G50 Clutch Questions

jjemg · 11-24-2012, 06:53 PM

I bought an 87 with a G50 a few months and have been working to get all the little problems out and now moving to some of the larger ones. A little history.. When I got the car the PO said he had the clutch shutter fixed by a flywheel resurface, I said OK and drove the car and did not notice anything strange and figured it would need a total update on the clutch and that was that. I have only put a 100 miles or so on the car just for a little testing and so forth.
So.. today was the day to start work on the heads and dropped down the motor and separated the tyranny and it looks like a new disk and pilot bearing. It also has been rubbing on the flywheel bolts.
I tool some pics and my question are,
Is the disk and flywheel still OK to use and is it the updated version of both?
by the looks of the pics have the other parts been updated?
Thanks for the help!
Jimmy

wildcat077 · wildcat077's Garage

Jimmy,

From what i unserstand it's a no-no to resurface a G50 3.2 flywheel due to the fact that it uses a hydraulic clutch ...
I'm sure somebody will chime in with the correct reason,but you might want to be looking for another flywheel and from the looks of it,another pressure plate as well.

The update is for the clutch fork bearing/bushing ...

Cheers !
Phil

jjemg · 11-24-2012, 07:48 PM

Thanks for the note Phil! The flywheel is toast, I knew I would have to replace that. You think the Plate is shot also?

88911coupe · 11-24-2012, 08:05 PM

This issue was discussed in another thread but the bottom line was that the issue of resurfacing the flywheel being a bad idea is specific to situations using the original rubber centered clutch. IIRC you CAN resurface the flywheel in instances where you dispense with the original rubber centered clutch. I don't recall the exact reason but that's the net net of the issue from what I recall. I'd do a search to dig a little deeper.

jjemg · 11-24-2012, 08:30 PM

Well the problem is the springs on the disk have been rubbing the flywheel bolts. I was thinking someone would of had this problem before. A little different from anything that I have come across.
I did a little searching. must not have hit the right one yet.

Deadeye · Deadeye's Garage

Are there any identifying numbers on that disc? It looks like an aftermarket piece.

bazar01 · bazar01's Garage

I think you need to get the correct replacement clutch disc with six (6)smaller damper springs to keep them from rubbing the FW bolts.
This disc is for a 1987-1989 911.
Pelican Parts - Product Information: 930-116-014-02-M38

The old disc still has a lot of friction material and the rivets have not made contact with the FW and PP surfaces and that means the FW and PP are still ok.

hcoles · 11-25-2012, 07:07 AM

I resurfaced my FW, I think they took off about 0.005", seems to work fine. I replaced with a steel clutch. You have the no drill bushing upgrade, check the condition of materials.

jjemg · 11-25-2012, 07:30 AM

I have never had real clutch problems before so this is all new to me but by the looks of it there is some problem!As much trouble as it is to get to I sure want it corrected now instead of pulling the engine later. The guy I got the car from seemed to not think to much of the resurface, I am reverting to the experience of the group to look at the pics and make a determination of what the hell happened to it!

Quicksilver · 11-25-2012, 08:02 AM

As has been mentioned the standard answer is "no resurfacing" but someone may have a technique that is workable. Haven't ran across one yet. I had enough trouble finding someone that could do blanchard grinding the last time I did a clutch.

Obviously that is a non stock disk for a 3.2 as the stock one has a rubber center. (I'm not a fan of the rubber center so I would use some sort of sprung hub...) Either the disk is wrong or the bolts have taller heads. If someone has one apart maybe they can measure them.

The disk is a throw-away because of the damage to the springs. A huge groove like that and they will crack and just what you need is to have to tear it down because the chunks of spring have destroyed enough that you have to replace a bunch of other stuff.

BTW - The bronze bushings on the throwout arm are the preferred update for the problems with the original bearing.

jjemg · 11-25-2012, 08:14 AM

OK.. The disk is gone. Will look for a flywheel to replace .How about the pressure plate?
Is it done too?
I looked at the bushings and thought this was OK. How about the fork? Do I need to consider replacing that?

ShakinJoe · 11-25-2012, 08:36 AM

Go to Kennedy for PP and clutch.

Jesse16 · Jesse16's Garage

Your fork and bushing upgrade look like whats on my 87. I can't imagine a problem with the existing fork. Its very beefy. Just make sure the bushings still fit the shaft nicely. I still have a rubber center clutch so all else works fine.

Deadeye · Deadeye's Garage

jjmeg, That disc is not the correct par.t I have a Sachs lightweight high performance pressure plate and clutch plate with light use. PM if interested. Will separate if you don't need both.

wildcat077 · wildcat077's Garage

Jimmy,

I would look into Dennis's lightweight pressure plate and clutch disc,he's a stand up guy and you'll be getting good parts !

Cheers !
Phil

jjemg · 11-25-2012, 01:13 PM

I PMed him Phil. He's trying to help me out. Still need to address the flywheel though. Can't stand the thought of not replacing that also if I am going to all this trouble. This car is going to be nice when I get done,but right now tons of little problems!
I really appreciate all the help I am getting from everybody!

Jimmy