[DeTomaso] Clutch help

Will Demelo wdemelo at cogeco.ca
Fri Jun 25 22:24:13 EDT 2010


Where's a link to the power bleeder?
Will
----- Original Message ----- 
From: "boyd casey" <boyd411 at gmail.com>
To: <tmshinro at aol.com>
Cc: <detomaso at realbig.com>
Sent: Friday, June 25, 2010 7:53 PM
Subject: Re: [DeTomaso] Clutch help


> Again I am not an expert and although I did solve my problem I never was
> able to find out what the problem was. Anyway I would be more inclined to
> think you haveing air leaking in then having fluid leaking out. This could
> be furthur evideb\ced by the fact that air in you clutch line will cause 
> the
> clutch "spongy" and repeated  pumping the clutch pedal will compress the 
> air
> in the system until the clutch works, then after sitting for a while the 
> air
> will expand again and the clutch will stop disengaging again.  Have you
> gotten the power bleeder yet? If not you need to do that. The power 
> bleeder
> takes around two quarts of fluid and pushes it through at around 45PSI. 
> All
> I know is after I replaced my fittings and  used the power bleeder my
> problem was solved. If you look at the number hours you have spent and the
> frustration as well as the fact that you cant drive your car the Power
> bleeder is a small investment to make to get the problem solved.
> Boyd
>
> On Fri, Jun 25, 2010 at 7:24 PM, <tmshinro at aol.com> wrote:
>
>>
>>  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 things 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 pushrod 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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