I have 1997 ford ranger with apparently a large amount of blowby, I most recently removed my aftermarket air filter to clean and noticed a large amount of oil pooled up in the housing leading to the intake. I first cleaned it out, replaced the pcv valve, and all the gaskets on the motor. I also changed the oil and started using Lucas brand in hopes to lower the blowby. about 400 miles has gone by now and again i remove the air filter and the housing only to find yet again oil pooling up in the filter leading to the intake, what do i need to do to get rid of this problem: note i am not lossing coolant.
Try an oil system flush. if professionally done will run 50-80 bucks. Home remedy is 1 week before next oil change, drain 1 quart of oil then add 1 quart of transmission fluid to oil pan. This has detergents in it that will break up sludge. Repeat this for the next three oil changes and blockage will probably be gone.
Good possibility you have an oil passage partially blocked (common with older engines) and easy to remedy. Not saying that is it for sure but it is cheaper than a ring and valve seat set.
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