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coolant temp. down when drive at high speed..

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Old 02-16-2007, 06:55 PM
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Default coolant temp. down when drive at high speed..

is that normal? the coolant temp will be down

to the the first highlight on the gauge.

I had VW passat.the coolant temp is constant

when i drive at 120 mph though.So could it be

the thermostat stick open? but this early

morning I tried to open the cap for coolant

reservoir.there's no ventilation for the coolant

system.So is that means the thermostat still

working nicely?
Old 02-16-2007, 07:22 PM
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Default what's the temp there

my car will do that if it's below 32F or so. If it's over 50F and doing it, you got a problem.
Old 02-16-2007, 08:26 PM
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Default yesterday it was 40-43 C degree....

<img src="http://www.yesalbum.com/v001/popdemonic/gauge/dsc00546.jpg">

During the day,the coolant temp should be the second highlight(operating temp).

At night when the temp down to 26-30 C degree.
when i put the car on the hgihway with 140km/h+
then the coolant temp will down to the first
highlight on the gauge.

Is that normal?

<img src="http://www.yesalbum.com/v001/popdemonic/gauge/dsc00547.jpg">
Old 02-16-2007, 08:30 PM
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Default thermostat

can you check your display on the CC unit, channel 51? if it reads normal than your t-stat is bad.

it's easy and cheap Pop
Old 02-16-2007, 08:33 PM
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Default What is CC unit?

sorry,i don't get that.
Old 02-16-2007, 10:07 PM
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Default pop, I'm kind of having the same problem.....

55F weather city driving at night for about 1 hour
coolant temp left the first 3 lines just a little and it stays there doesn't move much.
When I stop and let it idle for about two minutes
the temp will rise almost touching the first thin line.
At freeway it would go down and stay at the third line.
too low?? or just about right?

#CC chan.51 around 62-65 without heater on
#CC chan.51 around 73-76 with heater on
#heater works fine
#recent coolant flush
#new thermostat (lower temp)

possible the new thermostat stuck open??
if that is the case what cause it to fail since its new?
if not what else could it be??anyone??
Old 02-16-2007, 10:22 PM
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Default that's really closed to me...

I think it should be the problem.
In the past,i remember that after
cold start for a while the gauge
would be pointed to around the first
thin line all the times.Even i put the car
on the highway with 200km/h.it would stay
there.I've also searched from SJM's Website.
I've got 2 causes 1.Thermostat 2.MFTS(Multi function temp. switch) any others?
Old 02-16-2007, 10:35 PM
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Default Re: What is CC unit?

<ul><li><a href="https://www.audiworld.com/tech/int6.shtml">Unlocking CC (Climate Control) Panel</a></li></ul>
Old 02-17-2007, 12:13 AM
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Default follow link, it should read around 86 degrees celcius

heat must be on to do this
Old 02-17-2007, 07:14 AM
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Default i've got 50 value constantly on c51.

so what's wrong with it?

Fast4esT,my car also getting smoke out again on idle.
may be the bad seal.i need to bring my k24 to the turbo shop again. i spent $12500 on maintenance last year.i might sell my car soon.


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