The Stovebolt Site Forums The Shop Area The HiPo Shop Rotors won't fit my MII Spindles

I have a 55 2nd ser truck with a Heidts front end under it. I bought the big brake bracket to adapt 78 - 88 Chevelle rotors and brakes to it. I am having problem getting the rotor to go on the spindle far enough to get the cotter pin in. Has anyone had this problem before. Could I have the wrong rotors or bearings maybe? When I tighten the nut down real tight the cotter pin still won't fit. any info is appreciated.

The rotors should slide on easy, so it sounds like you have the wrong rotors/bearings or the wrong/incorrectly machined spindles. You might want to contact Heitds to make sure they sent you the right parts, and also to double check on the recomended brake components to use, as "78-88 Chevelle" can't be correct, Chevelles were discontinued in '77.
You mention getting the spidle nut "real tight", you shouldn't tighten them down very tight at all, as it will damamge the bearing races. Should only go to just snug, back off, the lightly tighten it to the first cotter pin slot.

78-87 are GM metric G-body. Are you talking G-body or B-body rotors?

The spindle nuts are to be tightened no more than 25 inch-lbs then backed off to the first cotter pin. As Bill said, any more than that and you wreck the races.

The 'big brake kit I have is based on '69-'72 Chevelle rotors.
I know this sounds a bit obvious but did your new rotors already come with bearing seats installed?

I assume you are aware you have to remove these and install the new bearing seats that should have been supplied with the bearing kit.
This 'adapts' the rotors to fit the Mustang II spindles.

My inner bearings are Timken Part #TL68110 Seat
The inner race is #TL68149
My outer bearings are Timken Part #TLM12710 Seat
The outer race is #TLM12749
The grease seal is specially made to fit the Chevy rotor/Mustang spindle.It is not normally a standard dealer part.

As Scott mentioned,tightening the nut too tightly will trash your new bearings...Don't ask me how I know.
I learned the hard way a few years back!

Good call Jackbolter

Thanks Guys I appreciate the help. Jockbolter you figured it out I didn't know you had to change the races. I'm not much of a mechanic but I'm slowly learning.I'm guessing that the GM races make the rotors not go on as far as the other bearing races. Oh and I checked the part #'s and I have the right ones.

Thanks John