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Old 10-06-2021, 09:25 AM   #2
95TA - The Beast
 
Drives: 2014 Cadillac CTS4 2.0T Performance
Join Date: Sep 2019
Location: WI
Posts: 120
Quote:
Originally Posted by rayruner View Post
Actually the whistle started after i plumbed vacuum into thr crankcase, the whistle is under the valve cover. thanks
OK, so why would you plumb vacuum into the crankcase???

Why would you mess with the vacuum/PCV system at all?

If it is hacking into place a custom catch-can system, you obviously did it wrong. Buy one of the solutions that is known to work.

To ask why something you did wrong is making noise does not make sense. Undo whatever you did, plain and simple.
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