Question about 2002 GMC Savana

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Gmc savana 2002 has lot air front oil cap

Lot suck air came front oil cap..l check pcv valve see fine my is intake manifull?

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  • pablo
    pablo Mar 28, 2014

    l got gmc savana 2002 and recently has lot air came front oil cap

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The PCV valve may be fine but what about the hose . It cab ne blocked up . Is the PCV valve connected up right . It is a one way valve and opens under vacuum ( when the engine is overrunning the throttle ). The extra air from the filler cap is an indication of excessive blow by in the combustion chambers past faulty/ worn/ broken rings.

Posted on Mar 29, 2014

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Posted on Jan 02, 2017

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