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01-31-2007, 05:06 PM
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Hummer Veteran
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Join Date: Sep 2006
Posts: 181
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cold!
Anyone notice if you jump in the H3 after its been sitting in the cold for a long time it goes slower than any other car you've ever driven? I've also noticed that sometimes if you floor it and truck downshifts in cold weather your temp will actually drop like a quarter. This was on the highway with the heat on in recirculate.
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01-31-2007, 05:32 PM
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Hummer Expert
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Join Date: Jan 2007
Location: Southern Cali
Posts: 652
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Re: cold!
You are letting the oil temp get up to par right? If its really cold you should let it warm up for several minutes before jumping on it. I also spend a lot of time cold weather (20 degrees and below), and I have never seen the temp gauge drop at all when Im driving. It changes slightly from time to time, but not suddenly. 
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01-31-2007, 05:40 PM
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Re: cold!
Yea, best not to thrash it until it's warmed up.
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02-01-2007, 03:33 AM
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Hummer Professional
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Join Date: Jun 2006
Location: louisiana
Posts: 326
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Re: cold!
Mine does that. I got on it the other night and the engine temp droped half way in less than a quarter mile. I think this is because the coolant moving through the engine faster at higher rpm. Also if you drop it down to third the temp will drop a little bit. I noticed this with my trailer. Look at my other thread.
http://www.elcovaforums.com/forums/s...t=coolant+temp
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02-01-2007, 08:10 AM
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Hummer Expert
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Join Date: Apr 2006
Location: cary nc
Posts: 765
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Re: cold!
yes it's normal for the temp gauge to drop when it's cold. Usually it will be at a level and when I hop on the interstate and get up to 70 or so it will drop some until I've gone a few miles. An yes, I let my engine warm up until it reaches it's idle rpm. It's just due to a rush of cold air around the sensor.
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02-01-2007, 02:26 PM
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Hummer Authority
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Join Date: May 2006
Location: Upstate NY
Posts: 1,050
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Re: cold!
Hmm, Hadn't noticed. It's been getting down to single digits in the past few weeks. Expect the same this weekend. 2 words - Block heater! 
I must say, I am pretty easy on the engine while it's cold.
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2009 Gray H3T, Aventure Pkg, 4 speed Auto, Brush Guard, Trailer Pkg., Elec Driver's Seat, 6CD audio, Slant back cap.
Gone: 2006 Red H3, Aventure Pkg, 5 Speed, Monsoon, Brush Guard, Rubber Foor mats, Trailer package, Chrome Fuel door, Engine Block Heater.
"You?re making the choices about whether you want to drive a little extra more or not drive extra more."
29-Jul-2008
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02-01-2007, 10:33 PM
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Hummer Expert
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Join Date: Jan 2007
Location: Southern Cali
Posts: 652
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Re: cold!
Quote:
Originally Posted by blindzebra
An yes, I let my engine warm up until it reaches it's idle rpm. It's just due to a rush of cold air around the sensor.
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I sure hope everyone lets their rig warm up, you never know though  I am confused by the cold air around the sensor statement. Engine temps should be read internally by the thermostat which reads water temp. Unless you mean the rush of cold air into the radiator, in which case doesn't seem like it would register colder temps immediately, although in the cases said here it seems as though it does.  This is more of a questioning statement looking for affirmation, not trying talk sh!t, blindzebra. 
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02-02-2007, 03:06 AM
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Hummer Veteran
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Join Date: Sep 2006
Posts: 181
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Re: cold!
Quote:
Originally Posted by raptorman53
Mine does that. I got on it the other night and the engine temp droped half way in less than a quarter mile. I think this is because the coolant moving through the engine faster at higher rpm. Also if you drop it down to third the temp will drop a little bit. I noticed this with my trailer. Look at my other thread.
http://www.elcovaforums.com/forums/s...t=coolant+temp
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Hey your definatley right. I put it in 3rd for maybe half a block and the temp dropped really fast. You'd think itd be opposite. Guess it just just pumps faster at higher rpms like you said. hmmm.
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02-02-2007, 04:36 AM
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Elcova Rookie
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Join Date: Jan 2007
Location: SE WI
Posts: 9
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Re: cold!
MY truck will do it when it's 50 out. I have never seen that in any other auto befor. The dealer said it was normal????????? The truck has no power when it's cold even after I let it warm up for 10 to 15 min, strange
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