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Pulling Right While Braking. Caliper Sticking? K1500

Paveltolz

Доверяй, но проверяй
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Saratoga Springs, UT
Last fall I replaced front rotors and pads with AutoZone Duralast parts. There was seemingly a bit more life to the old pads and the rotors weren’t cut like rings of Saturn or anything but, I wasn’t happy with the way it was stopping. Wasn’t pulling per se, but, the performance wasn’t what it was.

Did fresh brake fluid exchange a couple of years ago as it was looking like ‘Shrek Piss.’ Regardless, brake pedal isn’t like GMT-800’s w/ four wheel disks, never was despite power steering pump replacements, stainless vs. ruby lines at the wheels…I digress.

While doing the work, I did a thorough cleaning of the calipers, ensured the contact points the pads rested/slide on were free of built up brake dust (of which there was a lot), greased the guid pins, etc.

Odd thing with these new pads and rotors though was I needed to ‘run in’ these rotors as the pads were dragging enough to sing to me all down the roads. The scrape, scrape, scrape sound would go away and come back with a vengeance. Never had that with previous part swaps. When I got home I checked rotor temps and they weren’t hot at all, about 90*. My home is at the top of a hill so for about a mile, the brakes don’t really get used but, they were audible all the way up. Odd. Did what a few sites and videos suggested for running them in and, afterwards, all seemed right to the world.

In January I was visiting my buddy in AZ and after returning from a family dinner he asked if I had a brake dragging as he thought he smelled hot brakes. I didn’t notice anything and we both did a good smell test around the truck. Slight breeze blowing and we didn’t notice anything on toward. My fuel mileage wasn’t suffering and, at the time, there was no pulling issues etc. I didn’t touch anything but, did get my finger tips close and didn’t notice one side hotter than the other.

Mid-February I noticed the truck was starting to guide right a little under braking. At first I hoped it might be road crown or grade for run off but, same roads I always drive and at every light and the issue was starting to get a little worse. It is now to the point that I have to get it things corrected. It doesn’t change lanes on slight braking or anything but, it definitely wants to go right every time I do slow down. Worse under hard braking.

I’ll raise the front and compare wheel spin, any dragging sounds and tap the brakes to compare. I’ve already ordered “new” calipers though. Probably should take the heat gun and go for a drive first and check things out before driving it home (I can’t seem to remember to check when I drive in cause, I’m not really using the brakes that last mile). It just finished snowing so I’ll have to wait for all the Utah-rd drivers to get their wrecks cleared before I can test drive it though.

This and a leaking rear output shaft seal…another story/thread.
 
When using a temp gun, understand you can NOT yet good readings from the shiny surface of the rotor face due to emmisivity variance.
Shoot the edge of the rotor.

Remember to check rear brakes. Although less common it can cause it too.

As to our friend from Ohio- yuppers. These are old trucks now (30 years is more than enough)… don’t be afraid to put on a new set of hoses to keep things safe and working smooth.

On any pad/rotor shoe/drum change you always get better braking performance and longer life from the components if you go through a burnishing procedure.
I do that as my “test drive”.
 
My rear brakes need looking at too since its been 15 years…
Understand about the Temp Gun. Shooting the outer edge (rust belt) of the rotor (dark meat). Honestly, the difference is only ~two degrees from the shiny side. Well within any of the gun’s margin of error

Did a short test drive after warming everything up. After five hard steps from 35-40mph:
Left/Driver side: 134* Seems it should have been much hotter.
Right/Drinker/ Passenger side: 250* Seems more normal.

I would almost condemn the left side caliper if this was the sole test.

Next test was to let the truck roll down a fair grade, using engine braking to control speed and the e-brake to bring it to a halt. Idea is to not use the front brakes to slow / stop. Check temps again to see if it’s dragging on the right side or not.
Left side: 41* at start of the roll. 39* at the end.
Right side: 42* at start of the roll. Also 39* at the end.

Calipers not dragging.
 
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