This winter I will finally replace the mechanical fan in my TR6 with an
electrical one. My plan is to have the new fan come on when either a manual
switch is turned on or when the temperature of the coolant reaches some well
defined point and a thermo-electric switch closes.
The manual switch is simple enough to set up. The thermo-electric one
requires a fitting to be added to the radiator into which the switch will be
installed (I refuse to add the "external" temp switches some of the speed
shop fan "kits" come with). So a couple of questions arise from this plan:
1. I would like the thermo switch to be reasonably easy to replace. Since my
other car is a VW GTI and I am familiar with these cars, I have a spare
thermo switch from a junked GTI. It uses a male M22x1.5 thread (that's
metric). Is the fitting for this switch easy to install on a TR6 radiator? I
assume what happens is the radiator shop will drill a hole in my rad and
braze on a threaded female fitting to fit the switch I specify, correct? Or
is there more science to it than that? Is M22x1.5 a completely obscure
thread for these switches? It seems to be much fatter then the Smiths temp
sender to the electric temp gauge for example.
2. While the rad is out (it is recently cleaned, boiled, etc. so no need for
that just yet), I would also like to add a drain tap (like the early TR6
rads had). Are there better drain taps than others? If so what kind are
good? And what kind are bad and should be avoided? I assume the procedure is
the same, the drain tap has a male threaded fitting which requires a hole to
be drilled in the rad and a threaded female fitting of the right size brazed
on the rad, correct?
Any info or past experiences greatly appreciated.
--- Peter Zaborski CF58310UO ---
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