T6 Clutch Master Cylinder Unavailable, What Options to get it driving again

[indy4x]

2019 T6 4Mo and the clutch master cylinder is goosed

Shouldn't be a problem just replace with a new one. However, there seem to be none available, anywhere

So far I've tried Main Dealer, GSF, ECP, local factors, and lots of Internet searching and everyone is out of stock

VW said they are on back order from Germany but they don't have any and neither do Sachs who make them

The part number for what I'm looking for is


VW part no 7E0 721 401F

Sachs pt no 6284600746

It is the MC with the internal switch/sensor

There are plenty of MC available without the integral switch/sensor, what would be the possibility of using an external switch to at least get me back on the road and how would it be wired

Picture of the plug



Putting a meter across the terminals show open circuit no matter which pair of wires I probe and that is with the MC piston pushed in or out

 

[manfrotto]

Could you get a used one from a braekers yard? Not ideal, but would get you working again.

 

[Sasquatch]

Is there a rebuild kit? A new one would be my choice, but if available a rebuild kit might get you back on the road.

 

[Paynewright]

There are also companies around that will refurbish brake components.

 

[indy4x]

@manfrotto that's work in progress, have a few places to call today

@Sasquatch I've been looking how the MC comes apart and it's not designed to come apart without destroying it

 

[Sasquatch]

I've no experience with the particular ones, but typically if you remove the boot over the pushrod it revelas a circlip beneath.

 

[indy4x]

I've rebuilt loads of brake and clutch master cylinders over the years and yes they had a circling holding the push rod in which once removed you could pop out the piston and replace the seals

I'll take a picture but essentially the MC is plastic, the push rod goes through a plastic end caps that clips inside the MC and there is no way I can find to release the clips on the end cap

One of my bright ideas was to strip the MC off mine and see if I could use the seals out of the new MC I got from GSF.

Looks like the only way to dismantle is going to involve destroying part of the MC

 

[indy4x]

On the plus side, have found a S/H MC at a breakers in Evesham, its a 3hr round trip but I need the van sorted this weekend

 

[indy4x]

Quick update, S/H MC collected and fitted

Bit of a faff to get it bled, had to remove the bleed nipple from the T piece as I couldn't get any fluid through

I did have a thought, I could have fitted the new MC from GSF (it doesn't have the integral switch) plugged my old MC into the wiring connector and just push the piston in by hand to start the engine

 

[Paynewright]

Will you wait/see how trustworthy the replacement is before seeking refurbishment of the old one or buying a new one?

 

[indy4x]

Once a new one becomes available, I will purchase one and stick it on the shelf ready for if/when it goes again

Not sure refurb is an option as there appears to be no overhaul kits and the MC is designed not to come apart

Having previously rebuilt hydraulic components, sometimes it can be false economy to even try