Blue smoke and vibration after installing catch can

ADI1991

MEMBER
2005 HOLDEN COMMODORE
3.6L
V6
2WD
AUTOMATIC
150,000 MILES

Dear Experts,

2 days before I installed catch can in my vehicle listed above VZ with Alloytec V6 3.6L. Day after it started shaking on idle and today the blue smoke continuously coming out from exhaust like I worn out the piston rings. When I opened the catch can it was half filled with engine oil in just 2 days.
It was never been like this before installing catch can.

Help please.

4 Replies

KASEKENNY

MECHANIC
18,907 POSTS

So by catch can, I assume you are talking about the oil catchment system that goes before the PCV and prevents oil from entering the intake?

What system did you install? What was the brand and part number and I will look it up so that we can get on the same page about what you installed.

Next if this was not doing this prior then we need to see if you installed it correctly. Clearly you have oil going through the exhaust so we have to find where the oil is coming from. Have you pulled the intake off and checked to see if there is oil in there?

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Monday, June 15th, 2020 AT 1:24 PM

ADI1991

MEMBER
60 POSTS

I want to tell you that when there was blue smoke from the exhaust, I opened up the oil filler cap to check if there is oil back pressure but the most strange thing was the air pressure was there when I opened the oil filler cap. So I removed the whole system and bring it back to factory setting and now there is no smoke nor air pressure in valve cover.

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Monday, June 15th, 2020 AT 1:31 PM

ADI1991

MEMBER
60 POSTS

This oil catch can I used. The reviews were pretty much good.

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Monday, June 15th, 2020 AT 1:35 PM

KASEKENNY

MECHANIC
18,907 POSTS

The only thing I can think is if the lines were installed in the wrong direction. Meaning they were reversed. Basically there is an inlet and outlet of this system and I guess that could cause an issue.

What I would suggest at this point is call the manufacturer of that catch can and ask if they have reports of this. Clearly if you put it inline of the PCV and routed the line coming from the valve cover to the inlet, and the outlet going to the intake, then I just can't explain it.

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Monday, June 15th, 2020 AT 6:53 PM