Flywheel rattle

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Jun 8, 2007 | 08:27 PM

#21

5abivt

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Joined: May 2002

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From: Toronto ontario

I was under the impression the dual mass was solely designed for the c4 to Reduced the ZF tranny rattle. I dont think c5s and other branded sports cars have dual mass fws these days.

Jun 8, 2007 | 08:54 PM

#22

CentralCoaster

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Joined: May 2002

Posts: 24,337

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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed

Quote:

Originally Posted by 89 Paul in Cal

Weld the 2 masses together?
Will shock the driveline component into premature wear if not breakage(spindles). (the clutch disc has no sprung hub)

Yeah, so what. Lots of people are running the unsprung hub and 1-pc flywheel. I'm one of em. Seems like a tiny bit more clutch slip on launch than what I had before, but that could be a number of factors.

Jun 8, 2007 | 08:55 PM

#23

CentralCoaster

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Joined: May 2002

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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed

Quote:

Originally Posted by LD85

OK, I stand corrected, then what is all the talk about coolant from a blanchard grinder eating the rubber? Didint someone post a pic of a disc they had torn apart that had rubber in it?

The only people I've seen post this info were the ones regirgitating it, kind of like a few dozen other things on here...

Jun 8, 2007 | 09:47 PM

#24

jimmers

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Joined: Mar 2005

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From: Winnipeg Manitoba, Canada

Quote:

Originally Posted by Pryderei

If the noise is happening clutch in our out.. something is wrong. My guess is the dual mass does need a replacement. Does it make noise when accelerating lightly ? Under acceleration the dual mass will move accordingly in the direction of motion and it should be quiet unless youre in too low of a gear and under load.

I use a single mass and it is loud at low rpms under load and at low idles BUT when i push the clutch in.. all goes silent. If you are getting a rattle all the time some thing could be touching the exhaust? check to see if anything in the driveline is loose?

I don't want to judge your mechanic.. but welding the dual mass together is the stupidest thing I have ever heard. WHy have a 45 lb tank flywheel welded to act like a single mass when you can buy a single mass for cheap and save 38 lbs ? A dual mass has stuff in it fuild or ball bearings or rubber etc that can deteriorate over time.

The rattle goes away if you raise the rpms up a bit. So under acceleration the rattle is gone. As far as rattling, we have checked many times and have found nothing. About welding it together, I can be wrong. Again, I am the middle man just relaying information.