Jaeger

Hello Rennlisters,

I have a 928 and it's 18" wheels off a 2001 Carrera 4 have a slight fitment issue. The center caps do not seat down, in fact they stick up about 1/4" on the front hubs and one of them flew off. Any chance someone makes a extension ring to adapt to the factory porsche centercaps ? I think I've heard alot of people talk about pounding the grease cover down, but that just seems like a poor way to screw up good engineering on the car. It would not seem too hard of a task to machine or mold a center cap extension ring out of aluminum or plastic.

Any thoughts? Thanks.

j.kenzie@sbcglobal.net

I think hammering the dust cap on the front bearing is your main choice. You might find a Porsche center cap that is convex rather than concave, but you will have to look around. I used a 6" long 1/2" socket extension and a 5 pounds sledge hammer. I pounded on it to gradually reduce the profile of the cap. It worked fine and the cap is still intact and functional.
Good luck,
Dave

Ducman82

^^^ thats what i did as well. cheap, and no offsetting "adapters"

dr bob

The solution I found is to remove the bearing cover, and cut a 1/4" slice off the flange end that fits into the hub. I used a hacksaw, others have used a Dremel. Dress the cut edge, then clean thoroughly. The cap goes back on, and will fit closer to the end of the spindle now. It's important the the cap not rub on the end of the spindle when you drive, so if you find that you've driven the cap in far enough to rub, pull it back out a bit; It ony needs a tiny amount of clearance, but has to have some.

j.kenzie@sbcglobal.net

Great idea, Dr. Bob. But, you do miss an opportunity to use a BFH.
Dave

James Bailey

Correct cutting the flange is a far more elegant solution. ..

Bilal928S4

Beating the cap with a BFH also sends some of the impact energy to the bearings. Just saying.

James Bailey

Correct just seems quicker....at least they are NOT ball bearings!

Indy Rev

Lets see the rims!

j.kenzie@sbcglobal.net

You guys are making the idea of cutting down the base of the cap sound like a way better idea. I haven't noticed any funny wheel bearing noises, yet. But your method sounds very good. More than a few guys will be frustrated pulling the caps off, but that's a small price to pay.
Thanks,
Dave

davek9

Ha Ha ... "It's all ball bearings now a day's".

Bmw635

I am planning to pick up these wheels Sat and wondering if it has the same issue with bearing cap? TIA.

Turbo Look II wheels
Fronts 99636213601 ET 50 - 225/40/18
Rears 99636214201 ET 45 -- 295/30/18

dr bob

You likely will. It's a quick test with a wheel and a center cap, measure from the bolt face to the inside of the center cap with a straightedge and a scale.

The GTS cars use a slightly shallower cap, and I looked at them as an options, but they still aren't quite shallow enough for the wheels and center caps I have (same caps as in your pictures above). My wheels are 2002 C4 option wheels in 17", likely the same bolt-up dimensions as the ones you show.

MjRocket

Yes

I have this same wheel setup and I had to pound the caps in a bit.

It really was no issue and easy to do with a mallet.

Jaeger

Thanks guys, your the best!