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Let me see if I have this straight: When the flaps are closed, they divert the flow of cooling air to recirculate and get warm around the cylinder heads, which makes for a faster warmup to get the oil temp (and therefore pressure) correct, thus causing less engine wear from driving it when the pressure is too high. Once the temperature increases, the thermo pushes up the flaps and allows cool air to enter the engine compartment. The thing is if you're me, and you dont have the thermo (as I once didnt) you get a little impatient waiting for the engine to warm up to the proper temp and just want to DRIVE rather than start off gently and slowly until it does. This device assures that no cooling air will enter the compartment until the engine is hot enough, and of course, hot enough is still warmer than your average Califonia day upon starting the engine. Its a good thing to have. Not having it in CA is not as bad as not having it in NY during the winter, mind you. But still, you want it if you can find it, to assure that your engine is being properly treated. -- Mike Wodkowski 72 SQBK Brooklyn on 6/14/01 11:02 PM, David Britton at davidbritton2@home.com wrote: > Jim Adney Wrote: > >> One thing to ask is how they feel about the aircooled thermostat >> assembly. If they tell you that they always take it out, or disable it, > >> find another shop. > > What's the downside of removing or disabling the thermostat assy? > I know of 2 people that have their engines that way. They say it's no > big deal here in CA. > > DaveB > 64 notch > Summerland, CA > > ------------------------------------------------------------------- > List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org >