Clutch help

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Paul Sereix
356 Fan
Posts: 13
Joined: Tue Apr 08, 2008 1:57 pm
Location: Barcelona, Spain

Clutch help

#1 Post by Paul Sereix »

I have a problem with my clutch. My car has a 1960 transmision # 32826, I ordered a new flywheel because the starter crown was in bad condition. I got a 200mm flywheel and now I discovered that the clutch pressure plate is 180mm. To make things even worse, the car is a 1964 C with engine #730905, which was installed at the Porsche factory under warranty according the CofA in 1966. I know the transmision is non-original, but it's a 741 with two dual mounts and is in pretty good condition. My question is: Can I somehow adapt a 200mm flywheel to a 180mm pressure plate? If a have to order a new 200mm pressure plate to go with the 200mm flywheel, will all this adapt to any 741 transmission?

Thanks in advance,

Paul

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Ron LaDow
356 Fan
Posts: 8092
Joined: Wed Mar 26, 2008 11:45 am
Location: San Francisco

Clutch help

#2 Post by Ron LaDow »

Paul,

"My question is: Can I somehow
adapt a 200mm flywheel to a 180mm pressure plate? If a have to
order a new 200mm pressure plate to go with the 200mm flywheel,
will all this adapt to any 741 transmission?
Thanks in advance,
Paul"

You need to match the PP to the size of the flywheel/clutch. 180mm flywheels are available, but if you are going to use the 200mm part, you need a 200mm PP. It will work fine with your trans, but a pro is going to have to tell you what T/O bearing you need.
Thanks,
Ron LaDow

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Ron LaDow
www.precisionmatters.biz

Captain Wim van der Horst

#3 Post by Captain Wim van der Horst »

You will have to get a 200 mm clutch set-up.
One point of caution, you might have problems getting the engine in because of a reinforcement boss on the inside of the bell housing where the starter bushing is. You can probably grind some of it off. Also, you starter drive gear may not properly engage the 200 mm flywheel.
Captain Wim

Guest

Clutch help

#4 Post by Guest »

Paul,
You have the correct flywheel for the 741 trans. The trans
should also have a guide tube for the release bearing to
slide along. You need the 200 mm pp and disc and also the
200 mm release bearing which starts with a 901 part number.
This not to be confused with the 901 bearing that is used in
the 912 cars. Brad at NLA should be able to set you up with
all the correct parts.

Alan

Paul Sereix wrote:
I have a problem with my clutch. My car has a 1960 transmision # 32826,
I ordered a new flywheel because the starter crown was in bad condition.
I got a 200mm flywheel and now I discovered that the clutch pressure
plate is 180mm. To make things even worse, the car is a 1964 C with
engine #730905, which was installed at the Porsche factory under
warranty according the CofA in 1966. I know the transmision is
non-original, but it's a 741 with two dual mounts and is in pretty good
condition. My question is: Can I somehow adapt a 200mm flywheel to a
180mm pressure plate? If a have to order a new 200mm pressure plate to
go with the 200mm flywheel, will all this adapt to any 741 transmission?

Thanks in advance,

Paul




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User avatar
Wil Mittelbach
356 Fan
Posts: 1019
Joined: Sun Apr 13, 2008 8:58 pm
Location: Huntington Beach, CA

Clutch help

#5 Post by Wil Mittelbach »

Paul -
A 200mm pressure plate is standard for a 356 C engine and 741 transmission. A 180mm pp is not. Recommend you acquire a 200mm pp and have it balanced together with the flywheel before installation. I'm coincidentally going through the same process in replacing the pp, clutch plate and throwout br'g in my `65C.
All the best,
- Wil


----- Original Message ----
From: Paul Sereix <psereix@yahoo.es>
To: 356talk@356registry.com
Sent: Tuesday, July 22, 2008 5:22:25 AM
Subject: [356Talk] Clutch help

I have a problem with my clutch. My car has a 1960 transmision # 32826, I ordered a new flywheel because the starter crown was in bad condition. I got a 200mm flywheel and now I discovered that the clutch pressure plate is 180mm. To make things even worse, the car is a 1964 C with engine #730905, which was installed at the Porsche factory under warranty according the CofA in 1966. I know the transmision is non-original, but it's a 741 with two dual mounts and is in pretty good condition. My question is: Can I somehow adapt a 200mm flywheel to a 180mm pressure plate? If a have to order a new 200mm pressure plate to go with the 200mm flywheel, will all this adapt to any 741 transmission?

Thanks in advance,

Paul

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Paul Sereix
356 Fan
Posts: 13
Joined: Tue Apr 08, 2008 1:57 pm
Location: Barcelona, Spain

#6 Post by Paul Sereix »

Thanks to everybody for the info! :D
I guess I'll have to continue in the direction of the "200mm conversion". It seems that the "guide tube" is the same P/N for both types of "release bearing". So I might be able to use my old one which seems to be in good condition. According to Alan's advice I will order the "release bearing" that has P/N 901 116 081 01 and hope that it matches up with the "release fork" that I have (Thanks Alan! ). I also hope that I don't have to grind much of that "reinforcement boss" off to get the flywheel positioned with the starter pinion. My old 180mm flywheel teeth already got chewed up by the starter pinion because it was not properly aligned... that's what started all this in the first place! ( Thanks Captain Wim! ).

Stay tuned...

Paul

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