Can anyone tell me what the front sub frame bushing bolt torque specs are? Thanks,,, Paul

Rear and mid position bolts - 75 to 95 ft lbs.

Front (radiator support) bolts - 30 to 40 ft lbs.

They are in the Factory Service Manual.

I second mr salmon. The torque specs are a mystery and not published anywhere. What he listed is the generally accepted torque.

I was wrong. I got those values and many others for the front suspension from the 1967 Camaro Assembly Manual. I put together a "cheat sheet" for my reassembly.

I stand corrected if they are listed in the crapmaro manual. I never found them in any Pontiac manuals.

I checked the 69 factory manual [sect. 2] and they show the bushing [aka body vibration dampener], but there's no torque spec. I also have a Fisher body manual and there's nada in that too. There is a spec for full-size cars which is 25-40 ft./lbs., but that's a full frame not a uni-body.

I'd bet Pontiac didn't expect there cars to be around 45 years later and the bushings where suppose to last the life of the car.

I just replaced my body bushings with delrin bushings and the install instructions listed 150 ft./lbs. This seems accurate considering the size of the grade-8 bolt. The original bolts required < 60 ft/lbs when removed, so I'm not sure if they were loose after 45 years or ?

150 ft lbs is pretty severe. I wonder if that will tear out the captured nuts

I agree, that's a lot of torque on a captured nut.

The bolts are NC 5/8-11 [grade 8] which has a spec torque of 159 ft./lbs., so 150 is not too far off.

I didn't have any issues with the capture nut.

BTW, the radiator support bolt is a little less at 120 ft./lbs.

The other consideration for too much torque is crushing the sleeves in the mounts. I'd stick with salmon' torque numbers since that is what GM recommended. That's what I used and it's plenty snug.

I'm very surprised that GM engineers never recommended bend-over locking tabs on the bolt heads.

After all the effort it took me to get mine off, I can understand why they thought it wasn't necessary to lock the bolt.
159 ft/lbs is great for the bolt but the cage that holds the nut can sometimes break off when removing the bolt.

Or the nut may turn in the cage.

The Delrin or solid bushings would most likely have higher torque ratings. My figures are the limits given to the factory line employees when they put the OEM rubber bushings on Camaros

As I stated in my original note, there are no torque specs for the factory body bushings.

The delrin bushing upgrade is a different design, there's no need for sleeves.
Perhaps I should've said the 150 was for reference only. I apologize if my wording misled anyone...

Cranked them down to 90lbs., should be good. thanks guys!

Suggestion: check the torque again after ~500 miles.
Whenever I do chassis or suspension work I always re-check the fasteners after a few hundred miles.

I know this is a little bit late, but the 69 Firebird Assembly manual I have shows that the torques for the Rear and mid position bolts should be 75-95 ft lbs (page 064) and 30 to 40 ft lbs (page 189) for the Front (radiator support) bolts.

Not sure why they didn't list the specs in section 2 of the Service Manual which is specifically for body mountings?
I'll have to get a copy of the assembly manual.
Thanks..!

If you go to firebird nation you can download it for free as I had them upload a copy of mine. It had to be uploaded in two pieces but you can combine them if you have adobe acrobat pro. Here is a link to it http://www.firebirdnation.com/forums/topic/526913-69-firebird-assembly-manual/ Not sue if you have to be a member there to access/download it.

Yes I did have to sign up, but that's cool it's an interesting site.
Was able to d/l the manual and a few other informative docs.
Thanks again...

Glad to have helped you out man!