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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


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Old 04-12-2012, 12:00 PM   #1
Briou
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Definitive Z23 Front Brake Rebuild Thread

Ok so a while back I went looking around for a thread on mulitple forums for a guide to rebuilding the ever so popular z32 front brake calipers. I was unable to find a thread with much detail on rebuilding these calipers so I decided to dive straight into it and see how it turned out. So here you go.

The parts that you need, and some other stuff that I decided to get just because.

Brake pads: I went with Hawk HPS Hawk HB178F.564 HPS Performance Street Compound Front Brake Pads 300ZX

Pad hardware: Nissan OEM 300ZX Front Brake Hardware

Seal kit, pins, pin keepers, and bleeder screws: 440 Front Brake :: Brake :: Genuine Nissan Parts :: 300ZX Parts (Z32) 1990-1996 :: Nissan Parts, NISMO and Nissan Accessories - Courtesyparts.com

I started off with some aluminum z32 calipers that I picked up at a junk yard for about $90 for both front and rear....along with rotors and spindles....I think I got a pretty good deal.



So I got to work tearing them down, first by taking the two halves apart for both calipers. Make sure you grab the little o-ring seals from between the two halves and put them somewhere safe.




Once you have the halves apart you need to take off the keeper ring...pretty easy with a flat head screw driver or some needle nose pliers.



Then comes the dust seals, just pull them on out.



Now for the tough part, pulling out the pistons...I would imagine that this could be done by blowing some air into the calipers using an air compressor, but I don't have one so I had to resort to brute strength. Let me tell you it was a bitch, even with WD-40


Then out come the inner seals.



Should have something like this once you get them all broken down.


This was the point that I sent my calipers off to get them powder coated in wrinkle red. :sweetass They did a great job!!



When i got them back I was so pumped to get them back together. Soooooo here we go...

First thing in were the new inner seals.



The put the new dust seal on the pistons as well as the supplied pink lube/grease...makes getting the pistons back in a breeze.





Now simply press the pistons back into the cylinders and push the dust seals down into place around the outer lip of the cylinder.



Time for the keeper rings. They are easily put in by hand


Then go ahead and bolt the halves back together. Remember to put the seals back in that you saved when you took the calipers apart!!!!



I opted to get new bleeder screws so I put them in after I got the halves back together.



And now time to put in the brake pads and all the hardware. I used this diagram as a guide. I found it via google and mean no copy right infringement. I am guessing its from a 300zx FSM.
http://importnut.net/240pics/brake_upgrade/pad01.jpg

So this is very thing that I had to put together. Hawk HPS ferro-carbon pads and oem hardware from nissan, including new pins and pin keepers!!


So first you need to put some brake grease on the pads, then put on the solid shims, then more grease, and the outer, slotted shims. Also the little clip deals that go on the side of the pads closest to the bleeder screw.





Now the pads can go into the caliper along with the pins, cross spacer, and pin keeper.



Should end up looking something like this.





Now slap those bad boys on and get to stopping like a champ!!!!!!!

Up for sticky mods?
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Old 04-12-2012, 12:06 PM   #2
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paint came out pretty cool. Nice job...
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Old 04-12-2012, 12:11 PM   #3
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Thanks!! They are powder coated in wrinkle red by the guys at trgcoating.com. Real quality work I highly recommend them!!
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Old 04-12-2012, 12:57 PM   #4
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Awsome write up
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Old 04-12-2012, 01:22 PM   #5
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Nice work broski!
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Old 04-12-2012, 01:30 PM   #6
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Nice job. They turned out great!
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Old 04-12-2012, 02:47 PM   #7
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the z1motorsports rebuild kit is actually cheaper and comes with the o-rings that split the two halves of the calipers:

Front Brake Caliper Rebuild Kit

good write up
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Old 04-12-2012, 03:02 PM   #8
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Great Tutorial!!!!

Thnks!
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Old 04-12-2012, 04:39 PM   #9
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^^Yeah I am probably going to get their rear seal kit when I do the rears...I was just getting all those other little parts and some other things from courtesy parts and it didn't add anything to shipping so I thought it would be easier to just get the oem stuff from them.
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Old 04-12-2012, 04:56 PM   #10
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Nice, I went with wrinkle black.

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Old 04-14-2012, 03:36 PM   #11
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The Brakes came out nice.Can you tell me with how much NM or ft-lb you have put the 2 halfs twogether!

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Old 04-14-2012, 11:31 PM   #12
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looks like the best rebuild thread. love wrinkle red and how proper you rebuilt these.
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Old 04-14-2012, 11:51 PM   #13
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nice work,im assuming this will work for the 26mm size to ...correct me if im wrong i just got mine!!
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Old 04-15-2012, 12:31 AM   #14
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Amazing write-up!!!! I love it, very detailed. I thought it was pretty tough, but with this write up, looks like a cinch.

Second on how much to torque the two halves together?
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Old 04-17-2012, 07:55 AM   #15
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um....haha I honestly didn't put a torque wrench on them. I just cranked them down as much as I could with a standard ratchet handle...that is my one downfall I guess haha...
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Old 04-17-2012, 07:58 AM   #16
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When cleaning up the nissan logo what grit do you suggest to start sanding with. When I was ALOT younger my pair had been sanded almost completely off. I'd rather people not do that anymore. Also to completely remove the Nissan logos what grit would you suggest, for logos that are far too gone to have ours shined back up. Thanks for making this super easy, more people need to do more for the community.
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Old 04-17-2012, 08:03 AM   #17
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I honestly can't be sure because the powder coater took care of mine, but if i were to take them all the way off I would start off with an angle or die grinder to take them down close to the caliper face, then go to some 80 grit and work your way to some 150 grit....once again I haven't done this so I am not sure if it will work....give it a try and let us know how it goes for you.
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Old 04-17-2012, 08:08 AM   #18
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nice write up... surprized you didnt hone out the cylinders a litle bit
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Old 04-17-2012, 08:27 AM   #19
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I figured they would be fine...I did take a light sanding to the pistons in some spots where they had some rust built up on them.
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Old 04-17-2012, 12:47 PM   #20
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Nice, though i wouldn't result to yanking the pistons out. Be careful when you blow them out with compressed air, those things are knuckle dusters.
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Old 04-17-2012, 05:56 PM   #21
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Well my lack of an air compressor left me with no other choice....if I were to use an air compressor I think I would stuff a towel between them to absorb some of the force...
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Old 04-22-2012, 03:54 PM   #22
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If anyone else gives this a try let us know how it goes for you...i'm sure telling us about your experienced won't hurt!!!
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Old 05-17-2012, 05:02 AM   #23
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My rebuild kit didn't come with that small packet of pink grease. What kind of grease is that? Do I need that to do a proper rebuild?
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Old 05-22-2012, 10:31 AM   #24
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I don't know what type of grease it is but it would be a good idea put some on the pistons just so they don't bind up....I would just use some brake pad grease...it seams to be the same consistency
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Old 05-22-2012, 10:47 AM   #25
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Good stuff. I was just looking for this as I was about to rebuild my calipers within a week.

Thank you!
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Old 05-22-2012, 11:09 AM   #26
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good write, nice to see some of this community likes to help out like in the old days!
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Old 05-23-2012, 01:15 AM   #27
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Good write up! I just picked up mine z32 brake conversion yesterday and planned on doing some crazy colored caliper paint on them. But your wrinkle red sure has made me rethink my plans.
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Old 05-23-2012, 01:55 AM   #28
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Ive rebuilt two sets thus far, relatively easy. Compressed air works great as long as you place a piece of woid or like before mentioned, towel. Ive only ever used the nissan kit, never cracked halves. Was advised against, because it makes them prone to leaking or so ive been told
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Old 05-23-2012, 11:27 AM   #29
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Yeah I've heard that too....Oh well I will see how they work out in the long run
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Old 05-23-2012, 11:53 AM   #30
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I had a set of rebuilt z calipers that were split, and never had any issues with them. I had them for about 2 years, tracked a few times and daily most of the time.
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