Posted By: radar
Both front calipers sticking? - 05/06/19 10:28 PM
Howdy
I think I got a handle on this but I dunno it’s always helpful to get another opinion. I haven’t gotten to the bottom of it and I already started throwing $ at the problem.
My bigblock 54 dodge pickup is sitting on a dakota front subframe. Brake wise everything is new from the banjo bolts up- hoses, lines, master. The donor truck had been sitting a year or so but was a runner and had decent looking pads loaded in with a lot of meat on them and the rotors/hubs had a little surface rust but freshly packed bearings with clean grease under the caps. So I didn’t have anything to lose by trying to run them.
Well now a year later I finally got the truck running and both front calipers are sticking applied after using them. I tried loosening the m/c from the booster to see if I had the booster pushrod adjusted out too far not letting the m/c piston return- no dice.
I went to a pepboys that said they had my calipers but when I got under the car I found they sold me two different wrong ones!
I threw new pads on the old calipers hoping that if the caliper pistons were worked in then out again they might free up. No luck there either but they did move in ok with not too much effort on a c clamp. I cracked a bleeder and it didn’t squirt like I would expect if it had a bunch of pressure trapped in there.
So I ordered a new set of calipers off rockauto but I have a nagging feeling it would have to be a bad master cylinder since both sides are doing it? It’s a corvette style master with a line for each front brake right off the master and an adjustable prop valve in the rear line so no factory prop valve to go bad. I don’t mind having new calipers to install but both calipers sticking is fishy.
Any ideas or comments?
Thanks!
Radar
I think I got a handle on this but I dunno it’s always helpful to get another opinion. I haven’t gotten to the bottom of it and I already started throwing $ at the problem.
My bigblock 54 dodge pickup is sitting on a dakota front subframe. Brake wise everything is new from the banjo bolts up- hoses, lines, master. The donor truck had been sitting a year or so but was a runner and had decent looking pads loaded in with a lot of meat on them and the rotors/hubs had a little surface rust but freshly packed bearings with clean grease under the caps. So I didn’t have anything to lose by trying to run them.
Well now a year later I finally got the truck running and both front calipers are sticking applied after using them. I tried loosening the m/c from the booster to see if I had the booster pushrod adjusted out too far not letting the m/c piston return- no dice.
I went to a pepboys that said they had my calipers but when I got under the car I found they sold me two different wrong ones!
I threw new pads on the old calipers hoping that if the caliper pistons were worked in then out again they might free up. No luck there either but they did move in ok with not too much effort on a c clamp. I cracked a bleeder and it didn’t squirt like I would expect if it had a bunch of pressure trapped in there.
So I ordered a new set of calipers off rockauto but I have a nagging feeling it would have to be a bad master cylinder since both sides are doing it? It’s a corvette style master with a line for each front brake right off the master and an adjustable prop valve in the rear line so no factory prop valve to go bad. I don’t mind having new calipers to install but both calipers sticking is fishy.
Any ideas or comments?
Thanks!
Radar