[DeTomaso] Clutch help

hemipanter at hemipanter.se hemipanter at hemipanter.se
Sat Jun 26 12:39:46 EDT 2010


This is a marginal movement for a regular "long" clutch. A multi disc
racing clutch needs about about 10mm at the disc bearinng. My own diafragm
clutch needs 1,5" at the slave.
I should like to see about 0,66" in your case.
Goran
>  I measured 0.540 inches of travel at the pin that connects the slave
> pushrod to the clutch lever.  I taped a wire to the bellhouse that
> aligned with the center of the pin at rest and measured the distance from
> the wire to the center of the pin when fully extended.  At this point I
> had 0.022 of clearance between the clutch disk and pressure plate and the
> clutch disk moves freely.  I have minimal free play at this position.
>
> How do these measurement compare to a working clutch?
>
> Thanks,
> Tom
>
>
>
>
>
>
>
>
> -----Original Message-----
> From: Will Demelo <wdemelo at cogeco.ca>
> To: tmshinro at aol.com
> Sent: Fri, Jun 25, 2010 7:01 pm
> Subject: Re: [DeTomaso] Clutch help
>
>
> How much "throw" do you have on the bellhousing arm?  Get someone to
> measure it when you deress the clutch pedal. Lets compare that to a
> working clutch.
> Will
> ----- Original Message ----- From: <tmshinro at aol.com>
> To: <detomaso at realbig.com>
> Sent: Friday, June 25, 2010 7:24 PM
> Subject: [DeTomaso] Clutch help
>
>>
>> First I want to thank everyone that sent me suggestions.   I'm still >
>> trying to figure it out but I have a couple more questions.
>>
>> I started the car the next morning to move the car forward in my garage
>> > after I experienced clutch drag the night before when I pulled the car
>> in > the garage .  Everything worked fine; I was able to shift into all
>> gears > while stationary with the engine running.  When I depressed the
>> clutch > pedal I could "feel" the clutch disengage well before the
>> bottom of the > stroke.  The clutch engaged about half way up when I
>> pulled the car > forward and totally disengaged when I pushed the clutch
>> in when I stopped. > I didn
>> 't take in out because I know I would see clutch drag after 10 to 15 >
>> minutes of driving based on numerous prior test runs.
>>
>> Here's my question - I measure 0.020 inches of clearance between the >
>> clutch disk and pressure plate.  I don't see any separation between the
>> > clutch disk and the flywheel, but when I move the car by hand with the
>> > clutch pedal depressed I can see the clutch disk move between the
>> flywheel > and pressure plate.  Should I be seeing measurable separation
>> at the > flywheel as well as the pressure plate?   From what I have been
>> told I'm > don't have as much separation as I should (0.020 vs 0.030),
>> so I'm > wondering if thi
>> ngs are expanding when hot and consuming what little clearance I have. >
>> Unfortunately, I can't get anymore clearance unless I use up all my free
>> > play (which I've cut down to about 0.060 inches).   Is there enough >
>> heat/expansion between the flywheel/clutch/pressure plate to make a >
>> difference?
>>
>> Also I should mention that the clutch master I installed was one I
>> bought > 10 years ago from Collectors Choice.  The MC sat in my tool
>> chest with the > outlet plugged the whole time time.  I live in Iowa so
>> there were plenty > of humid days that the MC would have seen in my
>> garage.  I disassembled it > prior to assembly and the bore and seals
>> looked good and I could tell that > the seals were tighter that my old
>> one when I manually pushed the push rod > into the bore. I took the MC
>> out a second time to measure the pus
>> hrod and did not see any fluid leaks in the rubber boot.  However, when
>> I > bled the system, the fluid that came out of the bleeder looked clear
>> > through the plastic tube I used but was dark once it was collected in
>> a > plastic bottle.  Is it possible that the seals could have
>> deteriorated > causing blow by?  Would it make sense that blow by would
>> get worse after > cycling the clutch for 10 to 15 minutes?  The fluid in
>> the reservoir is > clear.
>>
>> Unfortunately I didn't think about measuring the bore of the new MC and
>> > comparing it to the old.  I'm assuming they are the same, which if
>> they > are, baffles me because I never had clutch problems before this.
>>
>> The battle goes on.
>>
>> Tom
>> #5186
>>
>>
>>
>>
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