Could someone please stroke your clutch for me? : MGB & GT Forum : The MG Experience

Could someone please stroke your clutch for me? #1
rpmerrill Rich M Easton, MD, USA Sign in to contact 1980 MG MGB "Green Hornet"	Topic Creator (OP) Sep 1, 2014 10:25 AM Joined 9 years ago 476 Posts

More adventures and questions regarding my new car.
Underneath the car, looking at the clutch actuator..... how far should I expect the clutch cylinder to move during a stroke? The car is up on blocks waiting for some brake parts... damn holidays. So, I decided to approach some other tasks. Bleed the clutch.

I think I got all the bubbles out. But After I sent my wife back in, I started to think.... the stroke was quite small when I didn't open the bleeder. Before I expend a lot of household goodwill, I thought I'd ask this question.

Thanks.

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Re: Could someone please stroke your clutch for me? #2
jimac Jim Macaulay Concord, MA, USA Sign in to contact 1974 MG Midget 1979 MG MGB MkIV	Sep 1, 2014 10:40 AM Joined 12 years ago 629 Posts

Rich, Hopefully others will chime in, But I honestly believe I've heard here on

the forum that you should expect about 3/8" of an inch of travel from the

slave cylinder push rod. Hope this helps, Jim Macaulay

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Re: Could someone please stroke your clutch for me? #3
29desoto M Wayne Sanders Otis, OR, USA Sign in to contact 1965 MG MGB V6 Conversion "Carmine" 1973 MG MGB GT "Eliza - FIRST PLACE - MG2013" 1984 Chevrolet Corvette "The Green Weenie" 1994 Chevrolet S10 "Lil Red"	Sep 1, 2014 10:47 AM Top Contributor Joined 13 years ago 13,098 Posts

3/8 is the normal number to hear.

Didya check the clevis pins that hold the arm in there? A little play here, and a little play there, and you got a sloppy clutch!

Ask me how I know! eye rolling smiley

Wayne Sanders
Rose Lodge, OR
(TD 4288)

"I don't care to belong to any club that accepts people like me"-joined Willamette Valley Club in 2011

79/65 MGB - Carmine- V-6 - T-5

This car is now very nearly completely done. Sure to find something else, but not now.........And 12 years later, I'm starting to fix things that were new when we built the car. It's pretty well de-bugged!

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Re: Could someone please stroke your clutch for me? #4
dickmoritz Dick Moritz Philly 'burbs, PA, USA Sign in to contact	Sep 1, 2014 10:49 AM Top Contributor Joined 14 years ago 26,272 Posts

Ditto on 3/8 or a little more...

Dick

Errabundi Saepe, Semper Certi
(Often wrong, but always certain)

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Re: Could someone please stroke your clutch for me? #5
ohlord Rob C A tiny Island off the coast of Washington State, N.W., USA Sign in to contact 1957 Land Rover Series I "EYEYIYI" 1957 Land Rover Series I "OVRLND" 1971 MG MGB 1971 MG MGB "Bedouin 2" & more	Sep 1, 2014 12:50 PM Top Contributor Joined 12 years ago 28,878 Posts

A bit more than 3/8
as stated make sure clevis pins at rod and master are in good shape,they are sacrificial items meant to wear out in place of more expensive parts.
If everything is in good order a transmission should be able to be shifted between gears both upshift and downshift with but a 3/4-1 inch in depression of the clutch pedal.

LNDRVR4X4.COM
Home of Project "INCARN8'

1957 Series 1 Land Rover electric VEHICLE CONVERSION

FIXITUPCHAP.COM
FIXITUPCHAP INCORPORATED

RD3 Radar/ Electronic Warfare Technician
VIETNAM 1969-1972

clevis good and bad.jpg 5.1 KB

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Re: Could someone please stroke your clutch for me? #6
rpmerrill Rich M Easton, MD, USA Sign in to contact 1980 MG MGB "Green Hornet"	Topic Creator (OP) Sep 1, 2014 02:05 PM Joined 9 years ago 476 Posts

Well, not even close. I'll get my neighbor over for a pedaling session when the brake job is done.
Thanks

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Re: Could someone please stroke your clutch for me? #7
herculesmgb1971 gerard boulanger Hercules, CA, USA Sign in to contact 1971 MG MGB MkII	Sep 1, 2014 11:58 PM Joined 12 years ago 924 Posts

Almost 1/2", or 11mm

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Re: Could someone please stroke your clutch for me? #8
rpmerrill Rich M Easton, MD, USA Sign in to contact 1980 MG MGB "Green Hornet"	Topic Creator (OP) Sep 3, 2014 09:23 PM Joined 9 years ago 476 Posts

One more thought about my bleeding problem.
The clutch bleeding came to the fore when I was waiting for my rear brake parts to arrive. Since the car was up on the jackstands and the underside was presenting itself the clutch issue came to mind.

BUT so far i have been unable to purge the air and get a good slave cylinder stroke.

I was thinking today, at my part time job, why that might be.
Duh, the rear end of the car is about a foot to 15 inches up in the air, and the front is on the ground. Maybe the nose down tilt is my problem???

Comments?

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Re: Could someone please stroke your clutch for me? #9
ohlord Rob C A tiny Island off the coast of Washington State, N.W., USA Sign in to contact 1957 Land Rover Series I "EYEYIYI" 1957 Land Rover Series I "OVRLND" 1971 MG MGB 1971 MG MGB "Bedouin 2" & more	Sep 3, 2014 09:35 PM Top Contributor Joined 12 years ago 28,878 Posts

Nope.

LNDRVR4X4.COM
Home of Project "INCARN8'

1957 Series 1 Land Rover electric VEHICLE CONVERSION

FIXITUPCHAP.COM
FIXITUPCHAP INCORPORATED

RD3 Radar/ Electronic Warfare Technician
VIETNAM 1969-1972

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Re: Could someone please stroke your clutch for me? #10
Sprite Lou Lou A. Springfield, OR, USA Sign in to contact	Sep 3, 2014 09:57 PM Joined 15 years ago 7,256 Posts

Rich,

Moss has a decent how-to video on their website/YouTube - informative regarding how to ensure getting that "last bit" of air out of the clutch slave when bleeding. Might be informative for you:

How to Bleed a Clutch Slave

RIP Christopher Allan Roop
RIP Jack Austin
RIP P.J. Lenihan
RIP Peter Cummins
RIP John D. Weimer
RIP Mick McGuire

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Re: Could someone please stroke your clutch for me? #11
mgbheller73 Matt H Park ridge, IL, USA Sign in to contact	Sep 3, 2014 11:06 PM Joined 9 years ago 8 Posts

This thing is a pain to bleed. Clamp the arm to the body so the pin doesn't move and all the pedal bleeding goes to the bleeder and not partially actuating the clutch. Keep an eye on fluid level as it only takes a few pumps to drain it

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Re: Could someone please stroke your clutch for me? #12
ChuckoldNavy53 Chuck Green Annapolis, MD, USA Sign in to contact 1969 MG MGB MkII "Bee"	Sep 5, 2014 08:23 AM Joined 12 years ago 679 Posts

Measured last night, 5/8 inch travel.
Chuck

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Re: Could someone please stroke your clutch for me? #13
ohlord Rob C A tiny Island off the coast of Washington State, N.W., USA Sign in to contact 1957 Land Rover Series I "EYEYIYI" 1957 Land Rover Series I "OVRLND" 1971 MG MGB 1971 MG MGB "Bedouin 2" & more	Sep 5, 2014 09:26 AM Top Contributor Joined 12 years ago 28,878 Posts

5/8 travel would be nearly 16mm and it would push the throw out bearing too far into the forks on the pressure plate There is only so much travel a slave cylinder can attain. And only so much travel you need to disengage the clutch. 11mm a bit more than 3/8 below that you have problems shifting. Above that you have excessive wear on clutch parts.

LNDRVR4X4.COM
Home of Project "INCARN8'

1957 Series 1 Land Rover electric VEHICLE CONVERSION

FIXITUPCHAP.COM
FIXITUPCHAP INCORPORATED

RD3 Radar/ Electronic Warfare Technician
VIETNAM 1969-1972

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Re: Could someone please stroke your clutch for me? #14
rpmerrill Rich M Easton, MD, USA Sign in to contact 1980 MG MGB "Green Hornet"	Topic Creator (OP) Sep 6, 2014 08:22 PM Joined 9 years ago 476 Posts

It is all ok now. I rebuilt the slave cyl. And
used the pos pressure bleeder and it worked like a champ.
New pin end pushrod. Only a little wear in the old ones.... but for 5 or 6 bucks...what the heck.

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