[Xaxas]

Originally Posted by 2SS Capt

You're right, there is no "valve cooking" issue, but over the long term there may be a valve coking issue, which is what we are discussing here...

I’m spending too much time sitting, guess I better stand up and grab some sweet desert to help focus.

[2SS Capt]

Originally Posted by Xaxas

I’m spending too much time sitting, guess I better stand up and grab some sweet desert to help focus.

Be careful, the desert can be hot and you might get dehydrated, you'd be better off to get some nice cold ice cream for dessert instead of heading for the desert!

[UnknownJinX]

Originally Posted by 2SS Capt

Port Injected engines have fuel washing over the intake valves (which can dissolve and clean the deposits), so that is actually a VERY big difference from our Direct Injection engines.

To be clear, I am talking about once the mixture enters the combustion chamber. The valve coking has already been addressed with various pictures of people's engines, so make your own judgment there.

After the mixture enters the combustion chamber, it's about the deposit left on the piston, around the piston(the compression rings and oil control ring), and the exhaust system, namely the narrowband O2 sensors and the catalytic converters. That's where I think PI and DI would be pretty similar without a catch can.

One thing that may be different is the oil quality, but that's pretty easy to determine with a UOA or just a quick sniff of the oil dipstick to see if there is too much gas and other junk in the oil.

Originally Posted by Xaxas

I think the word here is "nuance" and not "empathy".

Buddy I've already stated that valve cooking is not an issue, I've literally answered your question 2 or 3 times already, the question is not if there is valve cooking or not, it's not an absolute, there is no valve cooking issue, I REPEAT, THERE IS NO VALVE COOKING ISSUE, this is your own statement and me and others agree to it; it's not a white and black argument of is there/there isn't, it's a nuanced argument that IT HELPS and HOW MUCH, this is the point I'm trying to get across, you don't lack empathy because your argument is never combative and dismissive, but you fail to understand what we're trying to communicate and still say "but there's no valve cooking issue", which is why you still hang on to it and can't see past that to what we're trying to say.

So for the people who moved on from valve coking, what other aspects do a catch can help?

Originally Posted by Xaxas

This is sadly the case with most people and ultimately shows in the country, "my side" and "the other side(s)", there is never an in-between, there is never nuance and people can't look past the fence that divides, polarization is the bane of discussions.

But with a catch can, there isn't really a middle ground, other than just understanding where the other side is coming from.

You either buy and install one or you don't. The EV issue is different since hybrids and/or owning multiple cars with different propulsion techs are in-between solutions. It's not like you can just buy a catch can and attach half of the hoses, LOL.

[2SS Capt]

Originally Posted by UnknownJinX

To be clear, I am talking about once the mixture enters the combustion chamber. The valve coking has already been addressed with various pictures of people's engines, so make your own judgment there.

After the mixture enters the combustion chamber, it's about the deposit left on the piston, around the piston(the compression rings and oil control ring), and the exhaust system, namely the narrowband O2 sensors and the catalytic converters. That's where I think PI and DI would be pretty similar without a catch can.

One thing that may be different is the oil quality, but that's pretty easy to determine with a UOA or just a quick sniff of the oil dipstick to see if there is too much gas and other junk in the oil.



So for the people who moved on from valve coking, what other aspects do a catch can help?



But with a catch can, there isn't really a middle ground, other than just understanding where the other side is coming from.

You either buy and install one or you don't. The EV issue is different since hybrids and/or owning multiple cars with different propulsion techs are in-between solutions. It's not like you can just buy a catch can and attach half of the hoses, LOL.

I think the main issue that a catch can is trying to address is keeping oil and other crap out of the intake and off the valves (reduce valve coking), this much more so than out of the combustion chamber and beyond,,,

[Aragorn]

About 1000 miles worth.

[Xaxas]

Originally Posted by Aragorn

About 1000 miles worth.
Attachment 1088114

Haters will say that it has no sugar therefore it ain't bad

[wavsine]

Originally Posted by Devstrike

I can't remember if was in a facebook group or here but I remember someone with well over 100k miles took apart their motor and he didn't have a catch can. Everything looked not bad at all I was considering one but after seeing that I decided not too.

You have to know the back story of the guys car to know. Running at high revs on the highway (Italian tuneup) and using low NOACK synthetic oil can help cut down on intake valve carbon deposits.

I would not run a catch can on a GM vehicle that is still under warranty. They might say the can caused an engine problem even if it did not.

[Memphis SS]

Originally Posted by wavsine

You have to know the back story of the guys car to know. Running at high revs on the highway (Italian tuneup) and using low NOACK synthetic oil can help cut down on intake valve carbon deposits.

I would not run a catch can on a GM vehicle that is still under warranty. They might say the can caused an engine problem even if it did not.

I agree… I’ve been told by three local dealers they would not cover engine issues if I had a catch can installed.

Before someone goes down the road of they can’t do that because of blah blah blah law. You’re going to have to foot the bill on the repair while you spend money on an attorney to fight it or let the car sit on the lot broke while you spend money on legal fees to force the repair, it’s not worth it to me. I will pass on the catch can.

[Aragorn]

Originally Posted by Xaxas

Haters will say that it has no sugar therefore it ain't bad

[Dave777]

If you believe in catch cans buy and install it.

If you don’t believe in a catch can don’t buy one.

[Altered Carbon]

Originally Posted by 2SS Capt

[arpad_m]

Originally Posted by Dave777

If you believe in catch cans buy and install it.

If you don’t believe in a catch can don’t buy one.

Belief doesn't play a role here IMO, it's more about individual thresholds of utility and peace of mind.

Catch cans undeniably help, and some ("believers" in your terminology) consider the amount they do sufficient to risk potential warranty repair issues and to invest $100-200-300 into them, while others ("non-believers") deem that extent irrelevant and appreciate their lower immediate risk level more.

All down to individual preferences, which is why in this day and age it's nigh impossible to end a catch can debate, when so many have this "my way or the highway" approach to others' preferences.

[BlackbeastSS2]

My 2 Cents - first of all why manufacturers don’t install catch cans on all cars. The average owner does not have the ability to check and service the unit.

Does everyone need a catch can? Owners that don’t plan on keeping their car long term don’t need one.

The Gen 6 Camaro’s have an oil separator not a built in Catch Can. The oil separator takes both valve cover breather holes and routes them back to the oil separator to which in turn then sends the vapours into the air intake (which dirty your throttle body & your engine) and here’s where the EPA mandates you to burn off the excess oil vapours in name of a clean environment.

Back in the day before the EPA mandate a system like this we used to slap on air breathers on the valve covers to use as crankcase pressure relief. Now you can buy a catch can and basically clean the vapours with the catch can and reintroduce a cleaner version back into your engine with a lot less vapours.

Drag racers do a different version. I use a Mighty Mouse Catch Can and I employ a system which makes both sides dirty. My valve cover breather holes are both sent to my might catch can and I use the top filter as a blow off value in case to much crank case pressure is built up. I don’t introduce any oil vapours back into my engine. I cap the intake manifold that most catch cans reintroduce the basically cleaned vapours from the catch can. The might mouse catch can I have is basically gutted to support two dirt sides going into the can and just used as a blow off valve in my case.

But remember all companies sell there products for profit to make money off you and will tell you that you need one and theirs is the best. It’s a simple device that works and helps your engine last longer. I would not get the cheapest version because of how it’s made is important to me and I would want a reliable one that also looks good if your into that.

This is my take on the great catch can debate. Just my opinion and experience to date.