More trouble! V6 brakes

[David]

This is a long story. I was going to change to a 5 stud conversion today but I've come across yet another stumbling block. The pads didn't fit in the calipers, they look the similar but are still wrong, There is a semi-circular part on the top of the pad aswell. So I thought I'd just whip the pads off my other astra that already has a V6 brake set-up (288mm). Took off the caliper and the have the same semi-circular part on top
At this point I think right I'll just use the whole set-up from the other astra(288mm). Went to put the discs on the 5 stud front hubs and the inner part on the back of the discs doesn't fit over the hubs

I was sold what I thought was Calibra 284mm V6 calipers, discs, pads and 5 stud struts.
What I know for sure is:
I measured the discs and they are 284mm.
The PCD on the 5 stud hub matches the PCD on the 284mm discs
The PCD on the 284mm discs matches the 288mm discs
The 284mm discs fit over the 5 stud hub but the 288mm discs do not
Both sets of calipers can be bolted to the 5 stud struts

So whats wrong here people?
Is it that the calipers i've got aren't right?
If the 284mm pads are different to the 288mm pads that might be the problem? Did i get sent the wrong pads?
Are 284mm discs different on the back to 288mm discs?
Are the struts wrong?
Any ideas would be greatly appreciated

 

[big e]

Sounds like you have 284mm hubs discs and calipers but the pads are 288mm which do not fit the 284mm calipers because of the semi-circle part you mentioned. The 288mm discs will not fit the 284mm hubs because the outside diameter of the of the hub is bigger than the diameter of the back of the disc. I tried using veccy 288mm set up on my cav v6 that has 284mm set up on it and found all this out for my self.
What you will have to do is use the 284mm hubs, discs, and calipers and get some new 284mm spec pads..

You could cheat like i did and grind the semi-circle off the 288mm pads, they will then fit the 284mm calipers..

 

[David]

Excellent thanks mate! I might try grinding the semi-cirlce part off the pads then. For some reason I thought 288mm pads and discs and 284mm pads and discs were interchangable and thats what threw me when I looked at it.

 

[Mark T]

http://77.96.244.172/sytemsandsoftw...omotive/How_to/Cavalier3/288or308mmbrakes.htm

284 Left, 288 Right.

 

[big e]

For some reason I thought 288mm pads and discs and 284mm pads and discs were interchangable and thats what threw me when I looked at it.

Exactly what i thought, was scratching my head for ages trying to work out why they wouldnt fit..

 

[David]

http://77.96.244.172/sytemsandsoftw...omotive/How_to/Cavalier3/288or308mmbrakes.htm

284 Left, 288 Right.

As regards to grinding off the semi-circular part on the pad so the 288mm pads will fit the 284mm calipers, I was looking at that yesterday and thats fine but if you look at the locating parts at either side of the pads in the picture that fit into the pad carriers they're very different and were kind of loose in the carriers too so I think I'll have to buy new pads altogether.

Next question is what car uses the 284mm calipers. Calibra or Cavalier? I think I read somewhere that its both but i don't know for sure.
Cheers

 

[big e]

Your best to get some 284mm pads i only modded the 288mm pads cos there all i had at the time, ive since replaced them with 284mm pads..

Both cav and calibra use the 284mm set up but the 288mm set up was fitted to late calibras 97 on iirc..

 

[Mark T]

Cavaliers and Calibra up to 95 used 284s.
Saab 900s up to 95 too.

 

[David]

Cheers lads i got the pads today