Richard
You have made a number of assumptions about your cooling system.
1 Is you temp gauge accurate?
2 Are you really getting more air flow through the radiator at speed?
At first glance your problem sounds like your cooling system is
borderline cooling and needs some attention. I suggest you read the Tech
Tip article on cooling on the TE/AE web site, and then start evaluating all
the components in your system. http://www.teae.org/tech_tips/index.html
At speed you should be getting more air through the radiator but not
always. The fan spins and draws air but as the fan spins faster it can
become an air block and reduce air flow; it depends on the shape of the
blades and its position in the fan shroud. The fan also needs to be at
least an inch away from the radiator to work correctly. If the water pump
was replace; the fan hub needs to be pressed to the correct position for the
Tiger, the stock Mustang location is wrong.
Hope this helps
Ron Fraser
-----Original Message-----
From: owner-tigers@autox.team.net [mailto:owner-tigers@autox.team.net] On
Behalf Of Richard
Sent: Monday, May 09, 2005 12:58 AM
To: Tiger List
Subject: heat at speed
Ok guys ....here's another engine temp question.
I have 67 MKII....all stock. If you are driving in town in stop and go
traffic and the temp gauge stays at around 200. Why when driven on the open
road at 65 mph and 3000 rpm does the temp rise to over 212? Then when back
in slower in town driving with the engine at around 2000 rpm the temp starts
to drop back to around 200.
I have always assumed that faster is better for cooling. Why wouldn't the
increase in air flow thru the radiator at the higher speed compensate for
the increase in engine temp and keep the temp at around 200. Would this
indicate that the water pump is not pushing enough water thru the system to
cool the engine?
Thanks
Richard
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