Caliper Selection
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New User
Joined: Jun 2007
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Caliper Selection
I have a 200 F-250 that the right rear caliper has one of the pistons stuck and I need to replace the caliper. The parts store is showing two options. One caliper that has metal pistons and the other with phenolic pistons. The price difference is about $50. I was wondering what other people are replacing the calipers with and what are they having success with?
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
I suppose the resin piston wouldn't corrode as badly, but if you change your fluid out regularly it shouldn't be a problem. I would stick with the metal, phenolic seems to handle heat well enough as carb spacers, but I am not so sure how well they will hold up with heat and pressure.
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
Likes: 20
From: Washington State
I wouldn't think that plastic would corrode at all, ReAX. 
From what I understand, Ford Police Interceptors use phenolic pistons in their calipers to help reduce brake fade. The plastic passes less heat to the fluid. I would imagine those cars are subject (at times) to lots of heat and pressure.
From what I understand, Ford Police Interceptors use phenolic pistons in their calipers to help reduce brake fade. The plastic passes less heat to the fluid. I would imagine those cars are subject (at times) to lots of heat and pressure.
Fleet Mechanic
Joined: Apr 2007
Posts: 1,433
Likes: 7
From: NH
Phenolic, Depending on how it is manufactured can withstand very high temperatures and can have a high mechanical strength. Again it depends on how and who manufactures it. If implemented on the brake calipers i would like to think it should be better than the metal ones.
Tacohead, what was the cheaper one?
Tacohead, what was the cheaper one?
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