New Pads seem too wide?

[slickv8]

I'm trying to fit a new set of Ferodo DS2500 pads and they seem +/- .5mm too tall to fit in the caliper [top to bottom not the width with pad] I'm guessing i need to grind them down a little but anyone else had this issue before i do?

thanks

 

[slickv8]

You could grind the pads, but the problem is almost certainly "plate lift". It's a well documented issue with these calipers. Corrosion between the alloy caliper and the steel plates the pads run in lifts the plates and they "grab" the pads. You get new plates and screws from your local Porsche Centre and do it yourself, or you send the calipers off for a rebuild. Try googling "944 plate lift" for more info.

 

[slickv8]

That makes sense Steve, Thankyou!

 

[Chrishazle]

You'll also finds lots about it on 968 forums - we also have the plate lift problem! Getting the screws that secure the stainless plates out can be a real pig - ISTR they're loctited in, the (?)torx head profile shears easily, and many have had to weld a nut to the screw to get it loose!

 

[wemorgan]

Because the pads are wedged shape (narrow at bottom, wide at top) you can file of some of the ends of the pad backing plate, allowing it to drop down further.

You can also try to fit a junior hacksaw blade between the caliper and shim plate to remove some of the aluminium oxide that has built up.

 

[Hilux]

ORIGINAL: wemorgan

Because the pads are wedged shape (narrow at bottom, wide at top) you can file of some of the ends of the pad backing plate, allowing it to drop down further.

You can also try to fit a junior hacksaw blade between the caliper and shim plate to remove some of the aluminium oxide that has built up.

Exactly - agree entirely

I used an engineers scribe to scrape out a lot of muck, the plates sprung up still but a bit of judicious grinding on the pad edge meant they fitted perfick and went in and out with a bit of sticktion but nothing major.

 

[944 man]

The securing screws are thread-locked, so they need to be heated with a torch in order to get them out without breaking anything. You should fabricate up a thin steel shield to protect the pistons and seals, which can be re-used on every subsequent caliper.


Simon