Oil leak

JERISAN

MEMBER
1989 CHEVROLET 2500
5.7L
V8
4WD
AUTOMATIC
440,000 MILES

Hello, I have an old truck that started knocking. Checked oil and there was none, filled it with cheap Walmart oil 10w30 (what was recommended by spec) and kicked it over almost immediately white smoke came out and never stopped. After shutting it off the oil drained out of somewhere. Cannot locate any cracks in the metal. Checked oil level, almost nothing is left. Stopped driving it and it has been sitting in front of my house for over a year. Before this the transmission had been rebuilt and it was very powerful. I do not know what to do. Is it worth repairing?

5 Replies

PATENTED_REPAIR_PRO

MECHANIC
1,853 POSTS

White smoke coming out where? The tailpipe? If so, that usually indicates and blown head gasket.
If you fill the engine full of oil right now where it sits, does the engine leak oil, without starting the engine?

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Saturday, October 28th, 2017 AT 1:41 PM

JERISAN

MEMBER
3 POSTS

Smoke from tailpipe, yes. I have not tried to fill it with oil again since

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Saturday, October 28th, 2017 AT 2:32 PM

PATENTED_REPAIR_PRO

MECHANIC
1,853 POSTS

Is this a dual exhaust or not?
If dual, and it only smokes white out one tailpipe, then the side that smokes has the blown head gasket on that side in between the cylinder combustion area and the coolant passage and coolant is entering the combustion chamber and getting burned.
Put 5 quarts of motor oil in the engine and try to see what is leaking.

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Saturday, October 28th, 2017 AT 2:41 PM

JERISAN