Okay,

I took off my clutch and had some questions since I don't know a ton about them.
I know a little, but hoping to find some answers.

1. I had made a complaint early about my car shuttering at low RPMs or while in netrual.
I think I have found the problem. It appears some of the flywheel bolts have been rubbing
against the clutch plate springs. You will be able to see it in the diagram. I am guessing
that the flywheel surface has worn down enough to make contact with springs? What is your
take on it? I figure the shutter is like a tire that lost a wieght while it's rotationg. I guess
since the bolt heads have been worn down, it could throw off the balance of the flywheel while rotating?





In this picture you can see that the flywheel on the edge where the red arrow points to,
it's worn down to about 1/16th of an inch? Is this considered alot where the flywheel is
no good anymore?





Also I noticed that the flywheel has hairline cracks in it. Cracks don't appear to be too
deep, but with the flywheel bing down 1/16th of an inch..is it beyond having it resurfaced?





In this picture below would you consider this clutch pretty much worn out and no more life
to it? What should be the thickness of a new clutch?





Now I notice that the flywheel is made in Germany. Is there a supplier that makes them
for the early 92 Diablo's that is relatively cheap dollar wise? If so who has it or what part
number is it?

Also to do I need t buy a new clutch plate? or can the springs be replaced?

When I assemble the flywheel back on the engine, does it matter where it lines up?
What I mean is that there are magnetic sensors or pick ups on the flywheel...as long
as the bolts match up to where they go on the flywheel and engine am I okay?

Thanks for all the help and support. I also hope what I am doing here posting this
information as I learn helps others out down the road. That is why I am taking the
extra time to do the pictures and so on.

Thanks!

Adam

__________________
1992 Lamborghini Diablo
1992 Ferrari 512TR

Adam,

The information you post is great, very much appreciated.

My info. is that the flywheel should be 35 mm thick, and that the maximum that you can reduce it by is 1 mm.

Looking at the cracks that you have, and the other issues, if it were mine. I would be sourcing a new one.

Mike

I was afraid of that. Sachs makes them, but don't want to go through Lambo to buy it. The prices are ridiculous. I am wondering if I can save anything.

here's a link I found for archive purpose.

http://webcat.zf-trading.com/index.asp?SPR=4

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1992 Lamborghini Diablo
1992 Ferrari 512TR

The clutch "springs" rubbing the flywheel bolts is the classic symptom of the clutch being installed backwards. The next symptom is a fire.

Hairline cracks in flywheel = new flywheel.
The clutch is not worn out but the conventional wisdom is that if the engine is out, replace the clutch. This is not the original clutch given my backwards installation comment.

-mick

Interesting...my clutch was on backwards!

How do you know which way go where? How would this start a fire?

Also what is the average expected life on a OEM fly wheel? 2 clutches? 3 clutches?

When I put on a new Flywheel, does it need to be balanced while on the car? Or is that something that is done at the factory and all I need to do is bolt it on?

__________________
1992 Lamborghini Diablo
1992 Ferrari 512TR

The rubbing is generating sparks amongst other problems. If you are paying attention its not that hard to know if its right or wrong - but you would be amazed how often this happens. See pic of an example.
Certainly should be many to one but this has to be one of those "depends on the abuse level" sort of thing.

-mick

Attached Images

Lamborghini photo's 1[1].jpg (125.7 KB, 81 views)

I don't know why that guy looks happy...I would be pissed! LOL!

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1992 Lamborghini Diablo
1992 Ferrari 512TR

Okay after examining the clutch and the flywheel plus the pressure plate...a 4 year old would have known which way to installed the clutch.

The mechanic in NY that did the install is an idiot. I should have my big Italian friend in NY pay him a visit. I still can't believe this.

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1992 Lamborghini Diablo
1992 Ferrari 512TR

You know all in all this is really fun! I don't like the part of having to fork out money, but for the most part, I enjoy this and it's educational and challenging for me. But all in all I am heading towards independance on not having to rely on sending my car out.

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1992 Lamborghini Diablo
1992 Ferrari 512TR

You should have the guy pay for the damage I know I will . That is tooo bad looks like idiots are all over .