[Healeys] sleeved thermostat directional?

[Oudesluys]

No front/back orientation. There is no need to fit an O-ring. Some 
people do, I have no idea why as it should be a fairly good fit in the 
housing. Anyway the seepage will be far less than the flow through the 
small ball valve. So only a gasket is needed for the thermostat gasket.
Kees Oudesluijs

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