Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks
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We are rebuilding a 1938 chevy. We were told the engine was rebuilt. The engine runs smooth, but smokes on deceleration. There is about 130 psi at each cylinder. #1 plug looks clean, all other plugs are black, like carbon build up. Any ideas on what we should check before we replace the engine?
Hi Mario, You have another 38? I didn't move to Texas. I'm still working on my 38
Mike
How far has it been since the rebuild?? Some rings take longer than others to bed in a seal the oil in place, another possibility is it sat for an extended time after the rebuild and the assembly lube has hardened a stuck the oil rings in the pistons. Another possibility is excess valve guide clearance but that shows up more at initial start, I have used the umbrella seals with good results though others on here have had the opposite results.
Tony
the engine was probably rebuilt 7-10 years ago. We will keep running it to see how it does.
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