front brakes locking up

[shane94]

ok i have 87 toyota pickup, the front brakes keep locking up and the back tires will start to spin. And when it does it I have to unscrew the bolt that bleeds the brakes on the caliper and them they release... What could it be???

[JJSPEC Racing]

Have you replaced any brake components recently? May be a bad master cylinder not allowing all the fluid to return so when the brakes drag slightly they build up heat which makes the fluid trapped in the caliper heat up and expand and apply the brake pad which would cause lock up.

[seanrg1116]

mc\booster clearance issure or (the unlikely) trash in the braking system causing ^^^^ the fluid to onot be able to move properly

[envision]

It could be faulty components in the calipers as well have you ever flushed the system??

[shane94]

just got the truck

[88NaCivic]

Shane look to C if it has 1 of those valves between the master cyl. and intake mani. The vacum line that runs off of the MAter cly.

[95droppedhatch]

well if you need a set of calipers my boss has a set of calipers still i think pm me if your interested

[green91]

Its most likely calipers or the flex hoses going to the calipers. Ive put several sets of toyota truck calipers on at work for hte same thing.

[shane94]

Its most likely calipers or the flex hoses going to the calipers. Ive put several sets of toyota truck calipers on at work for hte same thing.

thats what i was thanking it was going to be

[punkr6]

Its most likely calipers or the flex hoses going to the calipers. Ive put several sets of toyota truck calipers on at work for hte same thing.

x2

[shane94]

thanks everyone

[shane94]

up

[green91]

have you not read the responses in this thread?????

[shane94]

yea, just seen if any one else my know

[LilToySupra]

I had a 92 that did the same thing. I flushed out the lines, blead it good, and still the same thing... after everything it ended up i had warped one of the rotors when playin in the mud... must have hit a rock or something... anyways replaced the rotors and it worked great. something to think about...

[88civic_hatc]

sounds like calipers all day long buddy i would replace the front brake hoses 2

[Umby]

Calipers are shot. Go ahead and replace the hoses and rotors too. Then flush the system and stop on a dime.

[CaTcH22]

If you loosen the bleeder and the calipers release, then its probably not the caliper itself. Maybe the slide pins...doubt it, but its probably the lines or the master cylinder.