246GT Dino Clutch / Flywheel questions

Parts books have two different numbers for this part.

after 2131 500828A
up to 2131 500643

HOWEVER, Tom Vail's site shows these as interchangeable.

Is this what you're looking for? I'm just working from the image in the parts book, which does not look like your part.



D
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I've dealt with similar issue on more than one 365GTB/4s and just looking at your photo, I'd say your problem could be a result of multiple contributors. I don't have access to my files for couple of days, but is your clutch pressure plate (=cover?) "standard" 9"-9 1/2" Borg & Beck item (currently manufactured by AP) ?
And your problem is not getting enough pressure plate diaphragm movement/travel to release the friction plate ?
If answers to all above are affirmative, your first step should be to replace the flywheel, which appears to have been, one time or another, subjected to what could be considered as backyard or roadside mechanics attempt to get "extended" life out of it and/or the pressure plate.

 

I am having the same problem. Every site I have seen lists the clutch pressure plate as 246 all, but my '72 takes a pressure plate like shown in the first photo - there are three bolt holes in the pressure plate. The kit I got from Superformance has the same pressure plate as in photo 2 of the OP. Anyone know where to get the correct pressure plate?

Here's what I have / need:
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A better photo showing the difference:
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Maranello concessionaires seem to show multiple parts, but no illustrations

https://www.ferrariparts.co.uk/PagesExternal/Search.aspx

perhaps a phone call will clear it up.

I had a lot of success with them when I was rebuilding my Dino back in the day.

D

 

Is that where you bought the pressure plate in your previous photo? That looks like the correct part.

 

Chris.

Honestly, I don't recall. I have all the records somewhere, and I could dig them out, but I think a quick call there would get you the answer you need.

D

 

What seems to be the problem with that pressure plate from SF?

 

3 studs in the flywheel go through the original pressure plate. You can see them in the 1st pic of the flywheel by the OP and in the pressure plate pic by dm_n_stuff.
I'm thinking the flywheel studs have to be removed or the flywheel needs to be updated to use the Superformance pressure plate. Here's a flywheel and stud set (this will not work with any of the available pressure plates that I have been able to find:
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The 3 studs should be removed by pressing from the back of the flywheel, these are not used with the new sf pressure plate.
I went back and forth with sf on this before they realized I had these locating studs on my early car.

Note that the smaller locating dowels should be kept to locate the cover on the flywheel.

 

Thanks,

That's what I was suspecting.

 

Thanks Andrew for the heads up. I fitted the SF pressure plate to my early L series with no issues. But that might then be due to the dowels being removed already or slight differences betweens models? See attached pictures of old versus new P-plate.

Best Peter
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Your flywheel is different: it doesn't have the 3 long studs. I have no idea which cars have the studs and which do not. Mine is 04860 and has the flywheel studs. I had original flywheel, clutch and pressure plate. The simple solution seems to be to remove the studs and then use the "246 All" pressure plate.

 

I too would go for that solution. Your flywheel will be lighter as well ...-

 

Peter, I think yours was already replaced and the studs already removed. Saved some effort

 

You are most likely right. I observed no significant wear on the old disk, but decided to go all new when I noticed the coloration of the flywheel.

 

Took the 3 long studs out when resurfacing, and the new pressure plate bolted right up.

 

great news!

 

Thanks for the help.

As an aside (if anyone is doing the clutch in the car) there's one nut on the bottom of the bell housing that requires slightly lifting the engine to access. I already had my muffler removed so it was pretty easy to get the 1" lift that I needed.