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Re: Overheating

To: lupienj@wal.hp.com, megatest!bldg2fs1!sfisher@uu2.psi.com
Subject: Re: Overheating
From: Teriann J. Wakeman <twakeman@apple.com>
Date: Fri, 17 Sep 93 14:53:35 -0700
Scott,
About your radiator flow theory.  Say per you argument that the coolent is in
there half as much time.  You argument seems correct if you have in infinite
amount of coolent flowing through once.  But the reality is you only have a 
small amount of coolent.  If it does not loose as much temperature in the
radiator as it will gain on its next trip through the block, it will have
a higher temperature next time it reaches the radiator.  This is a closed
environment (until the temp gets too high).  What you are trying for is an
equiliberum where the amount of heat put into the coolent by the engine
equals the amount given off in the radiator at a sutible temperature for the
engine's well being.  Your coolent has got to stay in the radiator long
enough to lose the heat imparted while it was in the engine.

But you are right that th TR2-4A & same engined morgans have a radiator bipass.
This allows the pump to pump water through the engine until the coolent
reaches the temperature to open the thermostat.  When the thermostat opens,
a sleeve attached to the movable part covers the bypass routing all the
water through the radiator andcutting off the bipass.  If there was no 
thermostat

Most of the coolent would continue down the low resistance bypass.

The land Rover's cooling system also works this way. I have not yet checked to
see if a Land Rover thermostat (easy to get) fits into a TR2-4A housing as
a substitute to the TR thermostat (hard to get).

If you have a TR2-4A, Morgan +4, or Land Rover that has a thermostat that 
does not have a collor, you got the wrong one and mostlikely a real
cooling problem (lack of cooling that is).

TeriAnn

meanwhile Scott & I will probably get poo pooed by a PHD thermodynamices type
on the mail list..


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