Correct Torque tightening spec 73 front crossmember

[Trench]

I just replaced the rubber isolators on the front crossmember of my 73 RoadRunner, the manual has 2 different torque specs for the bolts. On the diagram is has 50 Ft-Lb and in the step by step instructions it has 80 Ft-Lb. What would be correct?

 

[daytona71]

Just replaced the same on my 73 charger. I went with 50 ft lbs. Will have to check with PST if they have torque specs recommended for their product

 

[Trench]

Thanks daytona71.

 

[idrivemopar]

I did 80 on my 73, because I found at 50, I kept having to retorque, but also not using rubber but using urethane bushings.

 

[Nacho-RT74]

definitelly poly pieces will require a very diff torque specs than stock pieces!!!

 

[YY1]

I'm thinking about installing poly's (i have them but no paperwork), while I have the car n stands and the wheels off.

Any "gotcha's" to watch out for?

 

[Trench]

Here is the latest update on this.
I contacted Energy Suspension and put this question to them. They do not have a tightening spec but said there should be no difference from the factory spec. Since the factory spec has 2 spec's published I went by bolt size. I measured the bolt at .557" and a pitch of 11 and a grade 5. On my chart the closes would be a 9/16-12 which has a torque of 82 ft lbs.
So I am going with 80 ft-lbs.
Thanks for all the input, it was very helpful.

GRADE 5
Coarse Thread
Size Clamp Load Plain Plated
1/2-13 (.500) 9075 76 57 ft lbs.
9/16-12 (.5625) 11625 109 82 ft lbs.
5/8-11 (.625) 14400 150 112 ft lbs.

 

[Trench]

I'm thinking about installing poly's (i have them but no paperwork), while I have the car n stands and the wheels off.

Any "gotcha's" to watch out for?

Make sure you keep track of the spacers so you can put them back to the same location. I had all of the suspension off so it was quite easy to replace them. ES has their instructions for download at http://www.energysuspensionparts.com/installation_instructions/energy_suspension/17262.pdf

 

[73runner]

Poly.... Went with 80.