Heater takeoff

Having studied several photos posted on this forum of beautifully prepared engines, I have noticed that the temperature sender appears to be fitted to the front of the thermostat housing and the heater takeoff to the rear. On my +2 these are reversed. Can anyone tell me if this will affect the guage readings or trickle of warm air from the heater?
My assumption is that it shouldn’t make any difference… :neutral_face:

ron
1968 +2

Ron,

It doesn’t. It’s just easier if the heater valve is behind the sender because if it’s in front, the heater hose can interfer with it. Rather than going straight back, I would guess that your heater hose dips below the sender. The cable control must go aroung the sender as well.

This one has been discussed before. On the +2 the heater valve is integral to the heater/demister unit. The cylinder head gets only the water temperature sending unit and an elbow fitting to the heater/demister. The Elan and +2 workshop manuals don’t do much to clarify the installation. Both manuals suggest that the sender unit goes in the rearmost port. I think Frank is correct that it matters little which port gets the outlet to the heater and which gets the sender. My suspicion is that the rearmost port was originally intended for the water temperature sender because it was a capillary tube affair and you don’t want to snake the capillary around too many sharp bits.

Thanks for your help guys, I guessed that would be the case but it’s nice to know for sure.

Ron

1968 +2