[DeTomaso] Clutch help

pantdino at aol.com pantdino at aol.com
Fri Jun 25 19:56:53 EDT 2010


Did you say you can get the clutch to fully disengage by pumping it?

Is the lever arm on the ZF roughly perpendicular to the axis of the slave cylinder and pushrod or is it tipped toward the slave cylinder?






-----Original Message-----
From: tmshinro at aol.com
To: detomaso at realbig.com
Sent: Fri, Jun 25, 2010 4:24 pm
Subject: [DeTomaso] Clutch help



First I want to thank everyone that sent me suggestions.   I'm still trying to 
igure 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 
xperienced clutch drag the night before when I pulled the car in the garage .  
verything worked fine; I was able to shift into all gears while stationary with 
he engine running.  When I depressed the clutch pedal I could "feel" the clutch 
isengage well before the bottom of the stroke.  The clutch engaged about half 
ay up when I pulled the car forward and totally disengaged when I pushed the 
lutch in when I stopped.  I didn't take in out because I know I would see 
lutch 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 
nd pressure plate.  I don't see any separation between the clutch disk and the 
lywheel, but when I move the car by hand with the clutch pedal depressed I can 
ee the clutch disk move between the flywheel and pressure plate.  Should I be 
eeing measurable separation at the flywheel as well as the pressure plate?   
rom what I have been told I'm don't have as much separation as I should (0.020 
s 0.030), so I'm wondering if things are expanding when hot and consuming what 
ittle clearance I have.  Unfortunately, I can't get anymore clearance unless I 
se up all my free play (which I've cut down to about 0.060 inches).   Is there 
nough heat/expansion between the flywheel/clutch/pressure plate to make a 
ifference?
Also I should mention that the clutch master I installed was one I bought 10 
ears ago from Collectors Choice.  The MC sat in my tool chest with the outlet 
lugged the whole time time.  I live in Iowa so there were plenty of humid days 
hat the MC would have seen in my garage.  I disassembled it prior to assembly 
nd the bore and seals looked good and I could tell that the seals were tighter 
hat my old one when I manually pushed the push rod into the bore. I took the MC 
ut a second time to measure the pushrod and did not see any fluid leaks in the 
ubber boot.  However, when I bled the system, the fluid that came out of the 
leeder looked clear through the plastic tube I used but was dark once it was 
ollected in a plastic bottle.  Is it possible that the seals could have 
eteriorated causing blow by?  Would it make sense that blow by would get worse 
fter cycling the clutch for 10 to 15 minutes?  The fluid in the reservoir is 
lear.  
Unfortunately I didn't think about measuring the bore of the new MC and 
omparing it to the old.  I'm assuming they are the same, which if they are, 
affles me because I never had clutch problems before this.
The battle goes on.
Tom
5186
 

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