CV Boot Replacement

[jazzbass]

Originally posted by randywebb
yes some have the adhesive backing, but other do not. What controls which ones you get, I do not know.
and you do need 4 each time you pull both shafts off -- ie the 2 posts above are in disagreement - 2 per axle (1 for each attachment), 4 for both axles

You don't need 4 gaskets to pull the shaft off, but you do need 4 per axel when replacing boots. I did this procedure 3 weeks ago. I did not just replace the entire axel shaft with a new one (which would only have required 2 gaskets per side), but replaced the boots on my old axels, and can tell you from personal experience - there is one gasket between each boot and the CV, and one gasket between each CV and where it mated to the car - 2 gaskets per CV joint x 2 joints per axel x 2 axels per car = 8 gaskets total for cars with the older style 100mm CV joints like that of SCs and early (pre 85.5) Carreras.

BTW, this is a good time to replace the CV joint bolts, esp if you plan to track the car. They're cheap - about $1 each. Make sure you get the right ones - they need to be grade 12.8.

[Fishcop]

There is and was no gasket between the boot and the CV on mine...

Have they perhaps changed btw the old (pre Carrera) and post Carrera cars?

[jazzbass]

Here's a picture taken during my CV boot replacement. My axels are the 100mm type where the boots have a metal flange integrated into them. This is the style from (I think) late 74 to mid 85. The red arrows point to the two locations where the gaskets go. I don't have a picture, but the flange on the boot is machined out for the gasket, just like the flanges on the transmission and the stub axel in the car are.

[Sumotang]

Looking at the boots I have there is a recess at the rear of the boot that would allow the gasket to be inserted.

I will post a pic when I get home of the boot.

Thanks for the info Chris.

[randywebb]

I think a '69 would need the gaskets (they are often left off by hacks). Either check the Pelican catalog or PET to be sure. Or start a new thread with that specifc question.


Note that people are a bit at cross purposes above - some posts relate to cars where you don't have to remove the wheel axles, and some to where you do (all Carreras? some?)

[RoninLB]

I don't use CV to hub gaskets.

[Fishcop]

Bet you're glad you asked now Damo

[randywebb]

Ron, you... you... hack!

[RoninLB]

Originally posted by randywebb

Ron, you... you... hack!

[Sumotang]

Here is the new CV boot and you can see the recess that will mate up with the CV Joint.

It will be interesting to see if there are any gaskets on this interface when I get it off.

There are sooooo many different opinions on how many gaskets and where they go.

[Sumotang]

Here is a pic of the individual at the centre of this post

[randywebb]

"There are sooooo many different opinions on how many gaskets and where they go."

- It's simple -- do it the way the factory sez - use the manual, Bentley, PET, or the Pelican diagram in the online catalog.
You can get away w/o a gasket (see above) - I've done it... for a while. I wouldn't put 2 where 1 shold be tho.

[ckissick]

Just trying to clear my good name here. (I'm not a hack, really!)

I searched through our host's catalog for the cars up to 1989, and they only indicated 2 gaskets per axle, with no mention of a gasket between the boot and the flange. My Haynes repair manual makes no mention of these two other gaskets, either. What's the deal?

[jazzbass]

I've seent he same thing everywhere, too - everyone mentions 2 gaskets per axel. I think that's because common wisdom is to replace the entire axel, not just the boots (the PET manuals I have don't even show the components of the axel).

But, when I pulled my factory original ones apart, there were in fact 4 gaskets per side, as I've mentioned before. This was a fun lesson to learn in the middle of the job as I had only ordered 4 gaskets to do the job - had to get the other 4 from a local mechanic I know.

[RoninLB]

the real deal from Porsche "Parts and Technical Reference Catalog" 12/95

[jdowty3]

It's a good idea to replace all of the CV bolts and Schnoor washers. You can buy them in bulk from Metric MultiStandard and easily sell the extras to other board members.
Item # 912, Socket Head Cap Screw 8X50 Grade 12
Item # 912, Socket Head Cap Screw S8

Pelican catalog says early 85 is 8mm and late 85 is 10mm but the picture of the boot looks like 8mm.

[Sumotang]

Managed to get the bolts off on the wheel side.

Only managed to get 1 bolt off on the transmission side. The remaining 5 bolts have semi rounded hex nuts.

any suggestions on getting the remaining 5 off. This job is becoming a serious PITA.