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why is there alot of pressure comming out of my valve cover oil fill hole on 1987 toyota pickup?

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Old 20 Jul 2010, 04:33 pm   #1 (permalink)
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Default why is there alot of pressure comming out of my valve cover oil fill hole on 1987 toyota pickup?
why is there alot of pressure comming out of my valve cover oil fill hole on 1987 toyota pickup?
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Old 20 Jul 2010, 04:36 pm   #2 (permalink)
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Combustion blowby the rings causes pressure in the crank case. Quite natural to a certain point. The PCV valve (Positive Crankcase Ventilation) is supposed to relieve the pressure to the intake manifold and re-burn the crankcase blowby gases. Make sure PCV valve not stuck or plugged. Worn rings may give excessive blowby - higher pressures. There is a compression leakdown test that can tell if ring wear and blowby is too high.
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