PR6 Front Bearing Torque and Bolt...

PR6 Front Bearing Torque and Bolt...



Original Poster:

5 posts

118 months

Tuesday 23rd June 2020
quotequote all
I've been looking here, consensus appears to be 180-200 of fine English ft/lbs to be applied to the front hub nut.
My question refers to the Hub nut, so let us not get confused with the CL nut, I have four studs securing the wheel.

Old bearing is out (play appearing after the cars first test) and a (some) new one(s) will be with me tomorrow. Before removal, I attempted to tighten the hub nut (i.e. to check if the play was due to slack off), only to have it strip @160 ft/lb.... hmmm...
Cap head bolt holding it all together is a std. coarse M16 (12.9), closing two concavely conical spacers/washers (for want of a better description), Stripped nut is of unknown tensile quality, to be replaced with a 10.9 P. I assume this is what I should find in the front end? Torque setting for these components looks very high (to me).

Bearing was an 'SNR', contained grease (not as much as I had thought it would), showing no signs of distress bar a shiny groove on the inner race.

So.. IS the bolt in here what it should be? Is the torque setting of 180-200 ft/lb the right way to go?

One of the rears has also developed play after the testing, so that's next... hey ho.


1,386 posts

169 months

Tuesday 30th June 2020
quotequote all
Here's the torques for various components.

M16 will take that torque no bother at all so I'd verify the torque wrench and the bolt to nut fitment inc thread. Think I replaced all the bolts/nuts when doing this job as well just to be sure, it's an important part smile



Edit - I've got spare front hub nuts/bolts from a PR6, if you want I could measure it up when I'm next in the garage?

Edited by dunc_sx on Tuesday 30th June 10:32