You have a hole in your head?
That head is from a 1275, which you correctly determined was for the
temperature probe. Do your self a favor and move your probe to the head
and plug the hole in the radiator. Why? because as explained to me when
I asked this very same question about two weeks ago, The hole in the
head is :
A.) Quicker to respond to changes in engine temp.
B.) If your thermostat fails to open, Your Radiator stays nice and cool
while your engine does a three mile island thing.
C.) By watching the gauge closely you could see the temperature drop
when the thermostat does open, there by knowing the temp range of the
thermostat if would be important to you..
I believe that this should be a standard 1/2" NPT plug.
>----------
>From: dingram@tnet.net[SMTP:dingram@tnet.net]
>Reply To: dingram@tnet.net
>Sent: Wednesday, April 08, 1998 2:36 PM
>To: spridgets@Autox.Team.Net
>Subject: Plug for hole in cylinder head?
>
>My 58 Bugeye has a 948 engine, at least the block clearly shows "950" on the
>left side front as it should.
>
>There is a threaded hole in the cylinder head, right above the engine number
>plate on the front right side. Look like 5/8", can't tell if it is fine
>thread or not.
>
>Coolant fluid pours out of there, and the only reference I can find in parts
>books, manuals, etc. is in Haynes as the spot for the water temperature
>sensor for a 1275 engine. The sensor on my car is on the radiator, top right
>side, same as in pictures in Horler. I can't find anything so far in the
>factory parts manual, Vic Brit, or Moss.
>
>Is it possible that a 1275 cylinder head has been fitted to my 948 block?
>
>Can I just plug this hole with an appropriate size bolt?
>
>If so, can anyone advise what the size of the bolt would be?
>
>TIA,
>
>Doug Ingram
>58 Bugeye
>AN5L/636
>
>
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