Replacing rear pads and adjusting park brake, downloaded FSM from techinfo site says 26NM torque (20 ft/lb) for the mounting bolts for the caliper, normal specs from Toyota standard bolt tension specs show the same bolt should be 59NM minimum for 5T grade.............something is not right.........anyone have a FSM with the bolt torque for the rear caliper saying something like 59 NM or above?
HELP NOW! Rear Brake caliper bolt torque, FSM not correct, 12 x 1.25 torque (1 Viewer)
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- Thread starter
- #3
Well maybe I am reading the manual wrong, I have just found another part that specifies the same tension, but it specifies the brake caliper slide bolts, so maybe the main caliper bolts are somewhere hidden elsewhere?
Caliper bolts get 20 ft lbs. 26 Nm
Torque Plate gets 76ft. lbs. 103 Nm
The caliper is connected to the torque plate, ie if you take the torque plate off the caliper comes with it. I had those two parts confused when I did my rear brakes for the first time.
Mine has held strong with this amount of torque for nearly 20,000 miles.
Torque Plate gets 76ft. lbs. 103 Nm
The caliper is connected to the torque plate, ie if you take the torque plate off the caliper comes with it. I had those two parts confused when I did my rear brakes for the first time.
Mine has held strong with this amount of torque for nearly 20,000 miles.
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Jim_Chow
V8_Fan
Caliper bolts are the little 12mm bolts. You might need an open-ended wrench to prevent the inner portion from turning when loosening it. Torque plate bolts are the much larger ones that attach the caliper base to the vehicle (either 14mm or 17mm, can't remember)
- Thread starter
- #6
Thanks Travis351,
I put it all back together last night, I will now get under there and crank them up to 103 Nm.
Thanks for your reply too Jim, the torque plate bolts are 12 x 1.25, the big ones, the caliper bolts are probably 6mm. This is the thread size, 12mm x 1.25 pitch. Bolts can have many different head sizes for the same thread size.
Trunk Monkey
Moderator
Not the OEM bolts. They're 10, 12, 14, 17, 19, 21, 24 and 54. That's about it.
- Thread starter
- #8
Well yes this may be they case in general, although 22mm seems to be missing, not sure about others.
However, when torquing bolts up to spec, the thread size, thread pitch and tensile stregth of the bolt come into play, not the spanner or socket size.
Whenever specifying bolts you always specify the thread size and pitch (or thread type) and strength.
I expect you may find some Toyota OEM bolts, particularlly cylinder head bolts, that take a small multi hex socket which is approximately the same size as the thread diameter. Yes these are special, but you may find others on the vehicle which are also "not the norm". Also with people doing mods to vehicles and changing parts/shocks etc, many different spanner sizes will fit the same thread sizes.
So there isn't much point in asking what torque to do up a 14mm bolt if you really have a 10mm x 1.25 pitch bolt with a 14mm head.
This bolt comes in 8 different tensile strengths with a specified torque setting of 25 Nm for low grade to 87 Nm for the highest grade.
Jim_Chow
V8_Fan
I was referring to the socket size needed to torque the bolt. Most bolts head sizes on the car are 10, 12, 14, or 17. Lug nuts are 22mm. Not sure what is 21mm? I know the 3 lugnuts for my kaymar rear tire carrier are 21mm, the screws/bolts that fasten the oval-shaped plastic cover over the engine oil drain bolt are 8mm.
