300zx brake problem
300zx brake problem
hey guys, i have a set of 300zx calipers it been sitting in my garage for a while now..... i finally got around to put them on my 240. before i put them on i want to replace the pistons seal and the dust boots. when i put compress air in and pop the pistons out.... the piston wont come out .... i guess it been sitting to long in my garage and the brake fluid got dry out and got the pistons stick in there ....... so what is the best way to get them out ?
Since smith is a great mod:
Several different ways to do this, all contingent on the piston being slightly (at least) pushed out so you can push it back in to break the rust.
Hammer and socket – stick the socket inside of the piston and beat it till it moves, then use compressed air to blow it out. (hard to do on 300zx but can be done on other caliper types)
Vise/vise and old brake pad – if you have a vise small enough with a flat face you can put the caliper in it with or without a brake pad attached (helps to avoid marking up the pistons) and turn until it breaks the rust
Clamps/with or without brake pad – just like when you push in pistons from a brake change it works just like it, using the brake pad helps to take pressure off a potential weak area of the piston (the bottom flat part) this way is generally the only one that can work because few can use the socket/hammer and few people have small enough vises.
One thing to note of 300zx calipers is that they separate into two halves, I have not worked had the pleasure of rebuilding opposing piston designed calipers but if you find yourself with the urge to do this you can take them apart and it will make the first two ways much easier to do.
It should be noted you can break the base of the piston with two of these methods which will leave you in want for a new caliper. Also, should you get the piston out you will need new seals and have to get rid of the rust spots, this is generally best done with a hone and very fine sand paper on the piston making your way down to emery cloth. Also, the real hard part in this is finding the proper rebuilt kit, however, should you do so, it will be MUCH cheaper than buying a new caliper.
Now come on smith, delete this again, so you can destroy the spread of this knowledge.
[Trying to E-thug on mods and staff if the worst use of time ever]
Several different ways to do this, all contingent on the piston being slightly (at least) pushed out so you can push it back in to break the rust.
Hammer and socket – stick the socket inside of the piston and beat it till it moves, then use compressed air to blow it out. (hard to do on 300zx but can be done on other caliper types)
Vise/vise and old brake pad – if you have a vise small enough with a flat face you can put the caliper in it with or without a brake pad attached (helps to avoid marking up the pistons) and turn until it breaks the rust
Clamps/with or without brake pad – just like when you push in pistons from a brake change it works just like it, using the brake pad helps to take pressure off a potential weak area of the piston (the bottom flat part) this way is generally the only one that can work because few can use the socket/hammer and few people have small enough vises.
One thing to note of 300zx calipers is that they separate into two halves, I have not worked had the pleasure of rebuilding opposing piston designed calipers but if you find yourself with the urge to do this you can take them apart and it will make the first two ways much easier to do.
It should be noted you can break the base of the piston with two of these methods which will leave you in want for a new caliper. Also, should you get the piston out you will need new seals and have to get rid of the rust spots, this is generally best done with a hone and very fine sand paper on the piston making your way down to emery cloth. Also, the real hard part in this is finding the proper rebuilt kit, however, should you do so, it will be MUCH cheaper than buying a new caliper.
Now come on smith, delete this again, so you can destroy the spread of this knowledge.
[Trying to E-thug on mods and staff if the worst use of time ever]
Re: (Valley)
I doubt he'll do something like that, maybe it was never posted or an accident. I personally would prefer to buy a rebuilt caliper because it is cheaper in terms of labor + monetary costValley wrote:whats wrong smith? cannot stand being wrong so you delete posts? very nice. great way to help spread knowledge.
but if the thread author wants to do it I'm sure your info is appreciated
Yeah man, there is something wrong with you.
Either calm down or leave.
I'm going to edit as I see fit. You will never be out from under my scrutiny as long as you post in this forum.
Deal with that.
If YOU can't post something nice, then YOU don't post anything at all.
Thread locked to end the foolishness Valley has caused.
Either calm down or leave.
I'm going to edit as I see fit. You will never be out from under my scrutiny as long as you post in this forum.
Deal with that.
If YOU can't post something nice, then YOU don't post anything at all.
Thread locked to end the foolishness Valley has caused.
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I'm going to have to concur with Smith here - Not because he's a mod, but because in this instance, he's right.
I have rebuilt 2 sets of 300zx calipers... They're not terribly hard, but given the ease with which you can get NEW ones, it's really not effective.
A caliper rebuild kit from Nissan costs $7 less than a new caliper from BAP Import parts (at least that was my experience).
Brakes aren't something you want to do incorrectly, and find out much too late.
HOWEVER - There is some good to come of all this: Valley wrote a good tutorial for rebuilding calipers, which in certain instances, is your ONLY choice (such as with rare calipers). I'd like to draft it into an article if we can get some pics of the various steps.
Thanks all!
I have rebuilt 2 sets of 300zx calipers... They're not terribly hard, but given the ease with which you can get NEW ones, it's really not effective.
A caliper rebuild kit from Nissan costs $7 less than a new caliper from BAP Import parts (at least that was my experience).
Brakes aren't something you want to do incorrectly, and find out much too late.
HOWEVER - There is some good to come of all this: Valley wrote a good tutorial for rebuilding calipers, which in certain instances, is your ONLY choice (such as with rare calipers). I'd like to draft it into an article if we can get some pics of the various steps.
Thanks all!