I know that it is not recommended to split the two halves of a brake caliper, but I have a set which have been split. Can anyone tell me what the correct torque is to retighten the bolts of the two halves? I have been told that the torque on the bolts differ to each other (not all the same torque).
LJ brake calipers
#1
Posted 06 October 2015 - 11:06 AM
#2 _Bomber Watson_
Posted 06 October 2015 - 12:15 PM
I will check the shop manual when I get home tonight unless someone beats me to it.
#3
Posted 06 October 2015 - 01:39 PM
I think its because they are torqued at the factory and the torque required might be very high concidering the forces acting on the two halves under extreme braking.
#4 _Bomber Watson_
Posted 06 October 2015 - 02:09 PM
80ft/lb sounds familiar but I will check.
#5
Posted 06 October 2015 - 06:06 PM
I had mine split, and a spacer inserted so they would fit over the correct thickness rotors...
(and yes, they had probably been replaced some years back with the wrong ones)
#6
Posted 06 October 2015 - 08:56 PM
#7
Posted 06 October 2015 - 09:22 PM
Tight... fkn tight
Thats the technical spec
#8 _Bomber Watson_
Posted 06 October 2015 - 09:23 PM
Just checked multiple different shop manuals, Genuine GM HK, LC, LJ supplement, and a gregories LJ one, none of them listed the torque speck.
Was sure I found it somewhere, but musta just guessed it.
Just get a half decent breaker bar on there and do her up proper. Put a bit of red loctite on the threads. Then go drink beer.
Cheers.
#9
Posted 06 October 2015 - 09:56 PM
Just checked multiple different shop manuals, Genuine GM HK, LC, LJ supplement, and a gregories LJ one, none of them listed the torque speck.
Was sure I found it somewhere, but musta just guessed it.
Just get a half decent breaker bar on there and do her up proper. Put a bit of red loctite on the threads. Then go drink beer.
Cheers.
DJ, it was discussed in a thread about 4 or 5 years ago. Someone asked the same question.
From memory 70 to 80 ft lb is the general consensus. Same torque for all 4 bolts on each caliper.
I did mine up to 70ft lb and have had no problems or issues.
#10
Posted 08 October 2015 - 03:04 PM
I recently found some info stating that the standard torque for 3/8" unf bolts is 50 ft lb. Do you thing this is enough as they don't look like high tensile bolts.
#11
Posted 08 October 2015 - 05:30 PM
I recently found some info stating that the standard torque for 3/8" unf bolts is 50 ft lb. Do you thing this is enough as they don't look like high tensile bolts.
AFAIK The original bolts are HT.
#12
Posted 08 October 2015 - 05:46 PM
Hi
Pehaps the reason for no torque figure given?
From the good book :
Attached Files
#13
Posted 08 October 2015 - 05:55 PM
#14
Posted 08 October 2015 - 06:02 PM
Where did you find that extract Bazza. It's something I saw years ago. So should they be separated or not. What do you think?
#15 _Bomber Watson_
Posted 08 October 2015 - 07:10 PM
Its in the factory manual TMK.
Rules are made to be broken.
I doubt when they released the manual they expected people to still be playing with these vehicles 45 years later.
Cheers.
Edited by Bomber Watson, 08 October 2015 - 07:10 PM.
#16
Posted 08 October 2015 - 07:21 PM
Where did you find that extract Bazza. It's something I saw years ago. So should they be separated or not. What do you think?
Hi
The official LC Workshop Manual. It seems odd that they didn't even want Holden dealership mechanics dividing the part - but as others have said , it appears that it can be done successfully.
Cheers
Bazza
#17
Posted 08 October 2015 - 07:24 PM
Hi
Perhaps the reason for no torque figure given?
From the good book :
Learn something new every day.
Which shop manual is that in Bazza?
Don't believe I've seen it in the LC workshop manual.
Cheers
Dave.
edit: I'll have to get the good book out and find that paragraph.
Edited by S pack, 08 October 2015 - 07:26 PM.
#18
Posted 08 October 2015 - 07:52 PM
Hi
It's under "Disc Brakes" 5C8 at the bottom of the page.
Cheers
Bazza
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