[Healeys] Thermostats

[BJ8 Healeys]

"If this controller restriction did not exist the coolant would flow
rapidly to rad causing your car o over heat. the radiator requires time o
cool
your coolant."

Marty, I think what you intended to say was if the thermostat was not there
then the coolant would flow too rapidly through the radiator to be cooled
and the car would overheat (correct me if I'm misinterpreting your
statement).  Then why does the BMC parts manual for the BJ7 and BJ8 (page
MA8) identify a blanking sleeve only in lieu of a thermostat as an option
for cars going to extremely hot climates?

I respectfully have to disagree with you.  It has been a long time since I
took Thermodynamics 301 and 302 in college, but as I recall the cooling
ability of a closed system depends on the coolant flow rate, the cooling air
flow rate, and the difference in temperature between the coolant and the
ambient air.  The greater the flow rate of either coolant or air, the higher
the heat transfer rate and the better the cooling.


Steve Byers
HBJ8L/36666	
BJ8 Registry
Havelock, NC  USA

-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
On Behalf Of Martin Jansen
Sent: Wednesday, August 25, 2010 8:35 PM
To: healeys at autox.team.net
Subject: Re: [Healeys] Thermostats

A thermostat is to assist in warm up as well as to control coolant flow to
the
rad If this controller restriction did not exist the coolant would flow
rapidly to rad causing your car o over heat. the radiator requires time o
cool
your coolant.
the thermostat controls the coolant flow.
If a car is overheating check the exhaust for any restrictions and check the
cam shaft if worn this can lead to overheating. Another area to check is the
pitch of the fan blade, this can cause overheating if too shallow not
allowing
enough volume of air to be pulled through the rad.
Re stricter plates are used in race cars travelling at high speeds.

Happy Healeying,   Marty  www.jule-enterprises.com