I removed my heater valve as it had a little corrosion on the body of the valve. I've cleaned it up and it should work fine when put back on the car.

There is a sealing ring(rubber, probably neoprene or viton)between the housing and the heater a bit like a compression olive on a copper plumbing fitting. As you bolt the valve back on the ring is compressed and grips more on the copper heater pipe.

When I pulled it out there was some kind of sealing compound used when it was reasembled many years ago. Looks like it was soft but went hard over time.

I'd like to put it together correctly and have a few questions.
1. Is the rubber sealing ring available and if so where?
2. Should some sort of sealing goo be used and if so what should I use.

Any other info would be appreciated.

Cheers.
Nick.

SilverfoX. YOU won't have too much trouble finding one suitable. Speaking from the point of view of a Plumber. I would suggest using some decent rubber grease which should be heat proof rather than any silicon or any material that would adhere to all surfaces as it could prove difficult getting off again sometime later. The "O" ring has to have ID size small enough to stretch over the pipe and large enough section to also seal onto the control valve face, once screwed up to the heater case. about 5/8 ID x 3/4 OD , you check that with a bit of trial and error. Make sure the Quality of the 'O' ring is good too not one that as Dr Terry has hinted at that will go hard over time with the temperature and eventually leak....all best....Jack

Whoops sorry Silverfox that should be approx 5/8 ID x 7/8 OD not 5/8 ID x 3/4 OD.....Jack