Was gonna turn the engine over via the crankshaft bolt to get at the torque converter bolts but there is none. Seems to me there are threads there for one - is a Caddy motor like Chevy and Pontiac meaning there SHOULD be one there? :bonkers:

Nope. None of them have the bolt. They are assembled with a fixture and then it gets removed. They stay together fine. Welcome to better toleranceville.

Thanks a bunch. A mechanic (?) here said it needs one and the crank will walk without it eventually chewing up the mains. Suggested I bring it to him now. Imagine that. The Caddy dealership / service dept locally had no idea. I wonder if they have mechanics there... Guess I needed that welcome to toleranceville after all. :annoyed:

They actually came from the factory with a cork stuck in the threaded hole.

I forgot all about the cork. Thanks for the reminder. Yup the guys at the Cadillac plant sat around at the end of the day toasting all the new powerplants.

Thanks a bunch. A mechanic (?) here said it needs one and the crank will walk without it eventually chewing up the mains. Suggested I bring it to him now. Imagine that. The Caddy dealership / service dept locally had no idea. :annoyed:

Don't expect too many dealershit mechanics to know anything specific about something that old. All those guys bailed out of Cadillac when they got killed swapping HT4100's on warrantee time.

The crank hub is just press fit on there! It's a beeotch to get off, and back on with a puller. And yes, like someone mentioned, there was a small cork placed in the hole to protect the threads from dirt.

You can put a bolt in the crank but they ARE press fit on.....a bolt isn't necessary. If you choose to use a bolt, the size is 9/16-18.

You can put a bolt in the crank but they ARE press fit on.....a bolt isn't necessary. If you choose to use a bolt, the size is 9/16-18.


I bought a bolt that is 9/16 but couldn't turn the motor.

My question is does the "18" refer to length of the bolt threads?

If so then I bought the wrong length, i bought one kinda short and another one kinda long.

Hello.
18 has nothing to do with the actual lenght of the bolt, if it's long or short.
18 stands for how many treads there is per inch - if it is a UNC or UNF kind of bolt. If you have been able to screw the bolt in you have the right bolt, and the lenght schould be that the bolt head, with washer, become fully seated agaist crankshaft, with atleast 1 inch of treaded bolt screwed in the crankshaft.

jolle

Hello.
18 has nothing to do with the actual lenght of the bolt, if it's long or short.
18 stands for how many treads there is per inch - if it is a UNC or UNF kind of bolt. If you have been able to screw the bolt in you have the right bolt, and the lenght schould be that the bolt head, with washer, become fully seated agaist crankshaft, with atleast 1 inch of treaded bolt screwed in the crankshaft.

jolle

Ok so the threads inside the bolts are only 1 inch long? and what is UNC and UNK?

I will try it again this weekend, and maybe even jack it up, and use my flywheel turner

Thanks

hello.
I'm not sure i know what you mean with your first sentence. I don't know how far in, in the cranckshaft the hole in the crankshaft is treaded, but i thought that if a bolt goes in about a inch there is no risk of stripping the treads by try to turn the crankshaft.

the UNC and UNF is a standards of bolts it means:
UN = Unified
C = Coarse there is also a Fine version of Coarse but they both called UNC.
F = Fine- or, really extra fine

When i looked at a site i see that 9/16 18 is the finer UNC tread.

I add the link

http://www.efunda.com/DesignStandards/screws/screwunc.cfm

Jolle

Thanks,,, i got out there and played around earlier today,,,

Last week, it didn't dawn on me to cut the belts off until i got out there today, and it was a little warmer...

I cut the belts; put a wrench on the motor and it turned ;;SMOOTH AS BUTTER....

IT FRICKIN MADE MY DAY,,,

I plan to pull the motor in a couple of weeks to clean, paint and bring back to life....

I cut the belts; put a wrench on the motor and it turned ;;SMOOTH AS BUTTER....


That just means you have no compression! :histeric:

Actually that means, my motor is not locked up...!!!!!


mechanics 101; if you can turn your motor (rotate by hand)....

the belts were rusted on to the pulleys...