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Finally I have started the disassembly and inspection of the clutch
hydraulic system. I decided not to drive the car the last two days because
the clutch issue seemed to be getting worse or at least the recovery was
becoming slower. At first, after a highway drive, 80% of the clutch
resistance would be lost but would completely recover after 1-2 pressings of
the pedal. But lately, it was taking even more.
I started by draining the fluid and then removing the slave cylinder. There
was some liquid within the dust boot to already indicate possible problems
but it was the disassembly that revealed the answer. And Barney was spot on.
Inside this fairly new slave cylinder (bought new from a vendor 5-6 years
ago) with shiny inner bore and rubber seal, there was no spring! And yet no
issues over the years until I replaced the master cylinder a few weeks ago.
Fortunately, I had an old slave cylinder handy - just had to free the piston
that was stuck to the bore due to corrosion to harvest its spring. I'll
start the reassembly this afternoon and maybe get in a test drive before the
rain arrives.
David Councill
64 B
67 BGT
72 B
From: Barney Gaylord [mailto:barneymg@mgaguru.com]
Sent: Tuesday, November 8, 2016 5:07 PM
To: David Councill; 'PaulHunt73'
Cc: mgs@autox.team.net
Subject: Re: [Mgs] [MG-MGB] Clutch problems with thermal component
Clutch pedal goes to floor on first stroke after a long rest, but works
correctly otherwise. This implies that the clutch slave cylinder piston has
retractred too far, requiring one pedal push to reset it to correst
position.
The clutch slve cylinder should have a light force compression spring
inside. See here: http://mgaguru.com/mgtech/hydraulics/ht107.htm
If that spring is missing the slave cyinder may still work, but the piston
might retract farther than intended during a period of dormancy (long drive
without using the clutch). You might want to open the slave cuinder to
check on what's inside.
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Finally I have started the disassembly and inspection of the clutch =
hydraulic system. I decided not to drive the car the last two days =
because the clutch issue seemed to be getting worse or at least the =
recovery was becoming slower. At first, after a highway drive, 80% of =
the clutch resistance would be lost but would completely recover after =
1-2 pressings of the pedal. But lately, it was taking even =
more.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I started by draining the fluid and then removing the slave cylinder. =
There was some liquid within the dust boot to already indicate possible =
problems but it was the disassembly that revealed the answer. And Barney =
was spot on. Inside this fairly new slave cylinder (bought new from a =
vendor 5-6 years ago) with shiny inner bore and rubber seal, there was =
no spring! And yet no issues over the years until I replaced the master =
cylinder a few weeks ago. Fortunately, I had an old slave cylinder handy =
– just had to free the piston that was stuck to the bore due to =
corrosion to harvest its spring. I’ll start the reassembly this =
afternoon and maybe get in a test drive before the rain =
arrives.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>David Councill<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>64 B<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>67 BGT<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>72 B<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p> </o:p></span></p><div><div =
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0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Barney Gaylord [mailto:barneymg@mgaguru.com] <br><b>Sent:</b> Tuesday, =
November 8, 2016 5:07 PM<br><b>To:</b> David Councill; =
'PaulHunt73'<br><b>Cc:</b> mgs@autox.team.net<br><b>Subject:</b> Re: =
[Mgs] [MG-MGB] Clutch problems with thermal =
component<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Clutch pedal =
goes to floor on first stroke after a long rest, but works correctly =
otherwise. This implies that the clutch slave cylinder piston has =
retractred too far, requiring one pedal push to reset it to correst =
position.<br><br>The clutch slve cylinder should have a light force =
compression spring inside. See here: <a =
href=3D"http://mgaguru.com/mgtech/hydraulics/ht107.htm";>http://mgaguru.co=
m/mgtech/hydraulics/ht107.htm<br><br></a>If that spring is missing the =
slave cyinder may still work, but the piston might retract farther than =
intended during a period of dormancy (long drive without using the =
clutch). You might want to open the slave cuinder to check on =
what's inside.<br><br><br><br><o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p></div></body></html>
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