and things like that. That's my story and I'm sticking to it. Try a Google search using "Galley". Well after reading more it looks like I could be wrong or right?
Last edited:
Originally Posted By: Newtonville
>
Stockel is author, auto repair textbook, and it's correct. Check valves don't need to be rubber. There have been lots of explanations above, a lot of time spent, apparently wasted time. Chev isn't the only make with thread up. Ford Toyota many others have it on very common models, with adbvs. Various makes have/had no bypass valve in filter but in engine.
Yes, oil is above the filter, certainly above the filter casing; below it would not be good, unless you like a messy floor. Gravity does work that way. And what's a "check valve?" There are bypass valves in the Chevy engines, not anti-drainback valves. They are not the same thing, and absolutely do not have the same purpose.
A thread side up filter has no need for an ADBV. A GM may have the bypass valve in the engine, and none in the filter. One could have a filter without an ADBV and without a bypass valve, or only one of the two, or both.
Check the specs on the Motorcraft FL1A or the Wix 51515. They both have thread end bypass valves. The FL1A has a nitrile ADBV. The Wix has a silicone ADBV. The bybass and ADBV are completely different animals with completely different purposes and completely different designs.
How would you design an anti-drainback valve that would keep the oil in place for a certain period of time, yet be installed in the engine and survive the life of the engine?
Realistically, there is rarely a NEED for an ADBV. They are simply nice to have. When I started working on vehicles, they were only available on expensive filters and for certain applications. The original canister filters for Chev small blocks simply didn't have ADBVs because they were redundant. That has nothing to do with the functioning or location of a bypass valve.
The bypass valve is meant to ensure you have oil flow even when the oil is cold or when the filter is clogged to the point it won't flow anymore. The ADBV is to prevent sensitive ears from hearing ticking at startup that may or may not be a problem in the real world.
>
Stockel is author, auto repair textbook, and it's correct. Check valves don't need to be rubber. There have been lots of explanations above, a lot of time spent, apparently wasted time. Chev isn't the only make with thread up. Ford Toyota many others have it on very common models, with adbvs. Various makes have/had no bypass valve in filter but in engine.
Yes, oil is above the filter, certainly above the filter casing; below it would not be good, unless you like a messy floor. Gravity does work that way. And what's a "check valve?" There are bypass valves in the Chevy engines, not anti-drainback valves. They are not the same thing, and absolutely do not have the same purpose.
A thread side up filter has no need for an ADBV. A GM may have the bypass valve in the engine, and none in the filter. One could have a filter without an ADBV and without a bypass valve, or only one of the two, or both.
Check the specs on the Motorcraft FL1A or the Wix 51515. They both have thread end bypass valves. The FL1A has a nitrile ADBV. The Wix has a silicone ADBV. The bybass and ADBV are completely different animals with completely different purposes and completely different designs.
How would you design an anti-drainback valve that would keep the oil in place for a certain period of time, yet be installed in the engine and survive the life of the engine?
Realistically, there is rarely a NEED for an ADBV. They are simply nice to have. When I started working on vehicles, they were only available on expensive filters and for certain applications. The original canister filters for Chev small blocks simply didn't have ADBVs because they were redundant. That has nothing to do with the functioning or location of a bypass valve.
The bypass valve is meant to ensure you have oil flow even when the oil is cold or when the filter is clogged to the point it won't flow anymore. The ADBV is to prevent sensitive ears from hearing ticking at startup that may or may not be a problem in the real world.
Originally Posted By: oilboy123
Originally Posted By: ZeeOSix
It's oil gallery, not oil galley.
http://www.merriam-webster.com/dictionary/galley
http://www.merriam-webster.com/dictionary/gallery
Gallery is where they show paintings and things like that. That's my story and I'm sticking to it. Try a Google search using "Galley". Well after reading more it looks like I could be wrong or right?
Guess you didn't read the links I posted. It's pretty clear what the two words mean ... and "oil gallery" is the correct terminology.
http://www.cardictionary.com/definition/oil-gallery.html
Originally Posted By: ZeeOSix
It's oil gallery, not oil galley.
http://www.merriam-webster.com/dictionary/galley
http://www.merriam-webster.com/dictionary/gallery
Gallery is where they show paintings and things like that. That's my story and I'm sticking to it. Try a Google search using "Galley". Well after reading more it looks like I could be wrong or right?
Guess you didn't read the links I posted. It's pretty clear what the two words mean ... and "oil gallery" is the correct terminology.
http://www.cardictionary.com/definition/oil-gallery.html
Originally Posted By: ZeeOSix
Originally Posted By: Newtonville
Originally Posted By: ZeeOSix
Originally Posted By: Newtonville
With the GM cars, and many old model cars as well, if they specify no adbv in the filter, it is in the engine.
GM engines do not have an ADBV in the engine, but rather a by-pass valve in the engine block near the filter mount. Two different animals.
I know the bypass and adbv are different, and even know what they are. A GM engine without adbv in filter, originally equipped/spec'd, like I said before, should have a check valve in the engine. If car has filter adbv, it has no need for engine valve. Have seen it explained in a repair manual, and why I conclude it here.
The only "check valve" in a GM engine is the filter by-pass valve. There is NO ADBV built into the engine.
Your source? You ask for one, then ignore. Read Stockel,search. Check valves exist, you think so or not. In five minutes of searching, I found several references to GM check valves in the engine. A rebuilder says two little known oil check valves. Another the same, even a reference to problems when the check valve ball failed, oil wouldn't stay up in the engine, and they designed a new one.
For one thing, it "should", like I said, have a check valve. GM makes/made thousands of types of engines. No one has taken apart every variation.
The topic was about the threads up filter not needing an adbv, not every GM engine made. It isn't so simple as a can sitting on a table and the oil don't go out. It doesn't have to have a valve, nor a filter either, but it's BETTER, because there is oil held above the filter.
Originally Posted By: Newtonville
Originally Posted By: ZeeOSix
Originally Posted By: Newtonville
With the GM cars, and many old model cars as well, if they specify no adbv in the filter, it is in the engine.
GM engines do not have an ADBV in the engine, but rather a by-pass valve in the engine block near the filter mount. Two different animals.
I know the bypass and adbv are different, and even know what they are. A GM engine without adbv in filter, originally equipped/spec'd, like I said before, should have a check valve in the engine. If car has filter adbv, it has no need for engine valve. Have seen it explained in a repair manual, and why I conclude it here.
The only "check valve" in a GM engine is the filter by-pass valve. There is NO ADBV built into the engine.
Your source? You ask for one, then ignore. Read Stockel,search. Check valves exist, you think so or not. In five minutes of searching, I found several references to GM check valves in the engine. A rebuilder says two little known oil check valves. Another the same, even a reference to problems when the check valve ball failed, oil wouldn't stay up in the engine, and they designed a new one.
For one thing, it "should", like I said, have a check valve. GM makes/made thousands of types of engines. No one has taken apart every variation.
The topic was about the threads up filter not needing an adbv, not every GM engine made. It isn't so simple as a can sitting on a table and the oil don't go out. It doesn't have to have a valve, nor a filter either, but it's BETTER, because there is oil held above the filter.
Originally Posted By: Newtonville
Originally Posted By: ZeeOSix
The only "check valve" in a GM engine is the filter by-pass valve. There is NO ADBV built into the engine.
Your source? You ask for one, then ignore.
You must have me confused with someone else in this tread ... I never asked you for "your source". If you're so confident that there is some secret "ADBV check valve" in GM blocks, then link up the info.
Originally Posted By: ZeeOSix
The only "check valve" in a GM engine is the filter by-pass valve. There is NO ADBV built into the engine.
Your source? You ask for one, then ignore.
You must have me confused with someone else in this tread ... I never asked you for "your source". If you're so confident that there is some secret "ADBV check valve" in GM blocks, then link up the info.
Originally Posted By: Newtonville
For one thing, it "should", like I said, have a check valve. GM makes/made thousands of types of engines. No one has taken apart every variation.
Again, define "check valve." The valves in General Motors engines that have anything to do with the pumping of oil through (or past) an oil filter are the internal bypass valves. Check the specifications on AC Delco filters, or any that are specified for such GM engines.
It is not there to hold oil anywhere. It is there to ensure that oil flows even when the filter is clogged. The bypass valve in the GM engines predates the common use of anti-drainback valves. An internal bypass valve also does not preclude the value of an ADBV in a horizontally mounted or upside down filter.
Here's a perfect example from a Ford application. Compare the Motorcraft FL1A, the Motorcraft CFL1, and the Wix 51515. The FL1A has a thread end bypass valve and a nitrile ADBV. The CFL1 (no longer produced) had a thread end bypass valve with no ADBV whatsoever. The Wix 51515 has a thread end bypass valve and a silicone ADBV. All three filters are specified for the exact same engines and have the same bypass settings, regardless of the construction or absence of any ADBV.
In the days before the ADBV became fashionable, the CFL1 was the standard Ford filter. The FL1A was marketed as a long life filter. As ADBVs became more fashionable, the CFL1 was simply discontinued.
A bypass valve is an essential component for engine longevity. If the oil cannot go through the media because the oil is too thick or the media is clogged, the engine is going to have problems. An ADBV is not essential, but may have some effect on engine life, and, more importantly, is a nice-to-have feature to minimize startup noise.
Engines can fail due to a faulty bypass valve. I've never heard of an engine failing due to the lack of an ADBV.
For one thing, it "should", like I said, have a check valve. GM makes/made thousands of types of engines. No one has taken apart every variation.
Again, define "check valve." The valves in General Motors engines that have anything to do with the pumping of oil through (or past) an oil filter are the internal bypass valves. Check the specifications on AC Delco filters, or any that are specified for such GM engines.
It is not there to hold oil anywhere. It is there to ensure that oil flows even when the filter is clogged. The bypass valve in the GM engines predates the common use of anti-drainback valves. An internal bypass valve also does not preclude the value of an ADBV in a horizontally mounted or upside down filter.
Here's a perfect example from a Ford application. Compare the Motorcraft FL1A, the Motorcraft CFL1, and the Wix 51515. The FL1A has a thread end bypass valve and a nitrile ADBV. The CFL1 (no longer produced) had a thread end bypass valve with no ADBV whatsoever. The Wix 51515 has a thread end bypass valve and a silicone ADBV. All three filters are specified for the exact same engines and have the same bypass settings, regardless of the construction or absence of any ADBV.
In the days before the ADBV became fashionable, the CFL1 was the standard Ford filter. The FL1A was marketed as a long life filter. As ADBVs became more fashionable, the CFL1 was simply discontinued.
A bypass valve is an essential component for engine longevity. If the oil cannot go through the media because the oil is too thick or the media is clogged, the engine is going to have problems. An ADBV is not essential, but may have some effect on engine life, and, more importantly, is a nice-to-have feature to minimize startup noise.
Engines can fail due to a faulty bypass valve. I've never heard of an engine failing due to the lack of an ADBV.
I'm just adding my
and experience/comfort level. In both my 4.9L inline six ford truck engines I used a certain orange can filter. It had a black Nitrile ADBV. It caused the engine to have dry oil starts right from the beginning. For years I blamed the oil. One day I decided to use the equivalent Motorcraft Filter, it also has a black nitrile ADBV, no more start up noise, using the same brand/grade oil. This filter was horizontal on the engine. My 1996 2.0L Zetec is also horizontal and "suffered" from dry start noises with the orange can nitrile filter, less than the truck though. I changed to the silicon ADBV FL200S and it is totally quiet on start up now.
Now I extend my OCI's I'm using silicon ADBV on all my vehicles.
Whimsey
Now I extend my OCI's I'm using silicon ADBV on all my vehicles.
Whimsey
Originally Posted By: Whimsey
In both my 4.9L inline six ford truck engines I used a certain orange can filter. It had a black Nitrile ADBV. It caused the engine to have dry oil starts right from the beginning. For years I blamed the oil. One day I decided to use the equivalent Motorcraft Filter, it also has a black nitrile ADBV, no more start up noise, using the same brand/grade oil.
That reflects my experience with my old 2.3L Ford. When using the CFL1 or other filters without the ADBV (I believe Wix had filters without ADBVs way back then), there was the noise, and changing the oil made a giant mess. If I used the FL1A or the AC Delcos with the ADBVs, the noise disappeared and oil changes were quite a bit neater.
In both my 4.9L inline six ford truck engines I used a certain orange can filter. It had a black Nitrile ADBV. It caused the engine to have dry oil starts right from the beginning. For years I blamed the oil. One day I decided to use the equivalent Motorcraft Filter, it also has a black nitrile ADBV, no more start up noise, using the same brand/grade oil.
That reflects my experience with my old 2.3L Ford. When using the CFL1 or other filters without the ADBV (I believe Wix had filters without ADBVs way back then), there was the noise, and changing the oil made a giant mess. If I used the FL1A or the AC Delcos with the ADBVs, the noise disappeared and oil changes were quite a bit neater.
Originally Posted By: ZeeOSix
Originally Posted By: Newtonville
Originally Posted By: ZeeOSix
The only "check valve" in a GM engine is the filter by-pass valve. There is NO ADBV built into the engine.
Your source? You ask for one, then ignore.
You must have me confused with someone else in this tread ... I never asked you for "your source". If you're so confident that there is some secret "ADBV check valve" in GM blocks, then link up the info.
Sorry, it was someone else, my mistake on mixing your handle with someone else, given all the quoting upon quoting.
Originally Posted By: Newtonville
Originally Posted By: ZeeOSix
The only "check valve" in a GM engine is the filter by-pass valve. There is NO ADBV built into the engine.
Your source? You ask for one, then ignore.
You must have me confused with someone else in this tread ... I never asked you for "your source". If you're so confident that there is some secret "ADBV check valve" in GM blocks, then link up the info.
Sorry, it was someone else, my mistake on mixing your handle with someone else, given all the quoting upon quoting.
it keeps the filter "primed" so the engine will have less of a dry start... Also it keeps the filtered oil from mixing with the unfiltered oil
Motorcraft filters work well
there is in some of them
engine design with the filters with the threads on top is my choice
- Status
Similar threads
