75C was the original stat, which I believe is 160F..
Many prefer to run the engines at higher temps. My MGB is happy with a 190
stat, year round.
It is thought that the 160 stat was warm enough for adequate engine
operation, and low enough to keep alcohol antifreeze evaporation at acceptable
amounts. As ethylene glycol antifreeze became the norm, stat temps increased.
In 25F weather, or colder, the 75C stat may never open. The gauge is likely
to indicate 60 or so. In cold weather, I cover the bottom part of the radiator
slats with a canvas, adjusting to to raise the gauge to 75.
Bob
---------- Original Message ----------
From: Duvall Video Productions <MIKE@DUVALLVIDEO.COM>
To: mg-t@autox.team.net
Subject: [Mg-t] 165 vs 180 thermostat
Date: Wed, 5 Jun 2013 18:07:52 -0500
The original style thermostat stuck closed in my TD. I discovered a 52 mm
thermostat fits between the original housing and the curved pipe going into
the engine. I found a NAPA THM 185 fits well and opens at 180 degrees (82
celcius).
It seems to operate well- the gauge sits on the low end until the thermostat
opens and then shoots up- eventually it reaches temp and stays there. It
has
a jiggle pin to let a little coolant and air through and I blocked off the
bypass.
I have since found a 160 degree as well ( Triton TT6-160 and Dayton DT15C.
)
that might fit.
Anyone know the original thermostat temp and what does everyone run? Can
you
tell the difference between a 160 and 180 from a running or comfort
standpoint?
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