Quote:
Originally Posted by FastEddie313
I did this and now my engine is making a squeeking sound when it is under vacuum...
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Please post EXACTLY what you did (photo is helpful to show individual components).
Back when I did mine, I left out the Duralast PCV valve just to see, I HAD the same exact problem as you did, excessive vacuum causing hissing noise (air sucked into the crankcase via the RMS).
Installed the Duralast PCV Valve, problem solved.
So the Duralast PCV valve reduced the flow from 3/4" to 3/8" and somehow the 3/8" flow restriction does the magic trick, i.e., it is just about the correct amount of vacuum.
BTW, I am 20K since this mod, zero oil consumption. I recommend this mod.