964rh

Hi

Does anyone know where I can find a walkthrough of how to change the rear discs on my 1990 C4?

Can find one on the fronts but not rears

Thanks

Rob

LeRoux Strydom

The procedure is exaclty the same as the fronts, with a few exceptions: release the handbrake before attempting to remove the disc, and you will need a long (6" or 10 cm) allen head socket (I think 8 or 10mm size, but cannot remember) to reach the caliper bolts, one of which is only accessible through a hole in the rear trailing arm.

Heirsh

The long allen can be done with a simple L wrench stuck in on the long side and a cheater bar on the short side.

Its better with a proper long allen, but, if you dont want to buy one and have an L already, this does work.

LeRoux Strydom

Those allen bolts can become really stuck in there over time. I had a hard time getting one off recently even with the proper tool. There is a danger of rounding the bolt head with a L-tool if the bolt is really stuck, then it's like breaking off your finger inside your a$$hole....

JasonAndreas

Definitely use the proper tool otherwise you won't be able to torque the caliper bolts to 85 Nm (63ft-lb). Also check your emergency brake after installing the new rotors and adjust if necessary.

Heirsh

Thats a good point Jason. I have a funky looking socket that I cut the side out of to torque Allen Keys, but I guess I'm probably the only oddball who does stuff like that.

Another cheap solution, that would still allow you to torque with normal tools, is to take a key and cut it off, putting it in the same size socket.

I had more trouble with the phillips screws holding the rotors on than those. I had to dig (almost literally) for my impact tool. Now thats a handy thing to have at the right times.

jimq

my cheap home made tool and hole that the hex need to fit thru to undo the caliper bolts.

JasonAndreas

On a lathe I turned my wooden closet hanger dowel into a clutch alignment tool...