Question about 1990 Toyota 4Runner

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My toyota has white blowby on oil cap is this a sign have a blown

My toyota 4runner 1990 it was park for only a week after i turn it on i notice
on the oil filler cap there is milky not to much could this be a sign that the
engine gasket its blown..i check the spark plugs its ok they they dont look
wet or soak with oil,olso i pulled the dip stick the oil its clean not not
milky what can i do next bebore i start taring down the engine thanks....
thanks. i need help help .bad thanyou once again........

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Do compression check,if all cylinders are within 10 psi your O.K.. Also check oil filter for water (milky) or oil change and check radiator fluid level for any loss. If all is good it could just be from water in the air.

Posted on Jan 12, 2009

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Take all your spark plugs out and do a compression test on it if you have a repair manual the specs are in there if there is low pressure in any of them you have a blown head gasket

Posted on Jan 12, 2009

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It could just be some sort of condensation. I would clean the oil cap well and drive it for a few days. Then check it again. If its a coolant leak it will not go away. I would eliminate the easy stuff before you tear into it.

Posted on Jan 12, 2009

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