Torque Values At Lower Ball Joint & Steering Knuckle

Hey All!

Having a problem here torquing the 4 bolts at the lower ball joint to the steering knuckle.

2001 Prerunner.

The FSM calls for 59ft lbs in at least 3 different places in the manual.
But at those values I've already snapped one bolt and feels like the same will happen w/the others if I continue.

I've tried 2 different torque wrenches but they both are identical in torque values in everything I've tested so far.

So the question is:
Are these the correct torquing values? It seems a lot for a 10mm diameter bolt.

Anyone w/experience w/this?

Thanks!
-Royce

 

Thanks!

Well, if it were inch pounds, that would be roughly 5ft lbs.
I was thinking maybe 30lbs max.

-Royce

 

Don't know what the problem is, but a couple things to note: When you never seize bolts, you are actually applying a lot more torque then if the thread were dry. Are the bolts new? Rusted near the head? What grade hardware? A 10mm bolt in grade 8.8 will lift ~3600 lbs, but a grade 12.9 will lift ~12,200, (believe it or not they are strong suckers in tension). I just changed my lower ball joints and used the stock Toyota bolts, I had at least 60 ft.-lbs on them without a problem...but the truck is only 4 years old too (maybe less rust?).

 

Appears to be an 11T w/1.25 pitch which would max at 64lbs.
Used.
Added just a bit of oil because of light corrosion along the length of bolt.
Maybe should have left them dry!?
Never really had a problem w/this before.
They will click at 40, but any more feels as if they will snap or strip.

-Royce

 

Um, I torqued down the bottom nut attaching the ball joint of the TC UCAs to the knuckle to between 80-100 #s. Too much??

 

Upper ball joint 80lbs.
Lower 103lbs.
PreRunner and 4WD.

-Royce

 

Good! I thought that was the spec... Was about to start worrying about snapping off the bolt.......

 

Ahh! Overlooked that!

-Royce