Alternator bolt torque settings?

[wazzabie]

On a 78 350 V8 anyone know what torque I should use for bolts A and B? I looked in the factory manual and could not find the specs. For bolt C I found an article from delco.

bolt A - torque ?
bolt B - torque ?
bolt C - 18 ft/lbs per delco

bolt

 

[wazzabie]

For bolt A and B I tried 30 ft lbs but I thought it was not going well. So I ended up just going by feel for what the torque should be.

 

[tarussell]

Assuming all threads are clean those type of bolts are generally around 20ft.lbs. for non-plated hardware.
As a very general rule a 5/16” thread will be about 14ft.lbs. and a 3/8” thread is about 25ft.lbs. - these are just basic rules of thumb.

 

[dyeager535]

I'd almost bet c and a should be the same. Basically the same bolt (IIRC) and both thread into the alternators aluminum case right?

But I never worried about it. None of them need to be gorilla tight. Long bolt gets tightened pretty good, the upper adjusting bolt enough to keep it from self-adjusting. Once the alternator is mashed up against the bracket, a bit more and it's good.

 

[RaisedK5]

I've always used German standard, gutentight.

 

[eodcoduto]

Snug and a 6th, run the bolt down until its seated then 60 degrees additional. This is a no sh$t tightening sequence we use at Lockheed daily.