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JayChicago · 02-09-2026, 08:01 PM

Ken
Your thermostat only helps with quick warm-up and determines the minimum operating temp. When the engine starts to run warm, both 160 and 180 stats will be wide open just the same. IMHO, 180 is better for a clean running engine.

02-09-2026, 08:01 PM	#12
JayChicago Senior Member Join Date: Jan 2019 Location: Chicago Posts: 1,028	Re: 37 thermostat question Ken Your thermostat only helps with quick warm-up and determines the minimum operating temp. When the engine starts to run warm, both 160 and 180 stats will be wide open just the same. IMHO, 180 is better for a clean running engine.