Purolator Premium Plus *Pics*

[1kickbuttranger]

Well, I cut one of these open today. Seems like a solid built filter.

Here is the rear mounted bypass valve that doesn't get much mention here. It looks like it could be a peice of laminate of some sort.

Here is the bad news...

If you push down on it to open the bypass, the valve snags on the metal things that hold the spring and it sticks.

The only way to get it to close is to slam the cartridge on a table firmly. This valve snags if it is pushed straight down, and it happens even worse if it is pushed at an angle.

It would seem that if this were to stick in this position then most or all of the oil would bypass the filter.

It is possible that if oil were in there it may not snag, but it snags pretty tightly.

The type of filter media looks very similar to the Motorcraft, but the Motorcraft media is much thicker.

[ January 12, 2005, 12:30 AM: Message edited by: 1kickbuttranger ]

 

[Ironduke4]

Very interesting! I like purolator oil filters but i don't like what you said about the bypass valve sticking open. What you should do is cut open a used filter and see if the valve is stuck open. If you do post a picture of it.

 

[T-Keith]

Do you have any more pictures or explanation, because I really can't see it.

What application is this? I though most of purolators bypasses were at the threaded end?

No worries from me.

 

[Bryanccfshr]

I wouldn't take the static performance of a bypass valve to seriously. In operation I believe the filter is subject to expansion and contraction from fluid pulses or "slugs" of oil.
Not defending the design if it is indeed faulty but The only way to tell is to look at a used one. It may be that those who engineer oil filters may know what they are doing.

 

[ediamiam]

If you lube the filter/bypass, 'simulating' live conditions, does it still stick ?

 

[TC]

Although I'm currently using PureOnes, this doesn't impress me either. Hoping that lubrication of the valve retainer or expansion from heated oil will solve the issue doesn't give me much of a warm n' fuzzy.

"Are there any oil filters out there with reliable bypass valves?" The unique Wix design looks fairly simple and foolproof, based on photos I've seen.

 

[T-Keith]

quote:

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Originally posted by vvk:
Are there any oil filters out there with reliable bypass valves?

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A reliable bypass vavle included in a $3 part without significantly raising it's price is a hard thing to do. A bypass in the engine is best, I'm not sure why more auto makers don't do it.

 

[jsharp]

quote:

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Originally posted by T-Keith:

quote:

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Originally posted by vvk:
Are there any oil filters out there with reliable bypass valves?

---

A reliable bypass vavle included in a $3 part without significantly raising it's price is a hard thing to do. A bypass in the engine is best, I'm not sure why more auto makers don't do it.

---

I agree with you, but I think we know the answer. Because the automakers want to save the $3...

 

[1kickbuttranger]

T-Keith, here is a clearer picture of how it works - also it was for my application - a FL400s equivalent.

Here it is when the valve is sticking.

I splashed some oil on it and it was better but it still snagged at the top end.

Now, I spun the disc a bit and it seened to be better, (maybe it was out of round a bit)

 

[vvk]

Wow, that is really bad

Are there any oil filters out there with reliable bypass valves?

 

[T-Keith]

Much better pics thanks. It's hard to say if this will be a big deal as we don't know how far the ADBV opens in normal operation, or how it will act in a 50psi oil environment. For those who are worried, I would use the Motorcraft version(if you can find it) which has the bypass valve at the top.

thanks for the correction Michael.

-T

[ January 13, 2005, 09:32 AM: Message edited by: T-Keith ]

 

[Michael Polutta]

You meant "bypass valve," right?

 

[johnnyo4]

quote:

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Originally posted by Ironduke4:
What you should do is cut open a used filter and see if the valve is stuck open. If you do post a picture of it.

---

I've used Purolator Premium Plus filters and cut them open. I never found the bypass stuck open.

 

[GT Mike]

Is it just me, or do the Purolator filters seem to be made of a thinner metal? I installed a PureOne filter today and it seemed awfully flimsy feeling compared to the Wix filters I'm used to using.

I can't remember the part number, but it's the AC PF47 equivilant.

 

[Schmoe]

I'm not sure I'm buying the "slam into the table" trick to get it to open. You have to picture this spring submerged in hot oil and under pressure. Not real life conditions.

 

[TC]

"You have to picture this spring submerged in hot oil and under pressure. Not real life conditions."

True, as in "Innocent until proven guilty." But in this case, two different filter dissecting board members have proven they can stick. That is not in question. What hasn't been proven is that they WON'T stick if hot and/or oily. At this point I'd suggest the burden of proof is on those who say, "Yeah, but I don't think it will stick on an operating engine." The Wix, Fram, Champion clicker, and pre-clicker Champion coil spring bypass valves have all operated just fine when dissected, with no speculation needed as to "Yeah, but it should work OK once it's on an engine..."

 

[Rjettman]

I put a premium plus on my car at the last oil change. Its the first one I have used. I will cut it open when I do my oil change and see what's what. But right now, it only has 1,000 miles on it, so it might be a while.