[Jacques1960]

I’ve just acquired a NOS indicator assembly which appears complete (and hopefully correct for a ‘36 Phaeton).

The reservoir bulb has a flange which needs, on its lower side, to seal to the face of the water pump receiving port and, on its upper face, to the underside of the sealing nut / bushing.

Should any sealant be added to either surface of the bulb flange, or is it just a crush seal ?

System is not pressurized.

Thank you.