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Another breakdown, clutch this time

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Ricey30 Avatar
Ricey30 Phil R
Chessington, Surrey, UK   GBR
Starting to get annoying what with broken prop shafts and cooling issues!

Today brought a blown out clutch slave cylinder.
Basicly lost clutch pressure, looked under car loads of fluid on the floor.

After getting jack and tools and going back in the van, on removing the slave cylinder the piston and traveled past the end if the Slave cylinder and was rattling around in the bell housing along with the spring and front seal.

Put back together quick bleed and I could drive it home.

Anyone else had this ? Any ideas why? It’s a brand new cylinder. Am I pushing too hard?

Your thoughts greatly received

Phil

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mgv8glen Avatar
mgv8glen Gold Member Glenn Towery
Dover, DE, USA   USA
When you were putting it together did you make sure that the S/C piston was in the middle of the S/C travel? There are different length pivots & T/O bearing collars & I have seen flywheel faces cut & the piston in the S/C sat too far out. I always make sure that the clutch fork sits before pivot before I bolt it all together for the last time. I have welded a 1 inch 5/16 more rod to the factory push rod were the S/C piston sat were it should, in a car that someone else built.

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Ricey30 Avatar
Ricey30 Phil R
Chessington, Surrey, UK   GBR
Glenn

Great point that would make a lot of sense that the rod is a bit short

I certainly didn’t do anything to the piston position, just bolted it on and away I went

It did happen after a couple of fast gear changes

Getting the clutch rod out to weld it is a nightmare, do you think I could add an additional cup to the S/L piston to increase the travel of the piston without it passing its max travel?

Cheers Phil

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mgv8glen Avatar
mgv8glen Gold Member Glenn Towery
Dover, DE, USA   USA
I have used a hole saw & drill to cut out the back of the bell were I can get to the clip that holds the rod in place. You will not weaken the bell doing this. FWIW I use a TR6 slave cyl. (1"winking smiley the SD1/TR8 slave is too small (15/16) & the clutch pedal it too hard to push with the stock MGB master cyl.

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v8mgb Avatar
v8mgb Gold Member Jim Miller
Saint Joseph, MI, USA   USA
1978 MG MGB
You may also want to consider installing a clutch pedal stop block to limit the total travel of the slave cylinder.

I have a block bolted to the floor board that is about 1.5 inches high.


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Ricey30 Avatar
Ricey30 Phil R
Chessington, Surrey, UK   GBR
Guys great ideas I might look at the clutch bolt under the pedal and see what biting point is. Or add a bit to the piston

Only good thing was I took s mate out in it abdvup to the clutch failing his face and smile said it all �

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