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Old Yesterday, 06:25 PM   #1
kglewis1
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Drives: MK6 GTI '11
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Help: Pressure under oil cap, Oil consumption/loss

I've recently been experiencing symptoms which would indicate a failed PCV valve, however, I recently installed the ECS Catch Can system, and shortly after that a brand new genuine PCV valve since this system still relies on the PCV to function. Since installing these, one of the issues I was having went away. Before the install, my car would rev in neutral before settling back to 800 RPM. Now it stays fairly stable at 750 RPM with no self-revving. However, I still have pressure behind the oil cap and my catch can fills up ever 400-500 miles driven. This is causing a drop in oil level, to the point where it barely registering on the dip stick after only 1500-2000 miles since my last oil change. Is this normal behavior or does anyone have any thoughts on what might be going on?
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Old Yesterday, 07:26 PM   #2
Slowgti08
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My assumption would be that your rear main seal went out.. check the area where your trans meets the engine and see if there's oil in between that's dripping.
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Old Yesterday, 08:39 PM   #3
kglewis1
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I believe the rear main seal is fine. I don't see any oil leaking in that area, and my transmission was replaced about 2 months ago.

Edit: I removed the catch can system and reinstalled the pcv system tonight. When I pulled the dipstick or removed the oil cap, the engine ran a little rough. However, the is still a lot of air blowing out of either the dipstick or oil cap when removed.

Last edited by kglewis1; Yesterday at 11:19 PM.
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