By off, it’s reading 240 while the laser therm says the intake is 200, upper radiator hose 190, etc.
Probably dumb questions:
1. How can I tell if my laser thermometer is correct?
2. I don’t know if my gauge is electric or mechanical. (I thought it was electric, now I’m not so sure.). How can I tell?
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 1965 Pontiac LeMans. M21, 3.73 in a 12 bolt, Kauffman 461.
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