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Old 10-20-2021, 05:27 PM   #14
dmsfrr
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Join Date: Aug 2012
Location: Abq, NM
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Default Re: Checking radiator for overheating problem with 1956 Thunderbird

It seems quite normal to me. Especially since the old gauges can be inaccurate & tend to read high.
The handheld infrared temp gun will confirm the readings you're getting. 180* to 200* on the thermostat housing is normal. Photo 3
If it isn't spitting out coolant it isn't overheating. Coolant level should be an inch or so below the filler neck when cold, to allow for expansion.

When installing head gaskets one of them should look upside down compared to the other, it's the way they're made. The matching squared off corners of both gaskets should peek out from the upper front corner of the heads when they're installed correctly. Photo 1

A short metal tube should be soldered into the radiator filler neck, with a flexible tube on it, leading off to the bottom corner of the radiator (photo 2) or an overflow bottle.
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Attached Images
File Type: jpg head gasket corners, yellow circles.jpg (81.8 KB, 38 views)
File Type: jpg black and blue 55, radiator overflow.jpg (84.8 KB, 37 views)
File Type: jpg 57 engine, temp surface.jpg (80.3 KB, 32 views)

Last edited by dmsfrr; 10-21-2021 at 01:58 PM. Reason: add photo
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