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09-06-2013, 10:26 PM #1
- Join Date
- Sep 2013
1999 GMC Suburban front brake question
Several months ago I changed the brakes and rotors in my 1999 GMC Suburban. I took the calipers off, and used a set of channel locks to slowly compress the piston back in before fitting the new brake pads. Ever since I replaced them, it's felt a little more *spongy* than it used to. It stops just fine, but seems like I have to push "further" than normal, just a little bit. It's such a small difference that I've been driving it and feel safe driving it, I've hauled my trailer through the mountains just fine.
Tonight I was helping my Dad change his front brakes in a 1998 Chevy truck and used the same method, and he said he thought they felt a little more spongy than they used to be.
My question - is this the proper method for changing the front brakes pads (compressing the piston without bleeding the brakes)? Again, it's stopping just fine and I feel safe, it just feels a little different than before.
Thanks for any suggestions.
09-11-2013, 12:29 PM #2
Are you leaving an old pad over the piston when you do this? You run the risk of slipping off the piston and cutting the boot around the piston, which in turn means that you are replacing the caliper. I always use either a c-clamp with a old pad in place and compress the piston or I use the brake caliper compression tool that I have. They are around $15 at harbor freight. I would make sure that your pads are in straight. I have seen pads cocked just a little bit cause a spongy pedal. also make sure the rotor was not cocked at all when installing them. I install a lug nut on a wheel stud and tighten it to hold the rotor in the correct position, then I install the pads and caliper. Next, I pump the brake pedal a few times to squeeze the pads in position against the rotor. Then I remove the lug nut holding the rotor and reinstall the tire.
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