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Re: 82 C` thermostat Posted by Saana88 [Email] ![]() ![]() ![]() In Reply to: 82 C` thermostat, mike88saab, Fri, 14 Sep 2007 09:08:04 Members do not see ads below this line. - Help Keep This Site Online - Signup |
The 82 degree thermostat kicks in the radiator sooner. The radiator is the primary cooling mechanism for your engine (second to convection through exhaust gases and other fluids).
The colder thermoswitch kicks in the fans sooner. The fans are the secondary cooling mechanism for your engine, when the radiator is (temporarily) overwhelmed.
The third-level cooling mechanism for your engine is your heater core. This is why when I replaced my thermostat with the 82 degree variety, I had a bit less heat in the cabin on really most sincerely cold days (single digits to teens or so with wind). This is why on my convertible (which I don't drive in the salt) I have both 82s in it (especially with the head-gasket-craving B212 motor). My winter '88 four door has the standard thermoswitch (89 degrees?) and therstomat (87 degrees?) and I seem to have heat just about all the time. With the 87/89 setup in the summer, sometimes I have to manually kick in the cooling fans, which I can do after removing the air conditioning and connecting two wires together in the engine bay.
The cooler items are a popular upgrade because they eliminate an engine temperature spike that may occur right after getting off the expressway or while stuck in traffic when the flow of air across the radiator suddenly ceases and the engine speed is at idle so the water pump isn't circulating as much coolant to boot.
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