I have problem with oil getting out from from the cam breather to the air intake.
Engine is a Z20LET with stage 4 tuning. 32k miles.
There was a problem with the big breather from the rocker cover ,
it was totally clogged since the tube was separated from it's different layer.
It's fixed but this wasn't the problem.
Have changed to 10W/60 oil but couldn't really see a big difference.
Have tried with a cam breather and a catch can but the amount of oil is just to much when turbo is loading.
I have read a lot in this forum about oil going to the air inlet.
But this is something else it can not be normal. It's like the engine is pumping out oil when turbo is loading.
Just speculating here but some gasket or similar in the engine is probably broken because of the earlier problem with the clogged big breather.
Anyone had any similar problem or can point me in some direction?
If you wish to perform a small test yourself (to identify which of the 2 problems above it is), try this:
1. Disconnect the crank case tube 90 degree silicon bend from the cam cover.
2. Start the engine and get someone to rev it to about 5000 RPM.
3. Not much gas/pressure should be coming out of the silicone pipe.
Ideally this test should be done when the engine is loaded hard (ie when the turbo is boosting hard). To achieve this you could vent the 90 crank case vent silicone pipe via some hose pipe or something into the cabin, then whilst driving (with your foot down) you can feel what pressure comes out of the pipe. If there is no pressure then it is your valve stem seals that have failed.
Good luck.
