Do I Need a Catch Can!
- Thread starter Gebo
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The 2.5L V6 - 4GR-FSE engine uses the D4 injection system which is PFI/GDI so it shouldn't require a catch can.
I have the 3.5 Litre version (2GR-FKS) equipped with the same injection system D4-S on my Highlander.
As the Port injection isn't used most of the time I would use a quality PEA based fuel system cleaner regularly to aid it cleaning the valves when it is in use, also to keep the direct injection injectors clean because they see a lot of heat being directly in the combustion chamber.
I have the 3.5 Litre version (2GR-FKS) equipped with the same injection system D4-S on my Highlander.
As the Port injection isn't used most of the time I would use a quality PEA based fuel system cleaner regularly to aid it cleaning the valves when it is in use, also to keep the direct injection injectors clean because they see a lot of heat being directly in the combustion chamber.
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I would advocate for one on a D.I. engine without the PFI duel system. I would run the hose down from the PCV to the can with some sort of baffling and then back up again. This down then up makes it hard for oil to enter the engine and also gives it time to condense on it's way to the can. I wouldn't mind trying a couple see through gas filters, spin-on oil filter as a catch can or even a Frantz bypass filter as the catch can and see what works best.
That said I'm happy I have the dual injection setup and don't need to worry about this.
A Mini or certain Volkswagens would be great test candidates.
That said I'm happy I have the dual injection setup and don't need to worry about this.
A Mini or certain Volkswagens would be great test candidates.
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Or put it on and take it off when you visit the dealer. Just do it in a way that there is no permanent damage to hoses etc.
Needed? If you put one on a vehicle and every few thousand miles you looked at a couple of shot glasses full of La brae tar pit gunk that drained ...every molecule of your being would be screaming HOORAY! it's out of my engine! But if you like to sit in an armchair and postulate that the engineers are way smarter than the rest of us you can just pretend it doesn't exist and so not needed by anyone. Mine has been to the dealer a few times nary a word about it. Of course don't buy a $20 one on eBay either,
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Originally Posted by RamFan
Not to cause controversy, but is a catch can ever truly needed on a stock vehicle?
Since multiple millions of engines with oil vapor in their PCV tracts run fine without one the answer is obvious...
Not to cause controversy, but is a catch can ever truly needed on a stock vehicle?
Since multiple millions of engines with oil vapor in their PCV tracts run fine without one the answer is obvious...
A catch can seems like a product someone would use if they can't make it to the restroom on time.
I know people are using them on direct injection engines since the gas vapor is not flowing over the intact valves and washing the PCV crud off of them. My understanding is the engineers behind these DI engine designs have since seen the errors of their ways. So to fix the problems they designed into our engines we need catch cans. Does that about sum it up?
I've used a catch-can on a couple of cars ... they always collect some oil, so what it collects isn't going into the intake manifold. Even if it's an ounce every 1000 miles during mellow driving conditions it's still preventing some oil from getting into the intake manifold.
GM uses a factory oil vapor "catch can" on their performance oriented DI V8's, It drains the captured oil back into the oil pan.
Originally Posted by Kawiguy454
Needed? If you put one on a vehicle and every few thousand miles you looked at a couple of shot glasses full of La brae tar pit gunk that drained ...every molecule of your being would be screaming HOORAY! it's out of my engine! But if you like to sit in an armchair and postulate that the engineers are way smarter than the rest of us you can just pretend it doesn't exist and so not needed by anyone. Mine has been to the dealer a few times nary a word about it. Of course don't buy a $20 one on eBay either,
The engineers (who work for the car makers) are smarter than most on here who are arm chair engineers. You know-the same guys who don't have any use for social media........on this forum.
There are many cars-raking up millions of miles without catch cans.
Needed? If you put one on a vehicle and every few thousand miles you looked at a couple of shot glasses full of La brae tar pit gunk that drained ...every molecule of your being would be screaming HOORAY! it's out of my engine! But if you like to sit in an armchair and postulate that the engineers are way smarter than the rest of us you can just pretend it doesn't exist and so not needed by anyone. Mine has been to the dealer a few times nary a word about it. Of course don't buy a $20 one on eBay either,
The engineers (who work for the car makers) are smarter than most on here who are arm chair engineers. You know-the same guys who don't have any use for social media........on this forum.
There are many cars-raking up millions of miles without catch cans.
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Car makers don't put a catch-can on cars because they know most people are too lazy and/or unable to maintain it.
Ford makes a catch-can for the Mustang as an aftermarket piece. Guess those Ford performance engineers know something about it.
Ford makes a catch-can for the Mustang as an aftermarket piece. Guess those Ford performance engineers know something about it.
Originally Posted by ZeeOSix
Car makers don't put a catch-can on cars because they know most people are too lazy and/or unable to maintain it.
Ford makes a catch-can for the Mustang as an aftermarket piece. Guess those Ford performance engineers know something about it.
They know what people want to buy, and that some of them value a part that won't void warranty. It's a marketable item - that it is sold is frankly irrelevant to wether it works or not. At best, it means it won't negatively affect the car.
Car makers don't put a catch-can on cars because they know most people are too lazy and/or unable to maintain it.
Ford makes a catch-can for the Mustang as an aftermarket piece. Guess those Ford performance engineers know something about it.
They know what people want to buy, and that some of them value a part that won't void warranty. It's a marketable item - that it is sold is frankly irrelevant to wether it works or not. At best, it means it won't negatively affect the car.
Originally Posted by ZeeOSix
Car makers don't put a catch-can on cars because they know most people are too lazy and/or unable to maintain it.
I'm not convinced of their necessity, but they do scratch an OCD itch, so I see the value there. However, no matter how much they help, I agree with your point. People can't check their own tire pressure without a warning lamp going off, much less empty a catch can.
Car makers don't put a catch-can on cars because they know most people are too lazy and/or unable to maintain it.
I'm not convinced of their necessity, but they do scratch an OCD itch, so I see the value there. However, no matter how much they help, I agree with your point. People can't check their own tire pressure without a warning lamp going off, much less empty a catch can.
Originally Posted by ZeeOSix
Car makers don't put a catch-can on cars because they know most people are too lazy and/or unable to maintain it.
Volvo put a catch can on their engines. You can't even see it, let alone maintain it. So it later becomes a problem. It's not that big a job, seeing as these days even just changing sparkplugs can turn into hours of work, but no workshop is going to do it as part of a service, and owners are not going to do it themselves. A good idea lost from engineer to designer.
Car makers don't put a catch-can on cars because they know most people are too lazy and/or unable to maintain it.
Volvo put a catch can on their engines. You can't even see it, let alone maintain it. So it later becomes a problem. It's not that big a job, seeing as these days even just changing sparkplugs can turn into hours of work, but no workshop is going to do it as part of a service, and owners are not going to do it themselves. A good idea lost from engineer to designer.
Just put one on without damaging anything on the car in the process and take it off if you ever have to take the car in. We are talking 2 hoses, piece of cake to remove/reinstall.
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