Torque specs needed

[Rob M.]

Can someone help me with the torque specs for the following:

1. front splash shield bolt to steering knuckle/spindle
2. 2 bolts that hold the steering knuckle arm and brake mounting plate to the spindle

The car is a 66 and I can't find the specs in the AIM or CSM.

Thanks in advance

[Joe L.]

Re: Torque specs needed

Can someone help me with the torque specs for the following:

1. front splash shield bolt to steering knuckle/spindle
2. 2 bolts that hold the steering knuckle arm and brake mounting plate to the spindle

The car is a 66 and I can't find the specs in the AIM or CSM.

Thanks in advance

Rob------


The front brake anchor bolt (the single 11/16-16 bolt) is 120 lb/ft.

I've never found a spec on the steering arm bolts. I use 70 lb/ft on these 7/16-20 bolts. However, I don't know how accurate measured torque is on these bolts since they use a lock nut.

[Rob M.]

Re: Torque specs needed

Thank you Joe.

I couldn't find anything on either. I torqued the steering arm bolts at 65 ft. pounds.

The upper splash shield/upper brake mounting plate bolt I didn't torque to 120. Are we talking the same bolt? The one I'm talking about is 15/16" by 1 1/4" long. I tried to take a picture to post, but I'm having a hard time posting pictures. I can email you, if you like.

Let me know and Thanks again.

[Joe L.]

Re: Torque specs needed

Thank you Joe.

I couldn't find anything on either. I torqued the steering arm bolts at 65 ft. pounds.

The upper splash shield/upper brake mounting plate bolt I didn't torque to 120. Are we talking the same bolt? The one I'm talking about is 15/16" by 1 1/4" long. I tried to take a picture to post, but I'm having a hard time posting pictures. I can email you, if you like.

Let me know and Thanks again.

Rob------


That's the one. There's only one on each side at the top. This is the brake anchor bolt. GM says the torque on this bolt is 120 lb/ft. While it might seem like it, this is not excessive torque for a bolt of this thread size and SAE grade 8 material spec. By the way, the same bolt was used from 1965 to 1982.

[Joe L.]

Re: Torque specs needed

Rob------


I find that I am incorrect on this one (but I sure can't figure out why). I was going by the GM specification for 1969+. Since the bolt used for the entire 1969-82 period was the same as that used for 65-68 (GM #3864119 for the entire 65-82 period), I figured the torque should be the same. However, according to GM, the torque for 65-67 is 75 lb/ft. The torque for 69-82 is 120 lb/ft (I don't have 68 values). Why the difference? I have no idea; it doesn't make sense to me. It's possible, though, that one of the torque specs is incorrect. As I mentioned previously, given the size of the bolt, the 120 lb/ft spec seems more reasonable to me.

[Rob M.]

Re: Torque specs needed

Joe,

As always, you are a tremendous help. Thank you.

Regards