Removing the Heater

[jimj67]

I'd like to remove the factory (under the dash) heater from my 1967 MM 1000.
I don't use the heater in Arizona and it takes up a lot of room under the dash, above the parcel shelf.
I plan on adding a instrument gauge cluster (oil pressure, water temp and tachometer) under the dash
where the heater controls and box are currently located.
I see the two brackets on the back (firewall) side and the two screws mounting the heater to the underside of the dash panel.
Here's my question: If I disconnect the heater inlet hot water hose from the control valve on the cylinder head should I close the water circulation loop by reconnecting the outlet hose that is connected to the black metal pipe that comes from the radiator hose. I understand that closing the control value will stop the water flow into the heater. But what should I do with the hose that is connected to the metal pipe that comes from the radiator hose once I remove the heater?
Could you please reply and thanks very much!

[simmitc]

Closing the valve will reduce the flow, but is unlikely to seal completely. It is possible to remove the valve, fit a blanking plate, and replace the radiator bottom hose with one that does not have the return pipe fitted. However, there is a strong argument that blanking off the heater will lead to hot spots in the head. I recommend that you do join a short loop of hose from the heater tap to the return pipe. You will also need to blank off the air intake - remove the large diameter hose and fit a plate over the hole in the bulkhead (firewall).

[jimj67]

Thanks for the information on my question and your quick reply!

[bmcecosse]

As above, make a loop - but you may want to retain the fresh air inlet! I would... Instruments down there will be hard to see - they should be easily in your field of vision as you drive - without taking your eyes off the road......