Oil

Asked by Jonyr Apr 07, 2019 at 12:18 PM about the 1989 GMC Sierra 1500 C1500 Standard Cab SB

Question type: Maintenance & Repair

I drained the oil in my 89 gmc seirra 1500
2wd and is was very thin and smelt like has ..
the reason i drained it was because it was
way over filled for some reason ... ehy is this

3 Answers

F_O_R answered 5 years ago

I think you have a leaking injector which filled up the crankcase with gas.

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KenF answered 5 years ago

Probably TBI injectors flooding , bad fuel pressure, bad injector, bad o ring, they can piss fuel into the bores and then they leak into crankcase past rings.

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F_O_R answered 5 years ago

Change the oil immediately and fix the leak before you ruin the engine.

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