180 T-stat during winter? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-15-2006, 09:55 AM   #11
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Quote:
Originally Posted by dbtk2
Also, you don't want the engine to run cold all the time, from time to time you do want it to warm up over 212* to boil the water in the crankcase.
Normal driving for a few minutes after the engine has warmed up with a 180 thermostat will create enough heat to evaporate any small amount of water that might have condensed in the engine. The water vapor thus evaporated is circulated with crankase fumes through the PCV system and fed through the intake manifold to be burned off with the fuel mixture. The coolant temperature does not need to exceed the boiling point of water for this to happen.

I run a drilled 180F thermostat in my '95. It is used for a lot of short trips where the engine does not warm up before it is shut off. This does cause a small amount of water to condense in the engine, but just one normal warmup is sufficient to remove the water. This is supported by oil analysis. I recently had my oil analyzed after driving my car for about twenty minutes to make sure I got a warm sample of oil. The oil analyzed 0.0% water.
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Old 11-15-2006, 03:47 PM   #12
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Quote:
Originally Posted by bill buttermore
Finally, I don't know if 2000 models were still using Dex, but if so, I would drain, flush and re-fill with the newer "mixes with any color" coolant using the filling procedure described in Techinfo.
Yes... 2000 SLE has the Dex....
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Old 11-15-2006, 06:45 PM   #13
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As long as you stay with the size hole that Bill Buttermore listed, you'll do fine. Anything much larger will let too much coolant through when the theremostat is closed where it will throw a code.
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Old 11-15-2006, 07:38 PM   #14
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What cold Missouri winters are you talking about? Im not familiar with those

It was almost 80 one day last week, lets not forget that shall we?
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