1989 Ford F-150 Blow-By Oil Use

FORD F-150
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SBCICT
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1989 Ford F-150 SuperCab, 302 V8, 5-speed, 235,000 miles.
did not see a topic for Blow-By which is what i believe my engines problem is. The engine uses about 1 quart every 100 miles or so. No smoke out the exhaust. Engine breather is soaked with oil and intake parts are coated in black stuff. engine runs fine, maybe a little low on power. Anything beyond an overhaul that i can do to help this problem?
Jun 6, 2006 at 4:49 AM
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LOSONE
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The only cure is to overhaul the engine as the compression ring is gone as well as the bottom ring. Oh, you have smoke, you just can't see it. Anytime oil consumption goes below 800 miles it's time for repair. Good luck
Jun 6, 2006 at 6:18 AM
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Suggested Repair

Overhaul the engine. Excessive oil use and blow-by indicate worn compression and oil-control rings, and no lesser repair will cure it.

Conversation Summary

A 1989 Ford F-150 with a 302 V8 uses about one quart of oil every 100 miles. The breather is oil-soaked and intake parts are coated, with no visible exhaust smoke and only slightly low power. The owner asked if anything short of an overhaul could help suspected piston blow-by. The expert said the compression and oil rings are worn, oil use below 800 miles per quart means repair is due, and an engine overhaul is the only cure.

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