[DeTomaso] New Clutch Issues

[Rob Dumoulin]

Warning!  Flywheels do explode and cause cataclysmic carnage.  My best man
had his break apart reving his 68 Z-28 in his driveway after tuning it.  It
ripped the firewall and hood apart, broke the windshield, tore chunks out of
his driveway, and a chunk ripped through the roof of a house a block away.
 Imagine what it would do to a ZF, deck lid, and  so close to a gas tank.

The funny part was, it was in an Air Force town and the base got blamed for
dropping a part off of one of their jets.  My buddy owned up to it and got
on the news with his car.

On Tue, Apr 6, 2010 at 12:33 PM, sean mundy <seanmundy at hotmail.com> wrote:

>
> Is there any balancing needed on the flywheel after grinding?
>
>
>
> From: JDeRyke at aol.com
> Date: Tue, 6 Apr 2010 02:28:39 -0400
> Subject: Re: [DeTomaso] New Clutch Issues
> To: seanmundy at hotmail.com; detomaso at realbig.com
>
> In a message dated 4/5/10 8:54:59 PM, seanmundy at hotmail.com writes:
>
> It has 3 springs.  Not sure what type they are.....
>
> OK- so its a sprung disc. Dunno- maybe the disc didn't like the new surface
> finish of the flywheel. If so, continued driving will smooth any slight
> roughness or fill in any small depressions. Stock iron flywheels get
> heat-treated in use, which can make extremely hard 'hot-spots' within the
> mass of the flywheel. If the guy doing the sufacing isn't paying attention,
> the grinding wheel will plane over the hard spots, polishing or burnishing
> them but not cutting the surface at those points, or cutting more on one
> side than another causing a degree of tilt. Such a flywheel will then cause
> chatter. A leaking rear main seal or ZF front seal can deposit a few drops
> of oil on the disc which is like a blotter as far as any fluid
> contamination. Extremely dirty hands can do it. Again, the heat of use often
> boils off the contaminates over time- if you can stand the chatter that
> long!
> Back when I was dirt-poor, I took contaminated clutch discs and brake pads,
> and stuck them in a basin of carbon-tetrachloride for a few minutes, then
> drip-dried them in the sun for a day. Those solvent-cleaned parts
> subsequently worked just fine. Note this last "is for entertainment purposes
> only. No recommendations are made etc, blah blah..." And depending on your
> place of residence, it may be impossible to get good chlorinated
> hydrocarbons for any sort of cleaning. There are other chatter causes, too.
> Good luck- J DeRyke
>
>
>
>
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-- 
Rob DuMoulin
904.476.8744
rob at dumoulins.net