crankcase vacuum
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TECH Enthusiast
Joined: Nov 2001
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From: Rockland County, NY
crankcase vacuum I noticed something with my car that I don't think is quite normal. If i cover the oil fill hole for a few seconds with my hand while the car is running, I can feel a noticeable suction when I pull my hand away. I checked another LS1 at idle and it doesn't do this.
Now, one thing to point out is I run a Metco breather, and therefore I have the fresh air tube from the TB to the valve cover capped off. Could this be the reason for it or does it sound like another issue? FWIW, I have had oil consumption problems for a while.
Now, one thing to point out is I run a Metco breather, and therefore I have the fresh air tube from the TB to the valve cover capped off. Could this be the reason for it or does it sound like another issue? FWIW, I have had oil consumption problems for a while.
Re: crankcase vacuum yep thats why, you have moved the air souce from the tb to the hole that you are covering up with your hand, but not directly causing oil consumption.. definitely not at wide open anyway.
Thread Starter
TECH Enthusiast
Joined: Nov 2001
Posts: 696
Likes: 0
From: Rockland County, NY
Re: crankcase vacuum
The Metco breather must be more restrictive than the factory breather hose. Did you notice less oil consumption after switching to the Metco?
oh well 
