ot: Jeep caliper stuck?

wfw

Member
about a year ago I changed both calipers on the rear of my 2004 jeep grand cherokee. got
remanufactored ones from Advance auto. now the one on the passenger side has stuck. could
it be anything else causing it to stick? I will have to remove it and take it back to them
for replacement. just needed to know if I need to check anything else before I take this
one back for replacement. Thanks!

Frank
 
If it has a rubber line going to it that can go bad and block the flow of the fluid and do the same thing as a sticking caliper can do
 
if the sliders are freezing up, did you lube them with silicone grease when they were installed?
 
do a quick bleed on that caliper and you should be able to tell if the fluid's flowing ok to/from it.


If the line's ok - and the slide areas are ok - I'd just yank the caliper and check out the piston. If the rubber protector is ripped, that's probably your problem.

If that's ok, could just be bad luck - but replacing the fluid is never a bad idea, esspecially if it's like most other vehicles where it's never changed. It can absorbed water which can cause corrosion internally.
 
If its a rear caliper with integral parking brake be sure the cable or caliper lever isn't hanging up.
 
"old" has the answer... the hose to that caliper may have collapsed inward on itself causing backpressure so the caliper can't retract.

Before condemning the caliper, loosen it's bleeder and see if there's retained pressure caused by a bad hose.
 
I had the flex brake line cause calipers on Chrysler products to cause calipers to stick on more than one occausion.
 
I'll second the possibility of it being the flexible line. An intermittent sticking caliper on my Jeep confused me and my mechanic for a bit, before we finally figured out it wasn't the caliper itself at all. New line finally fixed it.
 
Could be a number of things,, If I replace a caliper it gets a hose I rarely replace one so it will get a new hose at the wheels and if on the rear a new center hose also..

You could pop the old one apart and determine the cause as there are numerous causes... My arse draws up in a knot when replacing brake pads with Aluminum calipers... I never push a caliper back unless I install a clear hose on the bleeder and dump the fluid in a container if the fluid is black the caliper needs to be replaced are rebuilt... No amount of bleeding are flushing will remove the contamination it has to dissembled...

I can go for a long time then it seams I hit on a caliper that will stick after a brake job I use to go on how it felt when I pushed the piston back I still do but now use the condition of the fluid as a indicator also... Chevy trucks are the worst for this... :twisted:

I have also had a few bad rebuilt calipers right out of the box... I chuck'em up in a vice, install a wood block in it to simulate the pads and rotor ( You only need the piston to move 1/8" no more than 1/4") and apply air pressure once I relieve the pressure it should be able to remove the block EZ are be able to push the piston back in with my hands if its stuck are I have to pry the piston back I get another... Also pull the slide pins and lube/re lube I have found them dry are lacking enough lube ...

Thin rotors will also cause a piston to stick/cock in its bore :wink: Its a EZ check to confirm a bad hose if the caliper is stuck open the bleeder it it frees it up your issue is upstream of the caliper.... If it stays stuck piston are caliper mounts could be the issue... There are certain piston materials that seem to be worst than other also... I want to go back to the black fluid its a sign sum'N is not right it ether has been over heated are some type of chemical reaction its more evident when it has aluminum brake calipers... I have started taking the reservoirs off the master and giving them a good cleaning also as some you can not clean unless you remove them...

There are no $99 brake jobs performed in my shop if I am going to marry it you will have to bless it with your pocket book... :D

Once you get it repaired I would have the system flushed by someone with the proper brake flush equipment I have a BG PF7 machine it does a very good job...

https://www.bgprod.com/catalog/brakes/bg-pf7-brake-service-system/
 
Along with what everyone has said about hoses. Some have mounting brackets attached to the hose . I have seen rust build up and pinch hose .
 

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