Testarossa question about flywheel

Not normal to replace flywheel, but resurface (or grind ) is normal.

 

No, the flywheel is individually balanced by itself so not replacing it will not introduce an imbalance. It's the pressure plate that is balanced as an assembly with other components (so if you just replaced the pressure plate only = that could introduce an imbalance). The description of the balancing issues is on page E6 in the TR WSM (I don't have access to the TR WSM at the moment, but will post page E6 later - or someone please do it now if you've got it).

 

What other components is the pressure plate balanced with?

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I'll post page E6 later, but, IIRC, the assembly that get balanced together is "pressure plate (1) + spacer between pressure plate and flywheel (7) + spacer between clutch discs (8)".
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Typically sold as a set.

 

Here's page E6 describing the balancing situation for the TR clutch components. I didn't recall that correctly -- the pressure plate is also individually balanced by itself. It's the intermediate components, 7 & 8, that are "balanced together":
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yes, good to use the old flywheel. Would recommend to re-surface the flywheel while you are there. Do you have a photo? It may need to be resurfaced.

 

The proper procedure to follow should be to remove the flywheel and machine it to the proper finish and balance it by itself . Then mount the press plate with the proper bolts to the flywheel and balance the press plate by making the corrections to the press plate this will ensure two things 1 that the flywheel is properly balanced by itself or (neutral balanced as correctly described ) and 2 that your new press plate or clutch cover is also balanced neutral. The reason for this procedure is simple you want all the components to be balanced individually so as to not have any harmonics developed by any component that will be out of balance on its own. Please be advised something very important many folks will say all new parts are ready to install out of the box all I can say to that is we have been balancing components both racing and OEM for the past 25+ years and very rarely do you get parts that will install with no problem. You should be able to have any experienced shop in your area help you if for any trouble or have any other questions give me a call 1-305-884-5368 and best of luck to you Sincerely Laz Mesa

 

Don't forget to inspect the flywheel ring gear teeth, if they have knife edges, the ring gear should be replaced. It's not a difficult job but obviously should be done before resurfacing and balancing.

 

The flywheel has hot spots all over it and needs to be resurfaced. But it looks like there is a crack at about the 9:00 area. Is the black line a crack in the surface or just a hair or stain?
If it is a crack, I would recommend replacement of the flywheel. Why is it covered with fluid/oil? Was it like this when you removed it? If so, you need to repair the source of the leakage as well.