1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Front wheel bearing torque?

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Old Oct 13, 2008 | 12:58 PM
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Front wheel bearing torque?

Hey guys,

After inspecting my front end in search for a rattle, I was astonished to find 3 of 4 lug nuts were completely stripped out on the front left. I recently got this car, and did a once over before, but missed this as I did not take the wheels off. I'm actually a little pissed at the PO for not mentioning something like this. Anyway...

Is it hard to get the bearing out of the brake disc? I have one on order and have not pulled the one on the car off yet. Do they just slide out? How much torque is required on the 23mm nut when putting it all back together?

I've checked the wankel.net manual but section 12-4 is missing.

This is a 1985 GS btw.

Last edited by dgmorr; Oct 13, 2008 at 01:00 PM.
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Old Oct 13, 2008 | 01:11 PM
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Check here for the manual (FSM):

http://foxed.ca/foxed/index.php?page=rx7manual

The nut is not tight at all. You don't want it to be. There is a procedure in the FSM on how to do it. Basically you torque to about 25 ft-lbs, rotate the disc a few times, and then backoff on the nut a bit.

The bearings just slide out. There are actually 2 per side (inner and outer) as well as the grease seal.

If you are replacing the disc/hub, you will need to drive the bearing races (comes with the new bearings) into the hub. Some people use a socket or similar to fit the ring of the race and then drive it in. I didn't have much luck with something on hand that fit just right. I picked up a cheap race/seal driver from Harbor Freight ($40). Made the job so easy.

Remember to pack your bearings good. I also recommend a good synthetic wheel bearing grease for the job.
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Old Oct 13, 2008 | 01:36 PM
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Originally Posted by dgmorr

I've checked the wankel.net manual but section 12-4 is missing.
I never noticed there were pages missing. I scanned them for you and added them to the pdf:
http://foxed.ca/rx7manual/manuals/19...2526_tires.pdf

As for the bearings, you will need a hammer and a drift to remove the old races, and to put in new bearings, heat the rotors over a woodstove or something and put the bearing races in the freezer. Then use a socket or something the same size of the races to hammer them in.
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Old Oct 13, 2008 | 02:43 PM
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Or, you can take them to a machine shop and get them pressed in, for only a few bucks.
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Old Oct 14, 2008 | 02:24 PM
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Thanks guys.

I haven't checked the rears yet, but how hard is it to swap that hub?
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