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front brake spring plate corrosion

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Stephenjk PCGB Member
2020/09/26 19:22:24 (permalink)

front brake spring plate corrosion

Hi,  my spring plates are lifting due to corrosion on my front brakes and the rotors and pads now need replacing.  Has anyone replaced the spring plates as a diy job or it is likely to need a garage?  any tips from someone who has done this?  I'm tempted to try but sounds like I'd be under fair risk of broken bolts and getting myself into trouble!

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daviespaj PCGB Member
Re: front brake spring plate corrosion 2020/09/26 19:50:55 (permalink)
Hi Stephen, I have taken my calipers off as part of a full car restoration. I did get the spring plates out but only a couple of the screws came out using the Allen key. The remainder had to be removed using sharp punch to drive them round and break the initial clamping force. Was not too bad, but made much easier by being in the vice on the bench. Not sure I would want to try this with them on the car?

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vitesse PCGB Member
Re: front brake spring plate corrosion 2020/09/26 22:32:05 (permalink)
I did all 4 calipers on the 964 C2 we owned possibly 8 yrs ago now but removed from car-it wasn't possible on the car.
The mild steel buttonhead setscrews are originally fitted using a threadlock compound which needs to be heated to help release the screws ,that is if the socket heads haven't softened over the years & prove impossible to remove as the Allen key just rounds off the socket.
I used the oft quoted nut method-ie. I plug welded M10 MS nuts onto the capscrews using a MIG welder-the heat helps release the threadlock compound & a spanner easily removes the screws.
If spring plates are re-useable after cleaning ,check & straighten them carefully-clean the calipers of corrosion & repaint with heat resistant paint.
I used stainless steel 316 quality buttonhead Allen setscrews,IIRC,16mm long with plenty of Loctite thread sealant to refit-helps to isolate the 2 different metals
as well as acting as locking agent.

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Stephenjk PCGB Member
Re: front brake spring plate corrosion 2020/09/27 00:00:10 (permalink)
Thank you both, so sounds like it is doable as DIY if I take calipers off and willing to spend the time to get the bolts out.  Good to know on heat and locktight.
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T911UK Guest of the Club
Re: front brake spring plate corrosion 2020/09/27 08:33:31 (permalink)
As mentioned above, heat to break Loctite and a small chisel to break the first turn.
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