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Possibility of Clogged PVC

Tiny
NONDRIVER65
  • MEMBER
  • 2008 MAZDA TRIBUTE
  • 2.3L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 72,000 MILES
When the engine is running and I take off oil fill cap there is a lot of air flow with sound coming out of fill hole, like it an exhaust port. Does this mean my PVC valve is clog? Also, engine idles differently when cap is off.
Saturday, September 24th, 2016 AT 11:21 AM

1 Reply

Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
The PCV system could possibly have carbon build-ups in it.

However, the PCV can only "vacuum" so much, even in pristine condition.

Ring wear (even a broken ring), cylinder wear, might cause excessive blow by, a compression test might be a way to verify it.

The Medic
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Sunday, September 25th, 2016 AT 2:10 PM

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