It's a 5/8 NPT and you should use this hole for you temp gauge. Plug the one
in the radiator.
Larry Miller
-----Original Message-----
From: Elliott, Patrick <patrick.elliott@attws.com>
To: 'spridgets@Autox.Team.Net' <spridgets@Autox.Team.Net>;
'dingram@tnet.net' <dingram@tnet.net>
Date: Wednesday, April 08, 1998 3:37 PM
Subject: RE: Plug for hole in cylinder head?
>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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