I have and 88 ford. A lot of oil is coming out of the breather cap, i purchased a new one and still having same problem.

Asked by Aug 10, 2015 at 10:20 PM about the 1988 Ford F-150 S Standard Cab 4WD LB

Question type: Maintenance & Repair

just bought a 88 for f-150 straight 6. Only has 100,986 miles on it. A lot of oil is spitting
out the breather cap right next to the oil cap. not sure how to fix this problem.

4 Answers


Check the PCV system, make sure there is a good vacuum supply to the valve and the fresh air tube and filter is clean for the PCV system. Remember these motors are low RPM torque motors, so keep the RPM's down. I never turned mine any faster than 3000 RPM. If it still kicks out oil after you have checked everything out then chances are high that the rings are worn out.

2 of 2 people found this helpful.

You shouldn't have a breather cap. There should be a tube going from the valve cover to the air cleaner assembly with a crankcase ventilation filter on the inside of the air cleaner assembly. HTH. -Jim

1 of 1 people found this helpful.

It's called blow-by

1 of 1 people found this helpful.

Could be. Or it could be caused by a clogged or misrouted PCV (Positive Crankcase Ventilation) system. I used to get oil (blow by) in the air cleaner assembly of my '70 Catalina. But at 42 years old and nearly 200,000 miles I considered it normal. HTH. -Jim

1 of 1 people found this helpful.

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