does an 89 930 need the G50 update?

tiorio · 02-23-2003, 10:10 PM

Well, this weekend has really got me wondering. For those race fans who missed the last lap, my 1989 930 blew the rubber center out of the clutch and the replacement kit came with a throw-out bearing that doesn't fit over the tube.

I've been told that my 1989 930 with G50/50 does NOT require the G50 update, however (and not knowing if I just got incorrect parts) the T/O bearing that was sent leads me to believe that I may need the update.

Does anyone have the answer?

dean · 02-24-2003, 04:58 AM

No. I don't think so. The update replaces the throwout fork shaft bearings. It doesn't have anything to do with the throwout bearing. I think the update only involves the 87 to early 88 G50's. It just sounds like you got the wrong T/O bearing

Wil Ferch · 02-24-2003, 05:01 AM

The update..at least for NA G50's....applies to production from 87 to April 89 when the factory then introduced the update themselves. Maybe look at yout build date and decide.
---Wil Ferch

Rick Lee · Rick Lee's Garage

This is easy to check and there's no mistaking it when you see it. Look at the release fork where the shaft feeds through it. If you see needle bearings in there or any score marks on the shaft, you need the update. Weltmeister makes the ready-to-install kit that doesn't require drilling. John Walker got mine for me for around $150. I wouldn't bother with the drilling method. It's dangerous and the drill bit is very expensive.

tiorio · 02-24-2003, 10:02 AM

So if I have needle bearings (like in the image in this diagram)

The I do in fact need the update, correct? I would certainly go with the Weltmiester upgrade, what does it entail?

Cheers!

Rick Lee · Rick Lee's Garage

A digital photo would be better. But that diagram looks like needle bearings to me. The Weltmeister kit comes with a new shaft and two bronze bushings that press into the new fork you'll also be buying. Throw some moly grease on there and it spins very nicely, doesn't bind and you'll save some wear and tear on your clutch hydraulics (I ended up replacing them too). Post a digital photo of your shaft and fork. Some old threads here have some pretty heinous photos of what it can look like.

KTL · 11:18 AM

Todd,

Here's a picture of the difference between the two.

The upper shaft (#3) is the old stuff and the lower shaft (#14 like you pictured) is the new stuff. If you have the new stuff, you're fine.

The old setup had the needle bearings pressed into the fork. The new setup has bushings/friction bearings in the fork. The bearings on the shaft were changed from bushings in the bellhousing bores to replaceable needle bearings.

If you have the new stuff, then I don't think you can use the Weltmeister stuff even if you wanted to. Your bellhousing bores have already been drilled-out to accept the larger bearing casings of the updated shaft assembly. My guess is that the Weltmeister assembly will not fit in there properly since the bores have been enlarged for the updated bearings and Weltmeister says no drilling/machine work needed. So that leads me to believe Weltmeister's won't work? Just some deductive reasoning on my part...............

With the new shaft assembly, just clean up the bearings (if they're still in good shape) and relube with an EP grease. If anything is suspect, don't worry. None of the factory replacement parts are outrageously expensive. I think the bearings were $8 and $18 ea., the shaft was around $40? The fork is a little pricey- almost $80-90? Can't remember. Anyway, it's the labor that makes this job so costly!

Just as an aside here, not only is the drilling expensive (cost me $199- not too bad really), but you have to find someone who has the kit!!!! Tool kit #9292 is no longer available (NLA) from Porsche. They don't make it anymore. You'd have to be somewhat lucky like me and find a local dealer who has it and doesn't mind you dragging your trans. to them. Although, maybe they'd be kindly enough to loan it to a repair shop (not likely since it's NLA)??? Not likely to loan it to an individual. That's almost for sure.

Also, I don't know what #9 is in Todd's diagram. There's no part listing for that thing in the Porsche reference materials that I have.

tiorio · 02-24-2003, 11:46 AM

Kevin,

You hit the nail on the head (also in the mating posts). I have the new stuff, with the replacable bearings in the bellhousing and also don't know/didn't have part #9 from the diagram I posted.

I don't need the update but do need an updated guide tube to go with the newer T/O bearing. Just wish the salesman would've mentioned that when I asked if there was anything else I would need to do the clutch on a stock 89 930.

Oh well, live and learn... and learn... and learn!

Wil Ferch · 02-25-2003, 01:11 PM

Ask the "salesman?" .....

--
Wil Ferch

tiorio · 02-25-2003, 03:36 PM

I guess I expected more out of the salesman based on his place of employment...

KTL · 02-27-2003, 12:08 PM

Here's the infamous G50 Update information from the Parts and Technical ReferenceCatalog- 911 Models 1974-1989, December 1995:

First is the release bearing/guide tube update:

Then the three pages for the clutch release fork cross-shaft:

tiorio · 02-27-2003, 12:24 PM

Thanks Kev,

Now all I need to get back on the road is the specs of the phillips head screws for the guide tube so I can get the hardware before I get out of the city to the garage!

Cheers!