Thermostat Housing Cap Gasket

[jKrashnburn]

As I reassemble my thermostat housing I'm baffled by how a seal is meant to be achieved between the cap and the base of the housing.
Is there a gasket and/or o-ring that is/are meant to go here? If so, who sells it/them? Nothing appears when the usual vendors' catalogues are searched.

Any suggestions would be much appreciated.

John

[dirkbalter]

Item # 43, O-ring.
https://www.sls-hh-shop.de/main/en/mercedes-230-280sl-w113-/50-cooling-system/50-c-cooling-system-280sl

[jKrashnburn]

Thanks Dirk......now that I inspect the the actual thermostat, it quickly becomes obvious that the o-ring is normally sold together with the thermostat, hence no separate listings.

Great parts illustration from SLS; must remember that!

John