I'm just replacing front disc calipers, master cylinder, and the dust guards.
Having now painted the dust guards and tried to fit them using the original M7x12 and 2 M7x20 bolts each side, I have managed to strip one bolt and strip the thread in the steering knuckle on the other side while trying to torque to 36lb ft. as per the Haynes and Autodata books.
When I removed the guards again, they are really 'squashed' the metal around the mounting holes...
I have since found reference to two (or three!) tightening torques for bolts in various places on the net;-
Front Wheel Brakes
Backing plate to steering knuckle bolt (36)
Splash shield to steering knuckle bolt (7)
Caliper housing screw (14 - 18 )
Cylinder to backing plate bolt (18 )
Caliper to steering knuckle bolt (29)
Bleeder Valve in cylinder/ caliper (3.5 Max)
Hose to cylinder/ caliper (11 - 14)
Screw for clamp nut (7 - 9 Max)
Now not being a genius, but I'm sure there is only one plate that is bolted to the steering knuckle... so my question is what is the correct torque?
There is mention above of a 'backing plate' at 36lb ft, as well as a 'dust shield' at a much lower 7lb ft. (I have also seen this quoted as 14lb ft?)
What is the difference between a backing plate and a dust shield - there can only be one fitted?!? (unless I'm missing something `¬)
I did wonder if there is confusion between a 'backing plate' used with front drums and a 'dust shield' used with front discs.
Any info would be good, as I do not want to strip any more threads, but need to ensure I've got it right!
P.S. is the two pin brake light switch on the m/c supposed to be normally closed or normally open - mine is normally closed and am assuming it needs replacing... unfortunately I have already removed the master cylinder, so cannot test it (I should have done that first I know...)
P.P.S the caliper mounting bolts are only 29lb ft in comparison!