Heater issue

[Jezza_hr]

(09-30-2014 10:09 PM)jondee86 Wrote:  With the water circuit shown, the flow is essentially governed by the
resistance of the heater core versus the resistance of the radiator core.
If the resistance to flow of the heater core is greater than the resistance
of the radiator, then the water will take the path of least resistance.

AFAIK most heater pipework setups use the pressure differential created
by the water pump to ensure flow through the heater core. So I think that
you will have to tap the heater return line into the high suction zone close
to the back side of the water pump.

Cheers... jondee86

Your point about the path of least resistance is something that did cross my mind, unfortunately the water relocation kit I have doesn't allow me to set things up any other way, so I'm at a loss to figure out a way round this. Unless I can fit a T-junction right behind the water pump, which would be a tight squeeze.