Engine Trouble Really strange problem with 80cc engine

[Bikemovile]

Hello again...
I've check the torque of the head bolts, they were as tight as the first day.
Extracted the cylinder head and saw this.
No way to extract the gasket because its stuck with the studs.
It seems to be bended in the middle so I think its loosing compresion.
Its posible to extract the studs so I can extract the gasket for making its 4 holes a little bit bigger????

 

[Gordy]

Hello again...
I've check the torque of the head bolts, they were as tight as the first day.
Extracted the cylinder head and saw this.
No way to extract the gasket because its stuck with the studs.
It seems to be bended in the middle so I think its loosing compresion.
Its posible to extract the studs so I can extract the gasket for making its 4 holes a little bit bigger????

Just order new gaskets or get some copper gasket material and make your own head gaskets. @Wrench has a good method for that.

 

[Bikemovile]

Just order new gaskets or get some copper gasket material and make your own head gaskets. @Wrench has a good method for that.

I can remove the studs?They are welded?

 

[Gordy]

I can remove the studs?They are welded?

No, they're not welded. Just spin 2 nuts on the stud and use the bottom one to back it out.

 

[Bikemovile]

No, they're not welded. Just spin 2 nuts on the stud and use the bottom one to back it out.

Thanks gordy!! that was the plan

 

[Gordy]

Thanks gordy!! that was the plan

No problem. I forgot to answer your question about pulling them while explaining the gaskets lol

 

[Wrench]

The gasket only appears to be bending in the middle because of the raised (ring) sealing surface on the head/cyl
It's also a good idea to make sure the gasket isn't binding on the bolts

 

[Bikemovile]

Also detected that the thread in the engine where this bolt fastens is damaged so I only can tight it a little bit. It can be loosing compression because of it??
I'm talking about the one with the tool on it.

 

[Bikemovile]

Help with this??

 

[Gordy]

It could cause an air leak.