Hi.

A few weeks ago I observed that after a few 1000 km the cooling water tank is getting empty. I thought the water pump is the guilty so I replaced it with a new. After for a few week everything looked fine but now the water is gone again. I already ckecked the pipes but no any sign of leakage. I checked the oil but no any white "mud" inside. The only thing what I guess is the cup of the water tank. What is that is not sealing well?
I hope its not the manifold gasket. ( This is the right name?)

Anybody any idea? I'm out now.

THX. Hurrican.