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Discussion Starter · #1 ·
Just curious. Does pressure build up in the crankcase, specially with an older engine with more blow by?

Recently bought a '92 Honda Accord with 155K miles, went thru it, engine runs fine, changed CV shafts, brakes, oil, tranny oil, coolant, spark plugs, valve cover gaskets, but forgot to put new PCV. I test it on the highway, good long stretch at ~ 90 mph, when I get home, the valve cover gasket which I'm almost 100% was put in right, just "blows out" at one spot, spraying some oil...hence my question above.
 

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If it is stuck closed then it could blow the valve cover gasket from crank case pressure.
 

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Discussion Starter · #4 ·
Cory, If you're meaning what I think you're meaning, then your mind is in the gutter (what's new, right? :D )

Thanks Gordon, that's what I thought.
 

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Gordon's absolutely right of course. I don't know about CC. :D
Older cars used to have their crankcases vented to the atmosphere. Pollution laws made the manufacturers install Positive Crankcase Ventilation (PCV)valves. When they stick closed, pressure can build and the engine reverts to venting to the atmosphere again but instead of pipe going down the rear of the block, it blows a gasket. (Not a seal CC. That's a different joke) :D :D
d.



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