----- 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