Caliper Mounting Bolt Torque Specification

[Moparfiend]

FSM says 50-80 FtLbs. I have the large single cylinder and I assume thats the difference but the FSM only mentions the KH 4 cylinder?

What should the torque spec be on the single cylinder caliper mounting bolts?

Thanks MF

 

[pnora]

FSM says 50-80 FtLbs. I have the large single cylinder and I assume thats the difference but the FSM only mentions the KH 4 cylinder?

What should the torque spec be on the single cylinder caliper mounting bolts?

Thanks MF

View attachment 1805066

What your showing there is a single piston. Says number of pistons 1 each unit. So 50 to 80 is correct.

 

[Moparfiend]

What your showing there is a single piston. Says number of pistons 1 each unit. So 50 to 80 is correct.

Thanks so 80 it is.

 

[R413]

What vehicle are you looking at that the wheels are 14x4.5"

 

[pnora]

What vehicle are you looking at that the wheels are 14x4.5"

He is torquing the caliper mount to knuckle bolts. Not wheels.

 

[R413]

He is torquing the caliper mount to knuckle bolts. Not wheels.

Gee thanks. My question is a valid one. b-bodies don't have 14x4.5" wheels.
Whats this spec book for? ?

FSM says 50-80 FtLbs.

Question stands: What FSM is this manual for?

 

[toolmanmike]

Tight. I would use a long handled 3/8 ratchet. Don't over think it.

 

[pnora]

Gee thanks. My question is a valid one. b-bodies don't have 14x4.5" wheels.



Question stands: What vehicle is this manual for?

I would of assumed it was for his year and model car. But at this point who the fook knows.

 

[Moparfiend]

The manual is for a 1970 bbody satellite (my car). I am not over thinking it. It’s already at 80ftlbs. Done.

 

[pnora]

The manual is for a 1970 bbody satellite (my car). I am not over thinking it. It’s already at 80ftlbs. Done.

Maybe you should be thinking about it. Is it a Mopar factory manual? If not its most likely full of errors and mis-information.. I hate generic Haynes and Chilton manuals.

 

[R413]

@Moparfiend I looked at the 70 Plymouth service manual. The tightening reference part you have there is at the bottom of the 1970 A body with 4 piston fixed caliper section. Those calipers are bolted together thus the "caliper assembly bridge bolts" b-bodies don't have those.

The the floating caliper part starts below that, but it has no tightening specs.

 

[Moparfiend]

Maybe you should be thinking about it. Is it a Mopar factory manual? If not its most likely full of errors and mis-information.. I hate generic Haynes and Chilton manuals.

Hey @pnora I said in the opening first sentence it is an FSM.

 

[Moparfiend]

The only way I can explain the 50-80ftlbs spec is that it’s caliper dependent. So I read the assembly portion but it didn’t specify. It’s a large 1/2”? bolt and can handle 80ftlbs no problem. It’s also the original bolt so its already stretched which means I can go a bit higher. Thats why when @pnora said 80 I ran with it.

 

[R413]

Is that the bolt that holds the caliper bracket to the spindle?

Do you have pin calipers or the slider type.

 

[Moparfiend]

Is that the bolt that holds the caliper bracket to the spindle?

Do you have pin calipers or the slider type.

Caliper to spindle.

 

[RemCharger]

Caliper to spindle.

View attachment 1805102

Caliper bracket to spindle.

 

[pnora]

Hey @pnora I said in the opening first sentence it is an FSM.

View attachment 1805101

When these manuals cover multiple systems you need to read deeper into the assemblies for more information. They tend to make you think but the information usually is there. In your case the knuckle torque is in the repair part along with the pin torque which was not listed. Also the end of the page which you posted with wheel size which triggered responses.

 

[pnora]

Caliper bracket to spindle.

True for the single piston caliper. But the four piston caliper it is Caliper to spindle as there is no adapter.

 

[RemCharger]

True for the single piston caliper. But the four piston caliper it is Caliper to spindle as there is no adapter.

Yes I was referring to post #15.

 

[Unkle Krusty]

Very technical replies.
I am with TMM. But I have a B200 camper van. 2 bolts hold on the large caliper. They were on quite tight. I put the new ones on with the bolts quite tight. They are big bolts, and 80 on mine would be fine. I am going to buy a click type torque wrench real soon. Mine is the bendy bar type.