Is 205 Degrees Too Hot?
11-01-2009, 02:23 AM
#23
Safety Car
205 degrees for your water temp, at highway speed, is normal. They run hotter than the C5's. Even in colder weather I don't see temps lower than 199 degrees while on the highway. 
11-01-2009, 09:43 AM
#24
Race Director
11-01-2009, 09:47 AM
#25
Melting Slicks
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I normally run bewteen 195 and 205 in light cruising (freeway speeds with light throttle). It sometimes runs as high as 215-220 when in very heavy trraffic on warmer days when running at low speeds, but drops to around 200-205 once I am rolling again. Your temps sound absolutely normal. BTW, I have an '08 base 1LT with the A6.
11-01-2009, 11:06 AM
#26
Safety Car
205 is spot on for the coolant temperature at highway speeds. Whether it is 75 or 95 degrees ambient, that's the temperature I always see when driving from TX to LA or vice versa.
11-01-2009, 02:41 PM
#27
Tech Contributor
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If you want an under hood light GM Accessory Part Number 19165567 is available from Gene Culley for $32.20 + Shipping.
http://www.gmpartshouseusa.com/partl...subcat2=132697
Bill
http://www.gmpartshouseusa.com/partl...subcat2=132697
Bill
11-01-2009, 06:47 PM
#28
Team Owner
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St. Jude Donor '13
Hmmm...
Cruising at highway speeds in temps arouond 70'F, my coolant runs 196' like a rock.
Cruising at highway speeds in temps arouond 70'F, my coolant runs 196' like a rock.
11-01-2009, 08:00 PM
#29
8th Gear
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11-01-2009, 09:15 PM
#31
Race Director
Straight cruising when outside air temps are normal, I run at 192-194. Stop and go can go to 205 even higher. I have a '07, Z51/manual trans. If A/C is on, the fans will automatically stay on but shut down over 35mph (I think that's the speed), so temps can actually run cooler with A/C on because of that.
The under hood light was omitted in '07.
The under hood light was omitted in '07.
I changed my thermostat to a 160 and reprogrammed the fans I never get over about 200 even in heavy traffic with outside air temp about 100. 
11-01-2009, 09:55 PM
#33
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Driving thru N Arizona on my way to Page from North rim of Grand Canyon this summer it was 100 F outside at 10 PM at Marble Canyon, water temp was 199, which is 1 degree warmer than it normally is. Once it warms up to 198, only a traffic jam makes it go higher.
