Installing Bob Shewmans thermostats

I know this sounds like it's becoming an advertisement for Skip and off topic but so far I am impressed with his coil rebuilding. In my opinion there is not another option for flathead coils.
 
dave collette said:
Hi, I have installed these thermosats In my in my 1946 and in my 1948, They both run great with them. I highly recommend them and have driven on plus 90 degee days.
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Dave, What temperatures did you witness before and after you'd installed these? What thermostats did you have in there prior to these?
 
quickchange34 said:
With any thermostat you install always drill a 1/8 inch hole in the middle of the outer ring. It allows a little water through and prevents air lock.
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glennsanders said:
Just asking,why are they not made with a hole
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The current stock replacement thermostats do have a vent hole with a "jiggle pin" in them to shut them off after the cooling system is filled and the engine is running.

Vent open for filling:

DSCN0618_zps7aac5a0e.jpg


Vent closed when water pumping:

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The Stant thermostats that I use and recommend have a notch in the valve plate that lets the air through when filling. It is visible in this photo of the Stant on the right. Left is the current stock replacement stat just showing the comparison of the openings in each for water to flow through - the Stant obviously bigger.

DSCN0704_zpsb3c84637.jpg
 
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Just purchased a set of Bob Shewman 180 degree thermostats for my rebuilt 39 81A engine. Presently engine is running too cool. Radiator has been cleaned and block given a good clean so hoping to raise run temps up around 175 to 180.
Pleased i found this post as i was wondering where to locate them. But see to locate at top of hose at inlet to radiator.
Thanks as always for good suppied info.
Phil NZ
 
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