Dear Vintage - Opel friends,
I'm pleased to be able to offer you the following article:
Paper seal thermostat housing on cylinder head, Opel 24V C30SE, C30XEi, C40SE
The original rubber seal ring, which is responsible for sealing between the thermostat housing and the cylinder head, cannot always fulfill its task to a satisfacory level. For this reason, we have created this paper seal as a supplement. After you have installed this seal, you can confidently rule out this sealing surface as the source of trouble when losing coolant :-) Made by edelschmiede!