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Air keep blowing out from engine main filter hole

Tiny
ZACH134
  • MEMBER
  • 2011 HONDA CITY
  • 1.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
This didn't happened before, I left my car at home for 1 week and after I came back from holiday, I try to start my car for a warn up, after the engine started I open the main oil filter cap, I realize there suddenly air blowing out from it, I had send my car to some workshop for some valve check, all valve and air hose are in good condition, what happens to my car?
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Thursday, July 10th, 2014 AT 7:43 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,164 POSTS
Air is produced in the combustion chamber via compression bypassing the cylinder rings. ALL cars do this. There is a PCV valve that is to recirculate the crankcase emissions back into the engine. First, don't be too worried about this happening. They all do it to some degree. However, I do recommend that you checked the PCV system and make sure it is producing a vacuum to help draw the crankcase emissions out of the engine.
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Thursday, July 10th, 2014 AT 8:02 PM

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