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Re: long distance repair
Aleksander Mierzwa wrote:
> I've always been very satisfied with how quickly my 5KCST warms up. Even
> at freezing temperatures, the climate control system starts blowing warm
> air after couple of minutes.
> Both cars have functioning thermostats. Seems like Audi's cooling system
> is much better designed. I wonder what makes various cars reach
> operating temperature sooner or later. Is it possible that turbo has
> much effect on heating the coolant?
Audi uses a very well designed thermostat. It has 2 valves, works like
this: Cold engine-water only circulated in engine block, during warm-up
1st valve opens allowing water to flow to heater core and auto trans
cooler(warmer in the winter!) finally opening to radiator when at
operating temp. The main valve has a rapid opening vs. temp rate when
temp is close to operating point, as opposed to a cheaper thermostat
that starts the opening process early. The main valve also has a rubber
seal on its lip to prevent any water flow to radiator when the
thermostat is closed.
BTDT on other aftermarket thermostats, nothing comes close to the OEM