need help with cylinder head!!!!!

[thejake456]

ok, i just got a 85 cr250 for cheep and it needed a new cylinder head gasket. when i received the gaskets, (i got the whole set) there was a tin like peice that was the same shape of the cylinder head gasket. but i dont know where it goes???? or if it goes on at all????

 

[BigRedAF]

It goes between the cylinder and the head...

Make sure your surfaces are clean and use a torque wrench.

 

[thejake456]

does it go on top of the gasket or below it????

 

[MXer666]

you only need 1 gasket. You probably got a kit that covers certain years, and in those years the hd gsk probably changed and they supplied more than 1 hd gsk.

 

[thejake456]

my manual says not to use gasket sealent on my cylinder head. why not????

 

[ysr89]

Gas will eat gasket sealant. You shouldn't need it with a new gasket. Just oil it and torque the bolts to spec. Good luck!

 

[whenfoxforks-ruled]

Convex side up. You can use spray gasket sealers.

 

[thejake456]

Gas will eat gasket sealant. You shouldn't need it with a new gasket. Just oil it and torque the bolts to spec. Good luck!

what do you mean oil it up???

 

[IndyMX]

He most likely means to apply a light coat of 2 stroke oil to the cylinder & piston, reassemble and torque.

Can't really see any reason to oil the head gasket.

 

[ysr89]

Oil cylinder and piston on reassembly. Check for air leaks, or a lean condition will occur, and the piston could seize up.

 

[thejake456]

check for air leaks where???

 

[ysr89]

Between the parts and the gasket surfaces. I.e. where the cylinder meets the cases and where the cylinder head meets the cylinder.

 

[thejake456]

if there is moisture between the gasket and the cylinder head when i put it on would that make it leak coolent. coolent leaking into the jug would do what to the bike? could it make it not run as well???