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Old 09-08-2019, 06:48 PM
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calipers seizing

A while back, i smelled asbestos cruising down the road, pulled over, and realized my right caliper was gripping (i had felt a slight pull, and wondered). I assumed it was the soft brake line lining collapsing, and "pinching" the caliper shut, which has happened on another vehicle. I replaced both soft brake lines, and the master cylinder, and today i noticed a slight pull to the LEFT, and felt my left from wheel...it was hot to the touch, from the brakes gripping. WTH?

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Old 09-08-2019, 06:53 PM
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A while back, i smelled asbestos cruising down the road, pulled over, and realized my right caliper was gripping (i had felt a slight pull, and wondered). I assumed it was the soft brake line lining collapsing, and "pinching" the caliper shut, which has happened on another vehicle. I replaced both soft brake lines, and the master cylinder, and today i noticed a slight pull to the LEFT, and felt my left from wheel...it was hot to the touch, from the brakes gripping. WTH?
i meant...left from wheel

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Old 09-08-2019, 06:54 PM
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i meant...left from wheel
WOW!!! i can't except that i need glasses... LEFT FRONT WHEEL.
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Old 09-08-2019, 06:55 PM   #4
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There could be a bit of crap from the hose breaking down internally found its way into the caliper causing it to stick.
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Old 09-08-2019, 07:23 PM   #5
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Use an instant read laser thermometer aimed at each wheel.

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Old 09-08-2019, 09:37 PM   #6
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A few things come to mind.
1- caliper bolts are worn or frozen
2- Pucks are worn or frozen
3- springs and/or bushings worn or broken

If your budget is tight, I suggest you disassemble one side or the other and discover what might be wrong.
For me, I'd simply buy two re-man calipers for $32.00 each and install them. I'd probably also buy whatever hardware holds them in place, just to save a second trip to the store.

Good Luck, L.M.
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Old 09-08-2019, 09:58 PM   #7
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Just replace the calipers... this is a common issue... I think I payed $19 each for the last set I bought
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Old 09-09-2019, 06:42 AM
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ok, you all have a point. whether crud,, wear, etc., i'll never relax about this unless I start fresh. New (reman) calipers, pads, and move on. Thanks!
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Old 09-09-2019, 07:02 AM   #9
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Quote:
Originally Posted by 68whaler View Post
A while back, i smelled asbestos cruising down the road, pulled over, and realized my right caliper was gripping (i had felt a slight pull, and wondered). I assumed it was the soft brake line lining collapsing, and "pinching" the caliper shut, which has happened on another vehicle. I replaced both soft brake lines, and the master cylinder, and today i noticed a slight pull to the LEFT, and felt my left from wheel...it was hot to the touch, from the brakes gripping. WTH?

I just replaced both L & R calipers for the same reason. Napa has them (with metal piston) for $37.49 that come with support hardware, then you get a core replacement for $37.03 each when you bring the old ones back. It's a no brainer for an investment of 92c.

"CAL SE4891S" & "CAL SE4890S"

Get good pads and rotors too while you're at it and you'll be set for a long time.
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Old 09-09-2019, 11:26 AM   #10
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Get good pads and rotors too while you're at it and you'll be set for a long time.
I'd do the same thing. I didn't mention the pads & rotors because we were talking about the calipers.
But yes, spend the money, do a complete job once, and then you don't have to worry about it for a long time. OP already replaced the brake hoses, so if he does the calipers, pads and rotors all at the same time he can go on to concentrate on the next thing that breaks. It's an old Jeep. Something else is bound to let go soon.

Good Luck, L.M.
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Old 09-10-2019, 06:19 AM
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amen to that... i need to get this right before the next thing starts breaking. And I'll check out napa for sure! Still mid-nineties in south Georgia...hoping to wait for the weather to break.
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Old 09-11-2019, 08:50 PM   #12
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I just replaced both L & R calipers for the same reason. Napa has them (with metal piston) for $37.49 that come with support hardware, then you get a core replacement for $37.03 each when you bring the old ones back. It's a no brainer for an investment of 92c.

"CAL SE4891S" & "CAL SE4890S"

Get good pads and rotors too while you're at it and you'll be set for a long time.
I just looked up those part numbers from Napa and it says they are phenolic pistons.

https://www.napaonline.com/en/p/SEBSE4891
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Old 09-12-2019, 05:07 AM   #13
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I just looked up those part numbers from Napa and it says they are phenolic pistons.

https://www.napaonline.com/en/p/SEBSE4891
Double check the part # again, you don't have an "S" in the part number in your link, the designation for steel. Also the price is different than the ones I mentioned, that steel piston adds a lot to the total price lol (but it's totally worth it IMO).


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Old 09-12-2019, 11:07 AM   #14
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There was some discussion here recently about steel caliper pistons vs. phenolic caliper pistons.
One poster made the point that phenolic pistons are lighter and won't rust.
Just how strong do they need to be? Does anyone know of any first hand instances of the phenolic pistons failing?
Google the word "phenolic" for some good information. You can make up your own mind.

Good Luck, L.M.
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1987 YJ-4.2L-Standard Shift- Re-manufactured Carter Carb-2" body Lift-31X10.5X15 BFG KOs-190K Miles No back seat.
HEI distributor with computer and all related relays and wiring removed.
12K Badlands winch with dual batteries.
Warn front bumper. Matching imitation Warn bumper on the rear.
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Old 09-12-2019, 11:20 AM   #15
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Quote:
Originally Posted by Luckymac View Post
There was some discussion here recently about steel caliper pistons vs. phenolic caliper pistons.
One poster made the point that phenolic pistons are lighter and won't rust.
Just how strong do they need to be? Does anyone know of any first hand instances of the phenolic pistons failing?
Google the word "phenolic" for some good information. You can make up your own mind.

Good Luck, L.M.
If it's lightweight and wont rust it doesn't fit the Jeep design-concept lol.
Got it at last likes this.
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Old 09-12-2019, 01:24 PM   #16
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My 10,000 lb diesel dually has phenolic pistons in the front calipers and I often tow w gross weight of OVER 30,000 lbs..... yeah those'll never hold up on a jeep

Fwiw, I got 100,000 miles and counting out of the last set I installed
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Old 09-12-2019, 04:35 PM   #17
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Mine (steel) finally seized after 120,000+ miles / 15 years. But like LuckyMac said, the Internet will forever have an on-going opinion about either option. Maybe you could get the left caliper in steel and the right caliper in phenolic lol. Then 15 years from now you can get back to us lol. Either option will work great for you though I'm sure of.
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Old 09-13-2019, 06:21 AM
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defcon, that's pretty funny! I think I'll buy whatever napa has in stock, grease them properly, and not be surprised either way if i'm doing it again in 8 to 10 years. Assuming that my jeep still possesses enough metal to even require brakes then.
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