1967 Upper and lower control arm torque settings

[Gerald C.]

To all,

I have all the torque settings done elsewhere on these control arms. However, the manual states, as I read it, that there needs to be 20 lbs of torque on the bolts going into the bushings. Yet, I see that this "could" be 90 to 100 lbs. Can someone help me out to clarify this. It seems that 90 lbs on these bolts seems a bit much.

Thanks,

jerry

[Terry M.]

Re: 1967 Upper and lower control arm torque settings

To all,

I have all the torque settings done elsewhere on these control arms. However, the manual states, as I read it, that there needs to be 20 lbs of torque on the bolts going into the bushings. Yet, I see that this "could" be 90 to 100 lbs. Can someone help me out to clarify this. It seems that 90 lbs on these bolts seems a bit much.

Thanks,

jerry

Jerry,

I can't help you with 1967 torque, but just posting a reminder to tighten these bolts with the suspension at "normal ride height" or you will put the bushings into a torque bind that can result in rapid failure of the bushings.

[Bill H.]

Re: 1967 Upper and lower control arm torque settings

I don't have the manual for my 67 and the 68 chassis manual sucks.

But the upper bolts are 3/8-16 (coarse thread) so the standard torque is 30 lbs.
The lower bolts are 7/16 - 14 so, 50 lbs.

The manual says torque after spring install but I agree with Terry - torque at ride height.

[Ray G.]

Re: 1967 Upper and lower control arm torque settings

Found these torques. Believe these are correct. Front Suspension: Upper A-Frame Bushing Bolt .........30 @ ride height........9/16 Upper A-Frame Align, Shim Nut......50.........11/16 Lower A-Frame Fr. Mtg. Bolts ........70.........5/8 Lower A-Frame Rear Mounting......100........7/8 & 13/16 nut Steering Arm to Spindle ................70.........3/4 Nuts (63-68, 11/16) Ball Joint (upper) .........................45+........3/4 nut Ball Joint (lower) .........................75+........7/8 nut Ray

[John H.]

Re: 1967 Upper and lower control arm torque settings

The lower control arm bushing bolts are 45-55 ft-lbs (at design ride height, as shown in the Assembly Manual). There is no torque shown in the A.I.M. for the upper control arm bushing bolts, as they came into the plant already torqued (with the arm fixtured at design ride height); their spec is 40 ft-lbs, as shown in the "Specifications" section at the back of the Chassis Service Manual.

[Ray G.]

Re: 1967 Upper and lower control arm torque settings

Thanks John.
Had the torques I posted in a file on my computer. I will correct them.
Ray

[Gerald C.]

Re: 1967 Upper and lower control arm torque settings

I really hate to seem naive,but.....I still can't recognize the torque settings for the large short bolt that's on the top of the spindle and holds the backing plate and the top of the disc brake support. Also, the two lower bolts on the backing plate that hold the bottom of the brake bracket and the steering are to the spindle.

Thanks for eveyone's feedback

jerry

[John H.]

Re: 1967 Upper and lower control arm torque settings

I really hate to seem naive,but.....I still can't recognize the torque settings for the large short bolt that's on the top of the spindle and holds the backing plate and the top of the disc brake support. Also, the two lower bolts on the backing plate that hold the bottom of the brake bracket and the steering are to the spindle.

Thanks for eveyone's feedback

jerry

Jerry -

The large/short bolt at the top is 75 ft-lbs. - it's called out as "Brake Anchor Bolt - Disc Brakes" in the "Corvette" column in the '67 Chassis Service Manual. The "Steering Arm Attaching Nuts" item in the "Corvette" column is blank - I think they intended that to be covered by the 75 ft-lbs. item (the steering arm attaching nuts for the other car lines run from 65 to 85 ft-lbs.).

[Gerald C.]

Re: 1967 Upper and lower control arm torque settings

Thank you John!!!! Much appreciated

Jerry

[Ray G.]

Re: 1967 Upper and lower control arm torque settings

Hello Jerry;
When asked for specific bolt torque or proper sequence it is important to add the suggestion of studying bolt torque in general. Factor such as grade of bolt, new or used, and dry or lubricated certainly are factors in the stretching of bolts properly.
Please don't take this suggestion as an assault on mechanical ability. Just trying to be helpful.
Ray