Hello, I have a Brat model 88' with ea71 engine.

 

Last weakend the engine becam warm and i saw a water stream came out from

 

the engine. When i looked closer i saw it was from a narrow pipe which located

 

under the carburator and behind the disterbutor. I think it was sealed with a

 

tube that got ripped due to the warm engine.

 

My qustion is how can i seal it, is there and stock part that will do this?

I believe you are describing the 5/16" bypass lines under the intake. Just get some standard 5/16" fuel line to replace them. It's common for them to blow with age and even more so when overheated or run hot.