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What Are These On My Caliper Pistons? #5356698 02/21/20 06:37 PM
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Fitz98 Offline OP
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I got a rebuilt caliper for my 98 Expedition today from AZ.
This is the first I have seen these plates clipped into the pistons on Expedition calipers.
I removed them, but not sure why they were there in the first place. Any ideas and are they important? I am thinking they may just be a decoration to hide the pits in the face of the reused piston during the rebuild and make them look more like new.
[Linked Image]

Re: What Are These On My Caliper Pistons? [Re: Fitz98] #5356702 02/21/20 06:41 PM
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Trav Offline
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To hide the crappy looking used pistons.


ASE L1, Master. Deutsch Meisterbrief.
Re: What Are These On My Caliper Pistons? [Re: Fitz98] #5356707 02/21/20 06:47 PM
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mk378 Offline
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My guess is they're supposed to act like a backing plate to deter squeaking.

How many new threads are we going to get about this brake job?

Re: What Are These On My Caliper Pistons? [Re: Fitz98] #5356709 02/21/20 06:50 PM
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Re: What Are These On My Caliper Pistons? [Re: Trav] #5356726 02/21/20 07:13 PM
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demarpaint Offline
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Originally Posted by Trav
To hide the crappy looking used pistons.

That sums it up, and maybe quiet things down a bit.


God Bless Our Troops

Re: What Are These On My Caliper Pistons? [Re: Fitz98] #5356743 02/21/20 07:38 PM
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Trav Offline
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Not present on brand new calipers.

[Linked Image]


ASE L1, Master. Deutsch Meisterbrief.
Re: What Are These On My Caliper Pistons? [Re: Trav] #5356761 02/21/20 08:03 PM
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maxdustington Offline
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Originally Posted by Trav
To hide the crappy looking used pistons.
shocked2 Must have found those on the bottom of the Yangtze!


99 Toyota Tercel CE 5EFE/C151
PUP 5W30/Ultra
Re: What Are These On My Caliper Pistons? [Re: maxdustington] #5356767 02/21/20 08:06 PM
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Trav Offline
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Probably Cardone.


ASE L1, Master. Deutsch Meisterbrief.
Re: What Are These On My Caliper Pistons? [Re: mk378] #5356775 02/21/20 08:22 PM
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Fitz98 Offline OP
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Originally Posted by mk378


How many new threads are we going to get about this brake job?

Sorry, not sure about posting protocol. I am not happy to have had so many different questions about an otherwise pretty straight forward brake job either. I just thought different topic, different thread, regardless of job. I would have thought the people who have the knowledge to reply to the post would not be revisiting a previous post that they already made input to.
If protocol is to make one post for a single job, regardless of the topic, then I will consolidate in the future. Thanks for bringing it to my attention

Re: What Are These On My Caliper Pistons? [Re: Fitz98] #5356782 02/21/20 08:33 PM
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Fitz98 Offline OP
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Yeah, they are some crappy looking pistons. I hope the seal surfaces are better than the pad contact face.
I would hope there are some decent standards for parts that are reused for caliper rebuilds.
They are Duralast.

Re: What Are These On My Caliper Pistons? [Re: Fitz98] #5356786 02/21/20 08:38 PM
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03s Offline
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To protect them during shipping, which obviously isn't needed.


2005 Chevrolet Optra
Quaker State High Mileage Synthetic 5W30 Fram Tough Guard TG3387A

Re: What Are These On My Caliper Pistons [Re: Fitz98] #5356806 02/21/20 09:07 PM
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NRS brakepads use those rings to quiet brake noise.

Last edited by Vercingetorix; 02/21/20 09:08 PM.
Re: What Are These On My Caliper Pistons [Re: Fitz98] #5356813 02/21/20 09:16 PM
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Re: What Are These On My Caliper Pistons [Re: Fitz98] #5356846 02/21/20 10:09 PM
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Fitz98 Offline OP
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My master cylinder emptied while changing a caliper. I actually put my hose in a container while taking my old caliper to the store for replacement and when I got back, it was pretty much empty.
I plan to flush and bleed my 2 front calipers and lines anyways and was planning to flush the rear lines while I was at it. Since the master cylinder is empty, do I need to bleed the master cylinder independently first, or will it bleed itself while pushing fluid through the lines during a flush?

Re: What Are These On My Caliper Pistons [Re: atikovi] #5358686 02/24/20 08:42 AM
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Originally Posted by atikovi

That would be my guess .


Wyr
God bless
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