freeing stuck engine

[jerry]

i have a 270 poly engine in a dodge royal with 50,000 miles on it .been sitting for 35 yrs. has anyone freed up a stuck engine without removing the heads?i filled the cyl full of tranny fluid. its been sitting for a month. removed starter so i can get to flywheel for better leverage. like to hear your solutions or do i need to remove heads.maybe someone has had some luck

[greenpigs]

I would not try and spin it over as the rings could very well be seized and score you cylinder wall, I would just pull the motor and tear it apart. I think just squirting some oil in it and fresh gas will not cut it in this case.

[Todd Wilson]

Could be a # of things making it locked up.   I have heard of diesel fuel and Marvel Mystery oil, PB Blaster and the seafoam deepcreep to help break things loose.  Could be a piston stuck or a valve stuck. You might be able to pop it loose with a breaker bar on the pulley. I wouldnt get too forceful with it.   At this point you are looking at a rebuild so you arent out anything if you get it loose and it dont run. Time and patience and it may run again. This could be a several month deal if you take your time.


Todd

[8WHEELER]

It is most likely the rings in the cylinders, but the last 68 440 I bought was for $100.00. It was that cheap
because he told me the engine was froze. I tried to turn it over, sure enough no go, took the heads off
and found a valve stuck wide open. After tapping on the valve it slammed shut, put a socket back on the
crank now with no heads, engine turned over like it was new I got lucky for once.

Dan

[jerry]

i don't know much about this but a stuck valve could cause this. i will pull the valve covers off and take a look.thanks for all the info. jerry