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15/60 Heater Matrix

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15/60 Heater Matrix

January 15, 2015
7:16 pm

Chris Arnold

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January 4, 2013

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I.m just at the point with the rebuild of my 15/60 where I want to replace the leaking Smiths heater valve. To keep the car running a while ago I plumbed the outlet from the head round to the pipe that runs across the manifolds to the bottom hose. I’m sure (and the hoses agree) that the outlet from the head was connected to the valve and the other pipe went to the bottom hose but this means that the heater radiator is plumbed up in reverse to the car radiator. As both radiators basically do the same job am I correct in taking the hot water from the head to the LOWER (valve) connection and the cooler water from the heater radiator to the bottom hose from the UPPER connection. It seems the wrong way round but I’m sure that is the way it should be. Can anyone through some light on this apparent paradox?
Chris

January 15, 2015
8:01 pm

Graham Button

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January 3, 2013

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Hi Chris,
Yes you are correct, the outlet from the head goes to the valve, the heater matrix is mounted on it’s side in the heater case so although the flow would be aided by the thermo syphon action if they were reversed the function of heater matrix is to heat the interior rather than reduce the temperature of the engine coolant so restricting the flow in this way will allow more heat into the car. That’s my theory anyway, anyone else got any ideas.
Graham.

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