944S2 caliper corrosion

[grezman]

Hello all. Had to replace discs & pads for MOT. Easy, or so I thought. Managed to get the old pads out but the only way new ones are going in is with a hammer. Something not quite right. Closer inspection reveals the old pads had the backing plates ground down to allow them to fit. I believe the problem is corrosion between the shim plates & caliper. I have threatened the retaining screws but I reckon they're in for keeps. Any suggestions gratefully received. Ta. Graham

[HAB]

Uh-oh, sounds like caliper plate lift to me, 944 turbos/S2 and 964's can all suffer from it,the grinding down you mention is the classic botch to get the pads to fit.

If your getting this fixed at an independent, it can cost ££££, due to it been pretty labour intensive.

Oh and btw,welcome to PH!

Edited by HAB on Wednesday 9th August 23:10

[diver944]

New plates are about £30 a calliper from Porsche. JZMachtech charge around £100 to do it for you (including plates) and Promax charge £175 for a completely rebuilt calliper with new plates, seals, nipples and a fresh coat of paint.

You can do it yourself with the callipers off the car, but its getting the retaining bolts out that is the problem. They should be Locktighted in place and a fair amount of heat is the only way to loosen them

[aasc]

Check the classified here - I think there's a set of calipers for sale right now (not mine).

[wildoliver]

yes and the calipers for sale are the correct style for a 944.

[968csreading]

I have had the rears done on mine and it took 2-3hrs per corner to fix them. The main problem was getting the bolts out.

[apusmelba]

the corrosion is from the alloy caliper and it distorts the stainless carrier plates however it is quite easy to remove by sliding a thin jigsaw blade between the caliper and the plate and sawing parallel to the plate as the corrosion is soft/ soaking with wd40 and a high pressure air gun are usefull too and when the corrosion is removed the plates will expand to allow standard size pads to work ok allow approx 30 mins per caliper insitu and only 5 mins next time i did this about six years ago before i read the more expensive options and my calipers work fine and get checked/cleaned each pre mot checkover