I had to replace the boots on my '88 928s4. Not sure about the '79. Let me try to help with what I did.

Never had to take the wheel nuts off. All nicely from the tranny side upwards. You need space under the car. That's all. Unscrew the six hex-bolts at the tranny, and lower the axle. Loosen the exhaust, but leave it hanging. That is already enough.  Maneuver a little to get the axles down in a 30 degree angle. Working on, and re-packing the CV's is fairly easy. There is a C-clip that secures the inner CV. Take it off and slide the CV off. Use a soft hammer if it's stuck, but be very careful. Make sure no sand or dirt gets into the CV if you're not planning to clean it completely. After cleaning you have to repack with special Molycote grease that is supplied with the boot. The wheel side is easy. The bitch is getting the tranny side boot on again, which is in reverse direction: small opening first.

I made a small metal cone to slide the boot up the last CV. The problem is that you need about 6 hands if you try to get them
on if you plan on using screwdrivers and such.... I used a beer-can to make a the small cone, and this really helps. Push the cone in the opening of the boot, push both together over the axle, and slide the cone out. Careful not to cut into the rubber boot!
Taking the wheels off will make securing the clamps on the wheel- side an easy job. The tranny side is easy from below.
First time I did this for two boots... it took about 2 hours.

I had a problem that the boot was apparently a bit shorter or stiffer even though original 928 number... so I had to do them all again within two months. I then did all 4 in just one hour. One year later they are still fine. So check within a month to verify that yours are still ok! Replacing the joints/axle will cost a bit !

Good luck,
Theo Jenniskens


> Rock wrote:
> > I'm replacing all my CV boots because most of them cracked, and it all went nice and easy until assembly. How the heck do you get the large end of the boot over the flange? My flanges are in pretty bad shape (bent up a bit), but it doesn't seem like the diameter is that far off of what it would have been otherwise. But I just can't seem to get the boot on their.
> > Do they really stretch that far? You'd barely need the clamp with that kind of tension. :)
> >
> > Any advice is appreciated. I need to get it back together soon.
> > Thanks
> > Rock
> > '79 Euro 5speed


> Rock,
> The trick is to stick your hands through the hole of the flange from the inside. To re-state: with flange lip facing up, stick boot on top and insert hands through bottom. Work the boot over the lip using fingers, and maybe thumbs, from the inside of the boot. No tools needed.
> I had problems with this the first time as well and actually asked my friends at 928I to check parts and make sure mine were stock. Had tried for hours with screwdrivers and such to work it over from the outside.
> Doh^3.
> Glen
> '80 Euro S


That finally did the trick. Very rough on my brittle, carpul tunnelled, videogame fingers, but being able to gloat over those dang boots (HAH! Who's laughing now you stupid rubber boot?!?!?) makes it all worth it. :)

The screwdrivers definitely weren't working.


The "normal" replacement boot ,the aftermarket, for the early car is simply too small. The Porsche replacement is larger. This is one example where aftermarket just does not work as well.

Jim Bailey
928 International

Iím replacing the CV boots today and Iím to the point of putting on the new clamps. The clamps Iím using (below) came in the kit from 928 Intl.

Iíve searched reenlist posts/U-tube to see how to tighten these with no luck. Iím hoping I donít need a special tool to avoid a 2-week delivery. If it DOES take a special tool, is there an alternative with common tools? I can get them ďsnugĒ with hand-grip, but not as tight as I think they should be to keep them from popping off later and grease flying out. Once tight, is there something that should be bent or flared to keep them tight?

BTW Ė What a crappy job. Just sayínÖ

Thanks! / Bruce

These clamps look a bit crappy, but they are the best in its kind.

This tool is intended to tighten the clamp, but large plier/cutter does also work as long as you do this with some care and not cut the clamp :)



With cv boot clamp pliers like this. You can use diagonal cutting pliers also if your careful.
Or just use side cutters and do both sides back and forth.