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Old 06-22-2021, 02:49 PM   #1
jrv6a
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Default Stuck Girling caliper - really stuck

I ended up getting the piston out, but I thought some of you might like seeing this - enjoy.


That's a piece of 3/16 steel to hold the right piston in place. I pumped grease in, and the left piston was so seized that right piston bent the 3/16 plate before the left piston would budge.




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Old 06-22-2021, 03:58 PM   #2
dl242gt
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Nice work getting that thing out.
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Old 06-22-2021, 09:39 PM   #3
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How bad was the bore after you got it out?
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Old 06-23-2021, 03:06 PM   #4
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Right now it's full of a thick sludge of wheel bearing grease, brake fluid, and rust. I threw all of them in a tub of ATF. If there's anything surprising under all of that - like deep pitting or scars - I'll post pics. Right now, I'm just expecting the standard rust that will polish out with 600 paper.
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Old 06-25-2021, 05:15 PM   #5
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Right now, I'm just expecting the standard rust that will polish out with 600 paper.
That would be some pretty high strength 'standard rust'. Pumping grease into the caliper is the safe way of unsticking a piston; but, also the messy way.
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Old 06-26-2021, 09:33 PM   #6
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I use a grease gun with fittings to push out the pistons, shim the gap with steel bars, if one piston comes out it hits the shims OK, then wait for the other one. Clean out the grease, de/grease, sand the rust out, clean, repeat, until clean, if you have a glass bead blaster that will save you time, clean,clean,& clean, then rebuild.
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Old 06-29-2021, 09:13 AM   #7
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That caliper is past its expiration date. No way I'd drive on that, it's scrap.

Buy a new pair of calipers.
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Old 06-30-2021, 01:03 PM   #8
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If it were me I'd source some remanufactured calipers.
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Old 07-01-2021, 09:05 PM   #9
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Meh, the sealing surface is the piston, if those are fine: good to go.
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