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914World.com _ 914World Garage _ 914/4 rear 5-bolt problem

Posted by: JmuRiz Mar 6 2003, 11:27 AM

I have a 914 5-bolt kit that's being installed and the rear caliper will not fit on the 914/6 disk that I was given. Any ideas on what to do. I'd rather not have to machine down a brand new 914/6 rear disk.

Has anyone else had this issue? If so how did you fix it, thanks!

Nathan

Posted by: Bleyseng Mar 6 2003, 12:25 PM

Yes, the 4 calipers don't have the same clearance as the 6 ones as the 6 disc is a tad larger. So grind out the 4 calipers alittle bit so it fits.
Geoff

Posted by: Dave_Darling Mar 6 2003, 12:27 PM

Geoff, he says (on the Pelican board) that his problem is not the diameter of the rotor (known problem in some cases), but with the thickness!

I'll say it again--you either have vented 911 rear rotors, not solid 914-6 rear rotors, or you haven't pulled the caliper pistons in far enough.

--DD

Posted by: Bleyseng Mar 6 2003, 12:36 PM

Yeah Dave, the 4 disc and 6 disc are the same thickness unless you have a vented rotor. The of 4 calipers might need the pistons pushed all the way in to get everything to fit as its tight!
Geoff

Posted by: J P Stein Mar 6 2003, 03:04 PM

I had 914/6 rotors with 914/4 calipers on my car at one time.
The -6 rotors are slighly tihicker....bout .020, IIRC.

Back off the venting clearance screw, push back the pistons and they should go right on. Mine did.

Setting the venting clearance is a PITA. When/if you get to that point, lemmeno and I'll tell ya what I did.

Posted by: Jeffs9146 Mar 6 2003, 03:42 PM

See section 6 of the workshop manual pages 3.2-2/2 and 3.2-3/1

I dont know if you will be able to read this one:

Posted by: joea9146 Mar 6 2003, 08:41 PM

On my rear conversion I had a problem with the outer diamater of the rotor had to have it made smaller so the caliper would fit. This was on a 1975....