problem with 300zx break conversion

[Nock Out Puppet]

I just installed 300zx breaks and rotors on my s13. The problem is that it apears that the rotors are scraping on the calibers. They put a flat spot in my front tires to the wire, because thaey dont rotate. Has anyone had this problem, or any sugestions.

[IveBeenBad]

maybe you are using 30mm rotors with 26mm calipers, or maybe they arent fully bled, or maybe the calipers are bad...

[Nock Out Puppet]

the calibers came of a turbo 300zx so they should be 30mm. The calibers were fully pressed in so I dont understand how bleeding them would be an issue. their scraping at the edges of the calibers so Iam going to try grinding it a bit in the morning. I was woundering if anyone else has had an issues such as these. Thanks for the input though, but I dont think those where any of the problem.

[sirwarrior]

how would rotors scraping against calipers put anything in your tire?????

[98s14inaz]

I had a similar issue with rotors on my s14. I ordered stock non-abs rotors and they sent me abs rotors and they were too small and trashed a set of pads Ok mabey not that similar, I think all Z had abs so that might not be it. Something sounds weird.

[Hijacker]

all the turbo Zs had ABS. The NA cars had it as an option.

what brand rotor are you using? is it an OEM replacement or aftermarket? did you have them redrilled to 4 lug by a shop or were they already drilled from wherever you bought them?

Lastly, it's brake and caliper. I mean no offense, it just bugs me

[Nock Out Puppet]

There oem replacement, and had them redrilled to 4 lug at the machine shop I work at. The rotors scraping didn't but anything in the tires, it but a flat spot on them waering them out to the wire inside the thread because they locked up when I was driving.

[Hijacker]

double check to make sure your shop didn't get the bolt pattern off slightly. My guess is that when they got redrilled, the center point wasn't precise, making the rotor lopsided once it was mounted. Check to make sure that the rotor is contacting the caliper from all sides of the rotor.

[Chingon]

something i could think of is that you have 26mm calipers and 30 mm rotors. I think they physically fit. Another thing I can think is, when you installed them, did you put the pressure washers back in the bolts. if not, the bolts are probably pressing against the rotors.

[Nock Out Puppet]

ya they got the washers in them. My co worker drilled them for me at the machine shop I work at, and I dont think a better job could have been done. he gauged it all the way and made sure everything was percise. He was teaching me how to do it. It works now. I had to grind down the caliper, a small section where the grove is for the rotor to pass through. It took me all day to fix it. Grind and try to fit over and over again.

[Nock Out Puppet]

Thanks for all the imput though guys.

[Chingon]

ya they got the washers in them. My co worker drilled them for me at the machine shop I work at, and I dont think a better job could have been done. he gauged it all the way and made sure everything was percise. He was teaching me how to do it. It works now. I had to grind down the caliper, a small section where the grove is for the rotor to pass through. It took me all day to fix it. Grind and try to fit over and over again.

The fact that you had to grind the grove where the rotor goes, leads me to believe my 1st assumption is correct. I think you are running the thicker rotor on the thinner caliper. Now that you have "shaved" it however, I guess there won't be any problems and I guess you get a rotor upgrade in the process.

[Nock Out Puppet]

But the turbo 300zx has 30 mill calipers. I have the 4 pistion calipers, and they are realy big. I am pertty sure they are 30mil. They would work fine untill I tightend the 2 rear botls completly.

[BaliLover]

Not all Z32 300ZX had 30mm Calipers, the earlier ones had a 26mm instead. If you use the 26mm calipers on 30mm rotors, you will have the problem that you described. 4mm isn't much so they will fit, but they will be pretty much locked all the time.

[Nock Out Puppet]

you guys might be right. Ill have to mesure them this weekend. Ill let you guys now if they are 30 or 26 mil. But iam pertty sure they are 30mil.

[BaliLover]

if they are 30mm, then there shouldn't be any issues with them locking up and not fitting properly. Thats like saying you did everythign 100% correctly with 100% correct parts, it just turned out wrong. It doesn't happen, there has to be some sort of error, either in the install or the parts.

[Nock Out Puppet]

Has to be the parts then, couldn't be my install job.