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Old 09-27-2012, 08:53 AM   #29
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Originally Posted by Chillpoints View Post
So do you watch your temperature gauge? If so what is its range? Of course if you have a huge truck pulling a Bambi your data will not be as helpful as if you are like me pulling a trailer that is closer to the recommended limit of your TV. I am pulling a 29' Excella with a small 4.7 liter V8. Had I known I was going to get an Airstream I would have at least got the 5.7.

Thanks in advance for any thoughts.

Jon, I do watch the gauge, especially if I am dealing with hilly terrain. What I have found over time is that the pitch (sound) of the radiator fan will noticeably change when the temperature of the coolant starts to approach a high level. On a non electrically controlled engine fan, the sound of the fan approaches what I consider a roaring sound and with the efficiencies of the radiators and fans, it is surprising to watch the temp gauge drop. In my experience I've only seen the fan go into this situation when we get stuck into traffic jams in hot weather on Interstates where you are bumper to bumper and are also dealing with a grade. In those cases the radiators aren't really getting enough air flow and engine temps rise rapidly.


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'04 Classic 30' S.O.,'03 GMC Savana 2500,'14 Honda CTX 700
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Old 09-27-2012, 02:15 PM   #30
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Ill throw in a tid bit here thats not completely relevent to the situation:

I was sitting in a line waiting for the bank teller for about 5 minutes and in that time my engine temp rose about 1/4 of the gauge and my tranny temp rose about 40* (its actually got numbers on it). AND Iv got a tranny temp gauge. All just because I was idling! I figure its ok for your gauge to move around. Mine does constantly unless im on the highway and moving at a constant speed (never been over hills either). I imagine your gauge moving up just a hair is normal. More work = more heat. Unless it starts getting close to the red, I wouldnt worry about it

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Old 09-27-2012, 04:03 PM   #31
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I think that's relevant

Originally Posted by ElCamino Man View Post
Ill throw in a tid bit here thats not completely relevent to the situation:

I was sitting in a line waiting for the bank teller for about 5 minutes and in that time my engine temp rose ...
I watched my '84 Suburban's gauge like a hawk, and even installed a supplementary cooling fan controlled by me when we were idling because the gauge reading routinely went too high for my comfort.

The Suburban had to be left in the stable this year because its gas bill was killing us.

We're headed out to Disney soon with the Overlander under tow by my '99 Silverado 2500. The coolant gauge, from past experience, will not budge. The tranny temp gauge will show load, but no temperature that will concern me.

Nothing like a light-weight Vintage Airstream coupled to a "new" 3/4 truck for peace of mind during a 13 hour drive.

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Old 09-27-2012, 06:59 PM   #32
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Your like me Tom. If it is less than 20yrs old and has less than 200k miles on it then it is considered new. I think modern aluminum heads and reverse flow cooling has helped a lot with more efficient cooling in today’s vehicles. Reverse flow means the cool water from the radiator goes through the heads and then into the block.

ElCamino Man, Idling puts a ton of heat into the engine and transmission because you are sitting there with no airflow with the torque converter spinning generating heat. I use to warm up my 68 dodge van that way on cold mornings. I would put it in drive and let it idle to warm it up faster. I would also put it in neutral and rev the engine to cool it down a stop lights. The increased air flow from the fan spinning would cool it down.

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Old 09-28-2012, 07:37 AM   #33
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I thought about that after I posted it lol. Soon as I FINALLY got through to the teller and pulled onto the road, it almost immediately started dropping again lol.
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Old 09-28-2012, 11:52 AM   #34
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Thanks for all the advise and support

Well as usual the Forum is a great resource for information. I guess I know what I am going to be putting on my Christmas List this year. Lets just hope I can get $160 worth of "behaving" in between now and the end of the year so I can get one of those way cool Scangauge things. Then I can watch to see if I should add an additional Tans cooler.

If nothing else I appreciate all the votes that HP is not the ultimate requirement (Thanks MrUkToad). As I mentioned in the original post, I can tolerate the current gas millage I just don't want to go in the hole. Figuring I put over 14,000 miles on the truck this past year and only 1,400 were towing I need to be cautious.

Perhaps the easiest answer would be to do all my traveling in the winter when the air temps are much lower.

Jonathan Hettrick

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