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dusky007

Rebuilding Z32 and GT-R Calipers

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The 300ZX calipers are a popular upgrade from the S13, and most of the time, the calipers we get are used and worn... Not much of an upgrade if they don't work properly, right?

 

For the purposes of this article, we're going to rebuild some aluminum 30mm Z32 calipers. The 26mm calipers can be rebuilt using the same process.

 

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Remove clip from 2 pins in the back. Pins that are holding pads will slide out from the front.

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Pads, clips and pins will come out easy and they will look like this.

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If you just want to replace worn out or torn boots, you don't need to go further. Just remove boots, clean up and reinstall new boots, clips and pins that are included in most rebuilding kit.

 

If you want to powder coat your calipers, move on!!! I used breaker bar to remove big 4 bolts in the back. I stepped on the caliper and did this.

They were bolted on pretty tight.

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Then remove 'O' clips and rubber boots that protect the pistons. You will also see 2 small 'O' rings between two halves. Everything's out except pistons in below picture.

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Now, it's time to remove the pistons. I spoke with 4 different powder coating shops and all of them asked me to take the pistons out, so I can tell they don't want to powder coat calipers with pistons in.

 

Front half has 2 holes and the back has 3 holes. One on the back is for the brake line. You block holes and blow air in using air compressor. I used hand held 2HP compressor and it worked just fine. Get a trash can and put some newspaper and towel, so piston won't get damaged. They will come out loud and fast.

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One piston will come out first, so use vice to hold that one and pop the other one. You really have to be careful here. You don't want to get hurt.

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Picture of back half. There are rubber seals in the middle of the cylinders, so don't forget to take them out. Be carefull and don't make any scratches on the cylinder wall.

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I cleaned them up really good and shipped these 8 pieces to powder coating shop.

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Came back like this one week later.

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This is the kit that I got from one of our Nissan OEM parts suppliers. This kit should be universial for all z32 front calipers. I had a used set of rear calipers, but they were in very good condition, so I didn't buy a kit for the rear.

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New pistons, seals, boots, clips and 'O' rings...

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This is the seal that goes in the middle of the cylinder.

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Push the pistons back in like this.

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Put small 'O' rings between 2 halves. Okay, here's the deal. These small 'O' rings were not included in the kit. I saw someone bought them from ACE Hardware store though. I just reused old ones. They seemed to be okay. You need to lubricate all the rubber parts.

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Install new rubber boots, big 'O' clips and 4 bolts to complete.

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man awesome article.

 

i have Z32 calipers so I will give this a go just for shits and giggles. Definately a do-able home job and since there's pictures you really can't go wrong unless you're an idiot. Three thumbs up champ.

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f**k that is a good job man, thanks for posting! :)

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Have any of you done it to your calipers?

 

For the cost, about $120 for the kit, $40 for the sandblast, it makes your calipers like new!

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That awsome im all inspired now 2 re do mine on the 300zx z32 i think we need more articles like this good work mate

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i dont think splitting the calipers in half is nessessary? i read somewhere that it says in the factory service manual not to split them...

 

if you do go ahead to split the calipers, probably a lot easier and safer to pop the pistons out before splitting them. put a piece of wood inside to stop it flying out.

 

besides that looks like a job well done. may want to post up part no. to make it that much easier. i did some research and i think ABS sell rebuild kits for cheap.

 

may i ask how much it was to get the calipers powder coated?

Edited by digitobi

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i would like 2 know how much 4 the rebuild kit?

 

Two posts up buddy it says $120

 

I just did a search on FAST and noticed part numbers were different for R33 calipers (not even listed as alternate), do these have slightly different size pistons or something?

 

My mistake, just checked again, and yes its the same part number for R33 calipers through out

Edited by SKYVIA

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Have any of you done it to your calipers?

 

For the cost, about $120 for the kit, $40 for the sandblast, it makes your calipers like new!

 

 

I just had the local caliper rebuilders do the set of R32 calipers i bought for my S13. but I painted them myself with VHT caliper paint.

 

have you done the brake upgrade yourself?

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i dont think splitting the calipers in half is nessessary? i read somewhere that it says in the factory service manual not to split them...

 

if you do go ahead to split the calipers, probably a lot easier and safer to pop the pistons out before splitting them. put a piece of wood inside to stop it flying out.

 

besides that looks like a job well done. may want to post up part no. to make it that much easier. i did some research and i think ABS sell rebuild kits for cheap.

 

The user manual only mentions it, as if the inside o-rings are rooted, they are not included in the kit, and that the contact surfaces need to be perfectly smooth.

 

Part number is visible in the photo.

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FWIW these are the prices I just paid, the fronts are same part number for all nissan 4 pots

R33 gts-t

front: Protex 210E0011 (only does one caliper) $40+gst each

rear: Protex 210E0103 (only does one caliper) $31+gst each

 

note o-rings not included, just piston seals/dust boots/metal clip

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Where do I grab these rebuild kits from?

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