3 replies to this topic

[ben.mini]

Hi,

Hope you are all keeping well. I am looking for some clarification. My Mini has had a 1275 engine fitted into her by a previous owner. I am not convinced the cooling water pipes are configured in the most optimal way.

Hose comes from no.4 piston end of head to inlet manifold, out of inlet manifold to heater valve, to heater, back from heater to bottom hose. There is no bypass from the head to the water pump, and no sandwhich plate.

Is this right? Is there a better way?

Would a different bottom hose allow connection to a sandwich plate for bypass when the thermostat is closed and return from the heater? But where should the inlet heating go to? Bottom hose? Heater?

Am I completely wrong? Any help much appreciated.

[nicklouse]

The. Only issue there is that when you turn off the heater you reduce the cooling to the far end of the engine.

 

if you fit a sandwich plate then you blank off the head take off.

[ben.mini]

Thanks Nicklouse, I ran her today buy had the heater valve open, seemed to run fine.

On the 1990 HIF44, from looking on mini spares exploded view, it seems they had a different bottom hose, and was plumbed, head to Inlet manifold, Inlet manifold to bottom hose. Sandwhich plate to heater, heater to valve, valve to bottom hose.

Just trying to work out why they did it that way.

[ben.mini]

So little update on this. The engine was never getting to running temperature, it was always running cold.

 

Because there was no bypass hose, the thermostat had been drilled by previous owner. Clearly the hole was too big. So I bought a bottom hose for a 1990 HIF44 Cooper, and a new thermostat housing, sandwich plate and thermostat. Plumbed it all up as per a 1990 but kept the internal heater valve open. She now warms up much quicker and actually gets to running temperature, so much better!