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Old 02-28-2011, 12:01 PM   #52
ddavis
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Drives: Blown Ls3
Join Date: May 2010
Location: Bay Area SF
Posts: 1,030
The thermostat controls when your coolant is flowing into the engine. It blocks the coolant from the engine until it reaches a certain temperature, then it opens up to let coolant in. This lets your engine warm up faster and keeps your engine running at the temperature you want. Same as a house thermostat. I run a 160deg in mine. Alot of guys debate rather to run a colder one or not. Ive always ran them in my cars with no problems and my tuner recommended it so i put one in. Theres a few debate threads about them on the forum
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