Matt16

I just replaced my front pads and had to use a bit of force to push a few of the brake pistons into their cylinders. I tapped this particular pad in with a mallet. Now the front passenger's side is dragging. I can turn it, though its rather stiff.

How to I fix this on the cheap (ie: new calipers are not an option)?. Can I just force the piston farther back into the cylinder to free up some range of motion?

waskillywabbit

iTrader: (-1)

Sticking calipers usually means the piston/cylinder wall is malled or rusted.

Sounds like some new calipers are in your future or is stopping not an option?

jason191918

Did you take off the MC cap and take out some fluid?

highway

new caliper, rebuild kit or salvage yard.

blacklabel

since your front brakes are non-abs, just remove the cap from the master cylinder, and use a C-clamp to apply pressure to fully press the piston back into the caliper.

the caliper by design is very simple, so if the piston will not release fully then you'll need to replace the caliper.

Matt16

Shopping is not an option. I noticed a little more wear on the pad from the passengers side, so this isn't exactly a new problem.

blacklabel

the brake system is NOT something I would cheap out on. you can get a rebuild kit for cheap and just replace the seals in the caliper yourself.

the square cut seal around the caliper piston is what causes the piston to return after brake application.

the caliper piston will only have 2 rubber seals. you blow the piston out with compressed air through the fluid port, replace seals, re-assemble. simple.

brake drag = excess heat = brake fade
brake drag = excess friction = loss mpg

scope103

Let's see. One tank of gas, about $65. One remanufactured caliper from Autozone, about $53.

Times are hard, but stopping is still "a good thing."

By the way, I've replaced the seals on a caliper (not a toyota, though). A very, very fiddly job. I'm pretty cheap, but I'd still go with a reman.

Matt16

Not in Canada. One caliper, last time I checked was way more expensive than $35. We don't have Autozone up here.

Matt16

I jacked the truck up and took the pads out and forced the pots (pistons) in and out a bunch of times. They seem to have loosened up and are no longer dragging. Seems to me like a little rust formed behind the pistons when the old pads wore low. That obstructed the compression of the pistons are caused the dragging. Hopefully I have knocked the rust off and they'll last until this school term is completed and I have more funds at my disposal.

abecedarian

well, you've managed to pump whatever gunk was in there up the brake lines, and likely into the master cylinder.
the better option would've been to pull the calipers and remove the pistons from the bores, use 0000 steel wool to loosen any rust and gunk, clean up everything real good then reassemble them. and just before installing the calipers, flush the lines out real good.

Matt16

Good point. Hadn't thought about cleaning out the cylinders with steal wool.

abecedarian

flushing is still an option, and recommended

Matt16

Flushing is happening, no doubt about that.