My Father's Oldsmobile

[olds307 and 403]

Ah, the aluminum rods make sense for the failure.

 

[64nailhead]

Oil pump drive is good. 3 broken rods and/or pistons and/or broken block. #8 plug is REALLY tight, 3 &6 will need Helicoils. The oil and water were still separate,

So the motor locked up due to interference, not oil system issue I.e. spun bearing?

 

[fleming442]

Seems like component failure to me

 

[Texas82GP]

Damn it!

 

[Turbo Zach]

We have all been there brother. Maybe not to that extreme, but been there. Looks like a good excuse to build a bigger engine!

 

[fleming442]

481ci Oldsmobile Stroker-Motor Build - Hot Rod to the Rescue

Rob Van Vleet’s Big-Block Oldsmobile Spins Rod Bearings. Hot Rod to the Rescue.

www.hotrod.com

I discussed this with Frank last night. The problem is that we tried to put an Eagle 4.5" crank in this motor, but it was going to be $600 worth of mallory to get it neutral balanced. I have a pipedream of some 1.88 used Nascar rods. He's got a 2.1 425 crank on the shelf, so that's a possibility, too.
You know it's bad when one of the best Olds guys in the country says he's giving up and going Chevy. Performance Oldsmobile engines truly are dying. Maybe I should take better care of the next one........ NAH!

 

[64nailhead]

Maybe I should take better care of the next one........ NAH!

I agree and here's how :-o

 

[64nailhead]

Just kidding. Bummer is an understatememt.

Is the block OK?

 

[fleming442]

I think some valve springs broke and dropped some valves. Holes in pistons. Lower bottom still looks good. Baffle broke out of the oil pan; not sure where that will lead. So, we're looking at new pistons, a head redeux, and block or block clean up. Huge weight lifted, as it's no where as bad as I was thinking.

 

[81cutlass]

Already have aluminum heads? If so, if they are boogered it's an easy weld repair. If not it's a good reason to upgrade 🙂

That's some good news. Maybe something funny like an air filter stud or nut made it's way into the engine? Breaking multiple springs at the same time seems odd.

Guy I knew took his air filter off at the track but didn't pull the stud. Somehow it ate the stud and the valves cut the stud into little pieces and 5 pistons and both heads got chewed. Same scenario, locked up and few plugs were hard to get out