Marc Shaw

I don't mean to hi-jack this thread but I am constantly amazed at the library of photos that JasonAndreas has at his disposal.

Marc

Patrick L

Jason,
Thanks for pictures. Never know that I can see through the clutch with tranny on!

Took tranny off today, and found that when pressure plate, friction plate,
and flywheel are bolted together, before put onto the car, the clutch is not
fully engaged (not firmly pressed to flywheel surface). It seems to me that
something wrong with the clutch, otherwise it should fully engaged (or
should I call it disengaged?) when assembled. Is it possible I got the wrong part?

BTW, the throw out bearing is the normal one, not RS version. What happen if I use the normal TOB when a RS one should be used?

Attached is picture of my old (left) and new (right) pressure plates.

Thanks!

Patrick

JasonAndreas

Pat if you can, post the part numbers (not just the Porsche numbers) for the parts you have and a sideview/45 degree picture of your flywheel. Your flywheel doesn't look to be the same thickness as the OE Porsche LWF (it looks like the old MWF but made by fidanza?) so your release bearing is probably the right one. Also how many spacers did you use when you attached the release bearing to the pressure plate? (it should be 2 and not all 3 that come with the Sachs kits)

mark lintott

Hi Patrick,

Who is doing this work for you? Someone in Taipei? Most people I know seem to go to Ah-San on Mintsu E Road. He seems to know these cars inside out and I've certainly only had good results with him.

Staffan

Hi, I just changed the clutch on my 964 turbo.
I had big troubles understanding how the release mechanisme should be assambled, took a while to figure out. Hard to really tell, but the "spring plate" seems to be upside down.

Edit:
I will see if I can find the correct name for it.
It's the "shim" with holes in it.

Staffan

It's called "spring washer".

From top to bottom:
Release bearing
2 shims (1 on turbo)
Spring washer installed like ^ (if you get it), looks like yours is upside down

It's really hard to get the circlip into the thrust washer.
I pressed it as hard as I could, supported on a hammer.
My wife (she is getting used to these things) installed the circlip using a screwdriver.

Patrick L

Jason,
Here are some pictures of the flywheel. The pressure plate part number is 3032152199, it is a Sachs but modified by SPEC. Are these correct things?

Mark,
I have my engine rebuild by my friend who is an engine specialist. He just rebuilt my another friend's 965 with good result. Not really like Ah-Shan's rebuild from something I heard, so I took it to my friend.

Staffan,
Thanks! I'll check that circlip.

JasonAndreas

Pat,
It looks like your starter ring gear was installed onto the flywheel backwards? If you flip the ring gear over your pressure plate should bolt down properly so that the "feet" along the perimeter fit into the ring gear (red arrows in the photo). Also, when you have the transmission and engine back together check that the release fork is not pulling the pressure plate off the clutch disc possibly because your using the stock "short" release bearing.



It looks like you lubed the input shaft but just in case, don't forget to use Olista Longtime 3-EP to lube anywhere there is metal to metal contact or you'll be taking everything apart again in a couple months because of corrosion. I've put arrows pointing to the places you need to lube; the tip of the slave cylinder plunger, the ends of the cross-shaft (under the needle bearings), on the interior side of the plastic grommets on the release arm, the tips of both arms on the release bearing (I only have 1 arrow because the other arm is not visible) and inside the plastic seal on the end of the cross-shaft and most importantly but not in the photo, the input shaft.

Eric Kessel

Jason,
Stupid question, but what color is Olista Longtime 3-EP ?

JasonAndreas

I really hope its orangey-brown but the camera flash makes it look white/green? I ended up buying a tube from Porsche because I wasn't sure if there was enough in the bottle cap (I think I gave it back to Bill but I will check) so I have enough to lube an entire car if you need more.

Patrick L

Jason,

Checked again and seems the starter ring gear is installed correctly (won't fit the other way round). Anywhere I can check if the clutch part number 3032 152 199 (I think it's a Sachs number) is for 1990 C4?

Thanks!

Staffan

Have you checked how the spring washer is installed yet ?

JasonAndreas

Patrick,
The feet around the edge of the pressure plate (red arrows above) need to fit almost completely into the edge of the ring gear, yours look they are just floating and are level with the mating surface of the flywheel. If your ring gear is mounted properly then maybe like Chris said above, your pressure plates bolts aren't long enough? (the feet are exactly 5mm and the ridge another 5mm). The sachs part number for the 964 pressure plate should be 3032-125-199, I don't have the disc number and the Sachs catalog only lists kit numbers.

Eric Kessel

From my LWF notes, the following are in my 90 C2:

Sachs Clutch # 1862.323.031
Sachs Pressure Plate #3032.125.199/3082.213.133 (both #'s on the assembly)
Sachs TO Bearing # 3151.227.001

Patrick L

After discussion with a Porsche technician, seems the clutch setup is correct, and the issue is probably the TOB, as the new setup is thinner than the stock one. I will get a set of used RS TOB and guide tube and try it this week. The seller sent me an original TOB and said I can reuse the guide tube. Now it seems that he provided the wrong part.
Before I put the transmission together again, I would like to confirm something. We noticed some differences in spring plate (?) angle for my new SPEC kit and original one. On SPEC kit, the spring plate is relatively flat, not like original one is at certain angle. (see pictures below)
In most Japanese cars, when the spring plate is at the small angle like the SPEC one shown below, the clutch is not fully engaged and will slip. Maybe SPEC kit is different, I don't know. Is there anyone used SPEC kit before with the same condition? How do I know if the disk is fully engaged? My technician wants to make sure this is correct, so he dosen't have to take out the tranny again.

Thanks!