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Discussion Starter #1
Hi everyone. New to the forum and don't have the ats yet. I will be getting a used one this weekend. 3.6 performance. I've been informing myself on the Issue with the catch can. I see that the 2.0t require it but I see that's it's not just a 2.0t problem. Apparently it's the 3.6 engine from gm. Should I worry about putting one on the 3.6? I also have a buick lacrosse 3.6 for my wife and they carry the same engine. If i need to put one on the ats then I'll need to put one for my lacrosse. Thanks in advance.
 

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2013 3.6 RWD Premium - 2006 BMW Z4M
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After everything I have read about the catch can, the length of time the 3.6 DI engine has been around, and the number of reported problems, I am not going to do it.
 

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redgp said:
Hi everyone. New to the forum and don't have the ats yet. I will be getting a used one this weekend. 3.6 performance. I've been informing myself on the Issue with the catch can. I see that the 2.0t require it but I see that's it's not just a 2.0t problem. Apparently it's the 3.6 engine from gm. Should I worry about putting one on the 3.6? I also have a buick lacrosse 3.6 for my wife and they carry the same engine. If i need to put one on the ats then I'll need to put one for my lacrosse. Thanks in advance.
I wouldn't say it "needs" one. But it's not going to hurt to put one on it. All that oil is going through the intake and getting all over the valves with nothing to clean it off. It just keeps building up and gets nastier and nastier. Plus it creates detonation and you'll lose a little power. My catch can works pretty good. It catches about a cup of oil every oil change. I personally would recommend one unless you just don't care.
 

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ats v coupe a8
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I wouldn't say it "needs" one. But it's not going to hurt to put one on it. All that oil is going through the intake and getting all over the valves with nothing to clean it off. It just keeps building up and gets nastier and nastier. Plus it creates detonation and you'll lose a little power. My catch can works pretty good. It catches about a cup of oil every oil change. I personally would recommend one unless you just don't care.

Which one are you using? I'm thinking of putting one in, take a look at the picture where I removed the white plastic baffle/surge protector - located between air box and turbo. This is a problem, correct? intake baffle.jpg
 

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2016 ATS-V 6MT; 2013 ATS 2.0T RWD
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superflyjimmys said:
Which one are you using? I'm thinking of putting one in, take a look at the picture where I removed the white plastic baffle/surge protector - located between air box and turbo. This is a problem, correct?<img src="http://www.cadillacforums.com/forums/attachment.php?attachmentid=320562"/>
The 3.6 is naturally aspirated and doesn't have a turbo. You have the 2.0T. This thread is for the 3.6 V-6.

I'm sure it was just a mistake you posted here, in that case I would recommend a catch can for the 2.0 turbo. Not as necessary (in my opinion) for the 3.6.
 

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2015 ATS 3.6 RWD Premium
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Here you go. Two sides to the story. Even though this is taken from the Camaro Forum, it's the same engine build. I had a catch can on my 2008 CTS 3.6 and currently have one on my 2015 ATS 3.6. The can on my CTS always had drainage at every oil change. In the big scheme of things, it's cheap insurance and good preventative maintenance.

http://www.camaro5.com/forums/showthread.php?t=290860
 

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As with most things, still skeptical until I see proof. Only picture on the link is posted by SC2150 (Account Suspended on that site), guessing same one that posts here and is selling the catch can. Whenever I ask for details on the pictures he posts he is gone and also still believes that hydro lock dooms the 2.0T to failure (solved by the catch can he sells).

With DI 3.6 V6's out since 2008 shouldn't there be massive reports of problems with pictures everywhere? Some are 8 years old and should be above 100k miles. With the Audi A3 i used to have (06-08.5 were the worst) most decided the catch can didn't solve the problem because a large part of the issue was the valve seats weeping oil, just delaying the required manual cleaning.
 

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My personal opinion, what you are seeing caught in a catch can, is condensed water vapor darkened by soot. This is caught while the catch can is cold, right after an engine start and ceases to work after it gets warmed up under the hood. If the catch can was catching a lot of oil, you would see an appreciable loss on the dip-stick. My car does not use hardly any oil as measured by the dip-stick between oil changes. I don't think oil vapor passing through the intake system is a problem.
 

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As stated before...many opinions on this subject. Thanks for the input on what you think I see, however based on my experience owning and working on my own cars over the years and the ATS being the second car with a 3.6DI, the drainage I observe in the catch can during oil changes then and now is not "condensed water vapor darkened by soot". As far as oil usage, I can only say that you are fortunate. My 2008 CTS 3.6, like many others used approximately 3/4 of a quart of oil during the 5K mile interval. In addition, when the 2nd Gen CTS's were taken to the dealers for the infamous timing chain failure, the first area to be checked was the oil level to ensure the owners were monitoring the level on a regular basis due to the engine's usage. At any rate... I have the catch can on the bride's ATS and am comfortable with the preventative maintenance.
 

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Discussion Starter #10
I ended up purchasing catch cans for both cars. I'll take it as cheap insurance. I ended up going with saikou michi cans since I know that they were mentioned to be good catch cans by (RX) sc2150. Not to mention that I got 2 cans for half the price of 1 RX can. Their customer service is great. We emailed back and forth for about 3 weeks and I felt comfortable with his advice. Plus he is local to me. They're made to order so we will see how they work when I get them in about 8 weeks.
 

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2013 ATS-4 PREMIUM 3.6, 2017 Lexus ES350, 2006 Chevy Silverado LT
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Recent owner of a 2013 ATS4 3.6 Premium with 52k on it. Car is running great and no issues but after reading about this issue of carbon buildup on the valves as a possibility I want to install a catch can. There are so many brands out there and not sure if they are specific to a brand car and engine size or is it one size fits all. Any info or recommendations would be appreciated. Installation difficulty or problems?
 
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