• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

How important is rubber boot on clutch M/C

Share this page

ncbugeye

ncbugeye

Jedi Warrior
Offline
I was poking around underneath NCBugeye, and happened to touch the rubber boot on the clutch slave cylinder. The whole thing just crumbled to dust in my hand. Just the rubber boot itself, everything else seems to be in working order. It amused me to wonder whether, since NCBugeye is unrestored, it could have been the original 1958 part...

Is this a "must fix before driving again" problem? I dread having to disconnect and bleed the clutch system, there have been so many horror tales told on this forum about this.
 
You MAY be able to replace it without the re-bleeding drill as long as the piston stays in th' bore. But replace that boot. The assembly is down there inna dirt and crud, waay to easy for junk to accumulate and score the bore of the cylinder without it.
 
Snould not be a problem with piston comming out, Just remove old rubber and replace with new. The back plate on the MC actually holds the stuff in.
 
He said Master cylinder but since he's under the car I assume he meant slave cylinder and I'd think if you disconnect the pushrod from the throw out lever, slip the pushrod out, rubber off, new on and reverse, you'd be fine, just don't touch the clutch in the meantime, even then there's a snap in there I believe.
 
And a little brake assembly lube grease makes the piston rod to boot movement easier, may help with installation also.
 
I think your supposed to grease the pushrod end where it contacts the piston and yes, the whole pushrod is probably a good idea to grease.
 
Slave cylinder piston does have a clip ring to hold it in. I defy you to get the piston out while under the car.
 
Yes, I blundered, should have said slave cylinder. It's the one you can reach from underneath. Sorry for the confusion.

Whoooooops!
 
jlaird said:
Slave cylinder piston does have a clip ring to hold it in. I defy you to get the piston out while under the car.
Click to expand...

Can I take my snap ring pliers down there with me?
I rebuilt mine "in sit u" from underneath. Easy peasy.
But yep, with the ring in there the piston isn't coming out.
 
Hmmm....interesting. My bugeye doesn't have a snap ring. I actually had the @#*&^% piston come out once, when there was a clutch problem. (Loose adjusting screws on the pressure plate let the fingers get too low.)
 
Back
Top