Oldsmobile 257 engine stuck
#1
Oldsmobile 257 engine stuck
Hello all, today i plan to do the ultimate last attempt at freeing up my 1948 olds 98s original straight 8 engine. The engine is in ok shape considering its been parked since 1968 no ridges at top of cylinders and pistons tops look clean and ok except for the cylinder at the front of the engine it has some pitting. All but 3 of pistons are "free" because penatrating fluid leaks past them. so today i'm going to hone the cylinders to get rid of light surface corrosion. Then i'm going to mix 50/50 gas and ATF and catch it on fire in the cylinders
i have a jack applying constant rotational pressure to the crank via a breaker bar. Any tips/suggestions?
P.S. I have let the cylinders soak for over a year now
i have a jack applying constant rotational pressure to the crank via a breaker bar. Any tips/suggestions?
P.S. I have let the cylinders soak for over a year now
#4
Seriously , this sounds like a very dangerous stunt to do . An aceytelene torch maybe , An open fire no .
If there is rust pitting on the cylinder walls , the engine will need to be overhauled . Including boring the block and installing new pistons .
Nothing else is going to work .
The best idea is to remove the engine and dismantle it . If you are lucky you may be able to remove the crankshaft with the stuck pistons still in place .
To remove those pistons , pound them out with a piece of 4X4 (trimmed to fit the cylinder) and sledgehammer .
#5
Update: just honed the cylinders i can access the walls are quite nice small ridge at top i can't catch my finger nail on going to pick up a sledge tmmrw along with a 4x4 and proceed with the process
#6
While heating the cylinders and chilling the pistons might help to release them, you should be careful when dealing with flammable (or is it inflammable?) mixtures. It would be a shame to burn down (or is it up?) the garage. BE CAREFUL!
#7
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Last edited by coldwar; October 8th, 2018 at 10:33 AM. Reason: thought
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