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Changing to longer studs on rear hubs


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Guest Anonymous

The '73 2002 that I'm working on has 320i rear drums. I want to change to longer studs on the rear (the front already has long studs). Anyone done this? What is the procedure to remove the rear hubs?

Also: where's the best place to buy long studs (Ireland Engineering possibly)?

I assume that the hubs are on splines.

Thanks, Larry

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Guest Anonymous

I just did the 320i rear brake conversion... to remove the hubs, all

you have to do is unscrew the 36mm axle nut (car on ground,

wheels chocked, big breaker bar) and pull off the hub. One of

them just came off in my hands, but the other was stuck really

good to the splines. I broke a 3-legged puller trying to get it off.

What worked for me was to borrow a 5 ton 3-legged puller from

autozone, get a good bit of tension on it (jam the hub by putting

a breaker bar against the floor and between two studs), and then

heat the hub with a blowtorch. When mine finally popped off it

was like a gunshot, so be carefull.

After writing all that it occurs to me that I was able to change a

stud withour removing the hub at all. One of my studs was

broken - I tapped it back throught the hub with a small

sledgehammer, then worked a new one through from the back

and sucked it up by tightening a nut on it all the way down to the

hub.

I hope some of this helps makes sense / helps,

- Dave

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Guest Anonymous

I use a real cheapy. Load it with a bit of tension and them with a block of wood and a hammer tap the hub. I have never broken a puller.

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Guest Anonymous

These are very very elusive. At Fest West last year, Dave Varco (aardvark racing) was talking about having some custom ones made up. I haven't heard from Dave, at the time, he was guessing about $5.00 each.

The short answer is that no readily available stud will fit without machining the hole in the hub larger (this is absolutely something you should not do in your garage with a drill press), or putting a smaller stud in there and MIG welding it into the too-large hole (probably also not too great an idea).

If you can source some longer studs that fit, I think the world will beat a path to your door.

Cheers!

John N

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Guest Anonymous

hubs.jpg

Custom made is gonna be a lot more than $5 each I'd bet.

These rear studs are customs, but they were based off an existing product. The work involved removing the finish, turning down the knurl diameter & re-plating.

The reason they only work for the rear is due to the knurl length, the brake drum thickness makes it OK in the rear. The formed-thread length can't be brought closer to underhead in this type of rework, you'd have to pay $$$$ for tooling.

The fronts I use Moroso 46180 turned down to a reasonable length, and also turn the head diameter to fit the front hub. The knurl diameter for the Moroso requires the hub holes get opened up with a 39/64" straight reamer (NOT a drill). This size gives a correct press fit. I would be wary of any welding on the hubs.

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Guest Anonymous

I have owned 2002s since 1978, but with each car I learn more. This board has been, and continues to be, a great resource.

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