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Old 10-16-2019, 09:51 PM   #1 (permalink)
ShopSpecialties
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Sticky Calipers ?

I noticed the steering wheel was starting to be lil left while driving. So today I jacked up the front and the left front wheel had some resistance. First thing I check is caliper bolts and pad slide. The grease was thin on the bolts but zero corrosion. So fresh grease and back in and the pads slide freely without the caliper. I open the bleeder and fluid does not shoot out so I assume the hose is good. Remove the brake hose and push the plungers in to expel all the old fluid. Bleed and refill with fresh fluid so hopefully it is good.

I am wondering if I should just replace them ?

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Old 10-16-2019, 10:38 PM   #2 (permalink)
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Quote:
Originally Posted by ShopSpecialties View Post
I noticed the steering wheel was starting to be lil left while driving. So today I jacked up the front and the left front wheel had some resistance. First thing I check is caliper bolts and pad slide. The grease was thin on the bolts but zero corrosion. So fresh grease and back in and the pads slide freely without the caliper. I open the bleeder and fluid does not shoot out so I assume the hose is good. Remove the brake hose and push the plungers in to expel all the old fluid. Bleed and refill with fresh fluid so hopefully it is good.

I am wondering if I should just replace them ?
Hit them with the temp gun after driving, if one is sticking it will be higher temp. I just had one on my 06 do that, piston was rusted and sticking.

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Old 10-16-2019, 10:59 PM   #3 (permalink)
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I should have a temp gun in the van somewhere. I usually have to pull over at least a couple times a trip to practice my snake wrangling so might as well check temps also.
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2006 Chevy Express 1 Ton Ext Duramax, EFILive. Edge Insight CTS.Throttle Down Kustoms Bumper.TCI Deep Pan. Fumoto valve. Diamond Eye 4" Turbo Back Exhaust BYE BYE Kitty and Ruffler. B&M Supercooler. AEM dry filter with custom air intake made by yours truly. PCV Re-Route. Diamond Eye turbo direct pipe. Kennedy lift pump. EGR valve and cooler delete. Trex-Tech Up pipes. Batmowheel. Turbo Performance Products turbo sock. Setrab fanpack fuel cooler. Jw Speaker headlights.



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Old 10-17-2019, 01:20 PM   #4 (permalink)
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Only 50 miles in on a 500 mile day and the left side is already 20*+ hotter. I am not going to chance getting stranded so back home I go.

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Old 10-17-2019, 02:21 PM   #5 (permalink)
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I am really disappointed in the quality of GM replacement parts. I replaced the original calipers at 340,000 with no sticking issues and these only have 115,000 miles and need replaced. Even the quality of the bleeder screw is crap where no wrench fits it well. Between the leaf springs and now these calipers GM must be whoring it out to the lowest bidder. There is a significant difference between the original parts that came on the van to new replacement GM parts that are suppose to be the same.
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Old 10-17-2019, 06:23 PM   #6 (permalink)
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I've got 15 of the pickups at any one time. Done more than my share of brake jobs, and, never a caliper for a sticking piston. We're in the rust belt and blenders tend to rust solid and, of course the slides and pad brackets.

At 13 years old, I'm more inclined to blame the rubber hose, or the choice of grease on the slides.
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Old 10-17-2019, 06:39 PM   #7 (permalink)
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Hoses were changed last time and they have not been pinched or anything. If the hose was not allowing fluid to return to the master then fluid should shoot out under pressure when the bleeder is opened. CRC synthetic brake & caliper grease is the same stuff I have used for years with no issues.

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Old 10-17-2019, 10:08 PM   #8 (permalink)
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Have you mounted the caliper without the pads to verify free sliding?

I started having issues using the CRC grease with my aggressive drivers. Seems the heat causes it to soften the rubber.
I've been using 3m silicone caliper grease ever since.
And, the aftermarket rubber boots and bore insert are of a different material than the acdelco ones. Aftermarket ones tend to gum up faster, especially with the CRC gresse
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Old 10-17-2019, 10:26 PM   #9 (permalink)
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Caliper slides freely. I had used Ac Delco boots and inserts. I do not ride my brakes and the grease did not gum up after 3 years and 115,000 miles.
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2006 Chevy Express 1 Ton Ext Duramax, EFILive. Edge Insight CTS.Throttle Down Kustoms Bumper.TCI Deep Pan. Fumoto valve. Diamond Eye 4" Turbo Back Exhaust BYE BYE Kitty and Ruffler. B&M Supercooler. AEM dry filter with custom air intake made by yours truly. PCV Re-Route. Diamond Eye turbo direct pipe. Kennedy lift pump. EGR valve and cooler delete. Trex-Tech Up pipes. Batmowheel. Turbo Performance Products turbo sock. Setrab fanpack fuel cooler. Jw Speaker headlights.



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Old 10-17-2019, 10:50 PM   #10 (permalink)
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Quote:
Originally Posted by heymccall View Post
I've got 15 of the pickups at any one time. Done more than my share of brake jobs, and, never a caliper for a sticking piston. We're in the rust belt and blenders tend to rust solid and, of course the slides and pad brackets.

At 13 years old, I'm more inclined to blame the rubber hose, or the choice of grease on the slides.
The caliper I just changed one piston was so rusted I could hardly compress it, it was an original so I canít complain.

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