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      01-05-2021, 03:49 PM   #8
Jay1101
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Drives: 2007 335i
Join Date: Dec 2020
Location: Rockvilled, MD

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Quote:
Originally Posted by Luis561 View Post
If you pull the intercooler out you can get a really good look under there. My drain plug was leaking but it was so hard to see from where until I pulled out the Intercooler. Pulling it out is very easy you'll spend more time removing the under tray
Did you pressure test it before you found out? I pressure tested mine and it holds pressure when it's cold which is why I didn't think it could have been a split hose or a leaky drain plug. It only starts to leak when it gets hot and cools down and also doesn't hold pressure then either. This is why I thought it had to have been the old O-Ring excessively shrinking.
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