Some didn't even have a bolt, I wouldn't worry about 117 pounds. I tightened mine until the engine turned and left it at that with no problems yet

Sent from my VS996 using Tapatalk

 

Think you're @ over kill...... Chevy is 60ftlbs spec ......

One thing is for sure, you're going to have one h ell of a time getting it off the next time in...

Just fir curiosity, how did you come up with a torque spec of 100 + ftlbs for that bolt?

https://www.jegs.com/tech-articles/sbc-engine-specs.html

Pep

 

Hopefully this isn't a SBC or BBC. That is too much if it is.

A Nailhead is 200-220 ft/lbs. It requires holding the crank at the other end via pry bar between the flexplate or flywheel bolts. And it requires a 1/2" impact to remove, or one big cheater pipe on a breaker bar.

 

Oldsmobile Torque Specs
and
Oldsmobile Full Size 1970-88 V-8


Not sure why the olds engines call for such a high spec

 

Man that's wild as h ell

"200-310 ft. lbs."

Seeing it cannot believe what I'm reading.

I would check around some, maybe contact a source like a Fluidampr That's all the make ..

The Original Fluidampr

Maybe ever ARP

If it were me I'd talk to some pros, just to verify. SNAP is not a good sound anyone want to hear..

LOL

Been wrong before, but that's a big number on that bolt...

But then again the lugs nuts on my truck are 140 ftlbs
Pep

Oldsmobile Torque Specs
and
Oldsmobile Full Size 1970-88 V-8


Not sure why the olds engines call for such a high spec

 

I believe its a 3/4 inch bolt, and yes you need all the torque on it because if it falls out really bad stuff happens.

 

Dang!! My airplane only requires 20 ft lbs on the bolts that hold the prop on. They're 3/8" bolts fine thread.
If they were coarse thread, the torque would be less.
But then again, I've found things that should be tourqued to some astronomical figure, just barely tightened. Tapered axle hub bolts come to mind. They should be liberally greased, tightened 'till it squeaks, then turned another round. But, Folks seem to think that it has a cotter pin, and should be snugged like a front wheel bearing.

 

The factory spec is 60 ft pounds with engine oiled threads.

The ARP bolt is 80 foot pounds with their magic thread lubricant.

Don't forget to put the proper lubricant for whatever the bolt you're using under the washer and the bolt head as well or the torque ready will be reached before the proper stretch and that leads to the bolt coming loose.



Bogie

 

Hey bogie thanks for the info, can you show me where you got that?? Only reason i ask, is because i have not been able to find a source that shows less than 130 FTLB for my 79' olds 403, thanks.
I save every webpage i find now to a hard drive because information on these engines is becoming increasingly limited sadly.