M/C cap gasket

[Tinwoodsman]

I have been looking everywhere for a M/C cap gasket. Anyone have any leads?

 

[3rdmdqm]

What is an M/C cap gasket?

 

[shenkmen]

Master Cylinder?

 

[nk14zp]

I used an o ring on my master cylinder cap.

 

[3rdmdqm]

Is there supposed to be a gasket or O-ring there? I'm not sure if mine has one or not now that you mention that. Doesn't it just have thread sealant on it?

 

[73m819]

no, dont use sealent, to much of a chance of it getting into the B/C and the brakes and pluging something up

 

[JDToumanian]

My new one came with a copper washer on it..... I'd go that route, maybe NAPA or a plumbing supply would have one big enough.

Jon

 

[Bill W]

I installed a brake fluid resevoir on my firewall and wanted to make sure the m/c cap did not leak being now it had some head pressure on it so I went to plumbing section of my hardware store and bought 2, 1 1/4" slip gaskets that go on a sinks p-trap., I took one of the gaskets and let it ( and a piece of 1/4" fuel hose) soak in silicone fluid for 3 months while I redid my deuce to make sure it was compatible and it works fine no leaks to date and its been about 2 months since I installed the resevoir, Heck I still have that ( other) gasket soaking in fluid now

 

[Tinwoodsman]

I have been searching for a copper washer/gasket but have not had any luck as yet. I was sure McMaster Carr would have one but that is the first time they have failed me.

 

[cbvet]

If the sealing surfaces on the cap & master cylinder are reasonably smooth, a simple "o" ring works fine.
I think the original type copper gaskets are available at NAPA.