Heater control valve

[triumphelan]

Any ideas as to the thread size ,where it screws into the head .
Any ideas on dumping the valve and fitting a 12volt control valve .

[msd1107]

I think what you are referring to is 036P 6003, Heater Valve. Unfortunately, none of my reference material gives the size or thread pitch for this. It should screw into 036K 6101, Thermostat Housing. Anybody else want to measure theirs?

Since it is a valve, and to a rough degree controls the amount of hot water that goes to the cabin, it is necessary.

I presume that you would like to control the amount of water flow electrically, and use the cabin temperature to control the amount of flow. That would serve to moderate the temperature increase when the car goes up a hill, and freezing when it goes down a hill.

I get around the problem by just not using the heater! Of course, in southern CA, I can get away with this.

[fatboyoz]

John,
Search these previous messages for the info' you want:

Re: Heater valve thread

16694 Re: Heater Control valve Roger Sieling Mon 7/22/2002
16693 Re: Heater Control valve peteandjanet Mon 7/22/2002
16678 Re: Heater Control valve Roger Sieling Mon 7/22/2002
16654 Re: Heater Control valve Tim or Jo Mullen Sat 7/20/2002
16646 Re: Heater Control valve peteandjanet Fri 7/19/2002
16645 Re: Heater Control valve Fred Talmadge Fri 7/19/2002
16644 Re: Heater Control valve Roger Sieling Fri 7/19/2002
16643 Re: Heater Control valve Crowther, Mike Fri 7/19/2002
16642 Re: Heater Control valve david_cusworth Fri 7/19/2002
16616 Heater Control valve Crowther, Mike Thu 7/18/2002

They mention 3/8" BSP (British Standard Pipe) as the thread size.
The valve is fitted into the head below the thermostat housing. There are two holes in this location. The forward hole is for the water temp' sensing bulb and the rear hole is for the heater valve.
It is interesting to note that heater valves, from various other applications, can be cannibalised to overhaul the lotus valve. This can be done insitu by drilling out the pop rivet that locks the valve body in place and replacing the diaphram. Or conversely there is always the correct valve for sale on the US Ebay site.
Regards Colin 68S4.

[fatboyoz]

John,
Search these previous messages for the info' you want:

Re: Heater valve thread

16694 Re: Heater Control valve Roger Sieling Mon 7/22/2002
16693 Re: Heater Control valve peteandjanet Mon 7/22/2002
16678 Re: Heater Control valve Roger Sieling Mon 7/22/2002
16654 Re: Heater Control valve Tim or Jo Mullen Sat 7/20/2002
16646 Re: Heater Control valve peteandjanet Fri 7/19/2002
16645 Re: Heater Control valve Fred Talmadge Fri 7/19/2002
16644 Re: Heater Control valve Roger Sieling Fri 7/19/2002
16643 Re: Heater Control valve Crowther, Mike Fri 7/19/2002
16642 Re: Heater Control valve david_cusworth Fri 7/19/2002
16616 Heater Control valve Crowther, Mike Thu 7/18/2002

They mention 3/8" BSP (British Standard Pipe) as the thread size.
The valve is fitted into the head below the thermostat housing. There are two holes in this location. The forward hole is for the water temp' sensing bulb and the rear hole is for the heater valve.
It is interesting to note that heater valves, from various other applications, can be cannibalised to overhaul the lotus valve. This can be done insitu by drilling out the pop rivet that locks the valve body in place and replacing the diaphram. Or conversely there is always the correct valve for sale on the US Ebay site.
Regards Colin 68S4.

[elancoupe]

I dumped the d****d Triumph valve many years ago. I witnessed two different friends have nightmarish battles trying to extract the corroded remains of their heater valves from the cylinder head. I decide to not have that problem right then and there.

I fitted a 90 degree elbow in the head, and substituted an inline valve from an old Ford truck.

The existing cable hooked right up, and this valve has served for more than 20 years.