Laser Heat Gun - Pontiac GTO Forum
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post #1 of 3 (permalink) Old 09-24-2019, 02:43 PM Thread Starter
 
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Laser Heat Gun

I have one of these and am wondering where you point it to have the most accurate idea of internal coolant temperature.
Do you point it at the thermostat housing or where? I get different readings and they are all cooler than what the factory gauge shows.
I don't trust the factory gauge.
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post #2 of 3 (permalink) Old 09-24-2019, 05:22 PM
 
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I have always pointed it at the thermostat housing on all my cars. I have noticed that on our '66 GTO the thermostat housing typically reads around 3 degrees hotter that when I point it to where the temp sending unit screws into the intake manifold.
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post #3 of 3 (permalink) Old 10-01-2019, 01:05 PM
 
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I check the thermostat housing, upper and lower radiator hoses and the heads. The heat differential between the radiator hoses will give you and idea of how the radiator is working.
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO General Discussion

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