1989 Toyota Corona Oil Pan Pressure

TOYOTA
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SPOT0112
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i have a 1989 toyota corona E.ST170-AEPNM running the 4S-FI 1838cc motor the car is pressurizing the sump and blowing out the oil it does not appear to have a pcv valve as such can anyone shed some light on this please :evil:
Apr 14, 2007 at 1:47 PM
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RASMATAZ
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[quote:ff2e79cf13="spot0112"]i have a 1989 toyota corona E.ST170-AEPNM running the 4S-FI 1838cc motor the car is pressurizing the sump and blowing out the oil it does not appear to have a pcv valve as such can anyone shed some light on this please :evil:[/quote:ff2e79cf13]

Better recheck again-Nowadays we use Type 4 closed ventilation system-did you check on top of the valve cover-sometimes you have to pry it off and end up braking it. and while your on it-check the filter and hoses in the air housing.

Your problem is, its flowing backwards creating the pressure and can blow out oil seals.
Apr 14, 2007 at 5:58 PM

Suggested Repair

Recheck the closed crankcase ventilation system on top of the valve cover; it may need to be carefully pried off. Inspect the filter and hoses in the air housing, since reverse flow can pressurize the sump and blow oil seals.

Conversation Summary

The owner of a 1989 Toyota Corona with a 4S-FI engine reports sump pressurization and oil being blown out, and does not see a PCV valve. The expert advises rechecking the closed ventilation system on the valve cover and inspecting the filter and hoses in the air housing, because reverse flow can create pressure and blow oil seals.

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