Clutch master cylinder - gasket for firewall?

[djohnsn]

The exploded view of the clutch linkage in GM's literature shows a gasket between the clutch master cylinder and the firewall (pn 15592279). This gasket is no longer available from GM. My local parts stores can't get it either. Has anyone else had this problem?

Also, I have heard that I should not use a replacement clutch master cylinder (Raybestos, etc). Can anyone tell me why? Is is really worth twice the price to get one from GM?

 

[cegusman]

I have used parts store rebuilds and had no problems. As for the gasket, I don't run one. If you really want one, just use some RTV silicone.

 

[dyeager535]

I think as with any aftermarket parts, the cylinders are a crap shoot. Mine was in place less than 5 years (not much usage, could be part of the prob, but shouldn't) and was leaking out the seal in the back, into the cab.

I wouldn't pay double for the GM piece for sure. Gaskets, trim, yes, not a clutch master though.

That gasket must come with the MC, I didn't have to buy a gasket.

 

[djohnsn]

I thought that the gasket should have been included with the master also. I even had the parts guy double check another box, but no gasket. I have not decided how critical it is though.

 

[dyeager535]

It's not critical.

Only thing its there for is to keep things out of the cab which is really just air. If the cylinder leaks or anything, it will come out on the inside anyways.

I'd probably just silicone it so no cold feet.