----- Original Message -----
Sent: Sunday, January 27, 2008 8:56
AM
Subject: [FlyRotary] Re: Water Return in
Radiator
Wendell, while the heater return does return to the
radiator hose, it is not the hose connected to the output
side of the pump (thermostat housing) , but instead the heater return is
routed to the hose from the radiator to the inlet side
of the pump. At least it is in the both the 1986 and 1991 shop manuals I
have. This is a low pressure area whereas the hose from outlet of
waterpump (thermostat housing) to the radiator is in a higher pressure
area.
Ed
I stand corrected (sort of), just had
the radiator upside down when first looked at it. The angle of the
heater return connection is not 90 degrees and angles toward the radiator, and
would be against the flow going back to the engine and IMHO would restrict
coolant flow to the heater. This is presuming that
the heater flow is going from the outlet on the rear housing, to the
heater and then back to the engine. The additional cooling by passing the
heater coolant through the radiator would be minor and when the heater is
needed, it is cold and no extra engine cooling would be necessary. For
max heater flow, one would want the Y facing the engine.
Wendell