75 or 80mm Front Wheel Bearing
 

I've read that our cars come with 75mm front wheel bearings, but that we might find 80mm bearings installed if a prior replacement included an entirely new hub carrier. When I check autozone for a new bearing, the one it offered me was 80mm. Are later cars (I have an '03 XKR) equipped with the 80mm bearing as standard?

It would kill me to disassemble that whole thing only to find I had the wrong bearing in hand.

Thanks! - Jim

Advise you disassemble the whole thing. Remove the faulty bearing(s), and take these bearings to a bearing supply house. They will provide you with a generic replacement at a fraction of Autozone cost. ALL, and I mean ALL, bearings have stamped thereon a universal part number. Any "Jaguar" bearing is made by an outside vendor using identical specs and technology.

Hi Rey. Thanks for the response.

I know from experience (personal and government) that there are differences in manufactured quality when it comes to bearings, so I don't mind paying a "reasonable" price for a brand I'm comfortable with. And while I also know I could probably beat AZ's price of $68 for their Timken bearing, I at least know who made it.

While I'd love to follow your guidance on process, I can't. I have access to a lift and tools at the auto shop on base (military), and all work must be completed by the end of the day. So I don't have the liberty to disassemble, explore, try and then reassemble. I must have my ducks in a row before I start busting knuckles. This is why knowing the answer to the 75mm question is paramount.

JPEC lists part no MJA1830AD to VIN 031302 which I believe is the 76mm? bearing and part no MNC1830AA from VIN 031303 which is the 80mm bearing.

Way to go Norri!!!

I didn't realize that the parts list gave specifications as well.

Thanks a ton.

It doesn't but if you google the part numbers some of the suppliers give the diameter.

It was only early XKs that had the smaller bearing and a good way to tell is look at the back of the hub, if it has screw in studs and cast it is 75mm if it looks machined all over with press in studs it is 80mm

Hi XKR,

I've looked at several maintenance diagrams for the proceedure and haven't noticed any studs, screw-in or pressed, on the back of the hub. What am I looking for here?

Thanks - Jim

Hi, the wheel nut studs, you can see two of them in the pic below, this is a my2003 hub with the larger bearing.


https://www.jaguarforums.com/forum/a...ine=1392912571