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TxC vs GM Taking it right to the source!

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  #1  
Old 01-14-2007, 07:31 AM
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The wind resistance down the SIDE of a long 5er is another thing people miss. If you have a wind blowing toward you at an angle, the force of that wind is applied to the side of the trailer and results in a rearward force that the truck will have to overcome. Since we are talking about a massive area, it can be quite a force. I didn't have as much of that with the uhaul, but I likely made up for it in raw dirty frontal area.

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Old 01-16-2007, 09:35 AM
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Ya, there is no alarms going off or coolant pukeing everywhere, so it doesn't overheat. I don't even waste my breath on the OH threads anymore, at the other place.
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It only took 5 minutes.....
RIP Grizz. It was a fun hour and a half
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Old 01-16-2007, 09:44 AM
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Quote:
Originally Posted by Rttoys
Ya, there is no alarms going off or coolant pukeing everywhere, so it doesn't overheat. I don't even waste my breath on the OH threads anymore, at the other place.
I can see why. I mean come on, normal operating temp is 192* so we are talking about a 48* increase in temps. That is a huge temp increase! If his engine rode at 144* which is 48* UNDER normal you think he would take it in to the dealer??????



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Old 01-16-2007, 10:32 AM
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Default Fan operation

I have extensively measured fan engagement points on many trucks and have found that the fan generally engages around 208* - 210* but I have also found that it can engage as late as 227* if it is having a hard day or if is attempting to engage while at high RPM, as in being held above 2700 RPM

Here is the reason that 240* is well beyond overheating:

EVERY time the fan engages, there is ALWAYS an initial drop in ECT.

ALWAYS, EVERY TIME, WITHOUT FAIL, IT IS JUST A FACT.

So, to get to 240*, you will have already had the fan engage, the ECT drop, then AGAINST THE FAN AND THE REST OF THE COOLING SYSTEM, you then climb up to 240*

In other words, your heat output was more than your cooling capability. No other way around it, and as long as you applied the heat the temp would continue to rise. It did to get to 240*, how do you think it got there?

There is no magic guys, its all just numbers, and I don't understand why so many can't get it.

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Old 01-16-2007, 10:41 AM
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Quote:
Originally Posted by Rttoys
Ya, there is no alarms going off or coolant pukeing everywhere, so it doesn't overheat.
I think Rttoys has answered that question. I agree with not even looking at the OH threads. There are WAY TOO MANY EXPERTS discussing this topic over there.
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It only took 5 minutes.....

Also, RIP Grizz, it was a fun hour and a half.
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Old 01-16-2007, 11:53 AM
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Quote:
Originally Posted by RoadRunnerTR21
I think Rttoys has answered that question. I agree with not even looking at the OH threads. There are WAY TOO MANY EXPERTS discussing this topic over there.
Isn't it amazing how so many BIG TRUCK drivers just know what they are talking about without any real knowledge as how the cooling system on these beasts really work or understand BTU input/output. Been around long enough to know the first time my truck's temp gague went to 220* and then just kept on rising this AINT GOOD and something got to give.
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  #7  
Old 01-16-2007, 12:31 PM
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Read this one:

I voted "not an overheater" as some others have. My 2005 LLY (2500HD 4WD) frequently is used to pull my 10,000 lb. 32ft. GN race trailer. There have been several instances when pulling in hills (Iowa, eastern OH) in high (90+) ambient temperature when the fan would run at max. noise all the time and the ECT gauge would take off to the right. In response I would slow down, become an impediment to traffic in the slow lane, and wait for the temperature gauge to stabilize. Technically not overheat episodes, but ample reason to conclude that the truck has inadequate heat rejection capacity under load


Sounds like overheating to me.
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'05 CCSB D/A LLY- V2 w/fan, Fan Damn Max, 45 gal Transfer Flow replacement tank, multiple gun racks, B&W turn over gooseneck hitch, Curt class 4 receiver hitch, cranked T-bars, 2" GM rear spacers, Rancho RSX9000, BFG All-Terrain T/A 285/70-17 on Hummer H2 wheels, Added 2nd generator, 2 sets of train horns, plus a bunch of other stuff.

'94 Yamaha V-Max, '99 Ducati 996s, '07 Yamaha FZ1

'05 Desert Fox 28ks toy hauler- 12' 9" tall 102" wide Total Combined Weight 21,700#


It only took 5 minutes.....
RIP Grizz. It was a fun hour and a half
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  #8  
Old 01-16-2007, 03:17 PM
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I have a good time reading all the OH threads on the DP now that TxC has done all the testing and proving about the LLY. After two years of this thing it’s like a bunch of newbie’s are jumping on board and re hashing it over and over and over again. Makes me chuckle. What I will be waiting to see next is how long those so called non-over heaters last compared to my temp efficient LLY in the long haul. HEAT KILLS. Cheers
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Old 01-16-2007, 10:26 PM
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I'm about done with the other site. It is clear as day and the evidence has been there for a long time. I'm tired of arguing with fools. It cracks me up that people still believe in the stock gauge and find temps of 235+ acceptable!!!

I just read post#140 over at DP about the guy in South Dakota. UNBELIEVABLE!!!!!!!!! FOOLS!!!!!!!!!!!!!!!!!

Last edited by turbobruce : 01-16-2007 at 11:24 PM.
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  #10  
Old 01-17-2007, 06:43 AM
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Quote:
Originally Posted by turbobruce
I'm about done with the other site. It is clear as day and the evidence has been there for a long time. I'm tired of arguing with fools. It cracks me up that people still believe in the stock gauge and find temps of 235+ acceptable!!!

I just read post#140 over at DP about the guy in South Dakota. UNBELIEVABLE!!!!!!!!! FOOLS!!!!!!!!!!!!!!!!!
Whats sad is it is because of guys like him that GM has gotten away with this. He has the mentality that it is HIM that is causing his truck to get hot, not any design flaw. Judging by the responses there are a lot like him too. When they won't hold GM accountable, then GM figures its OK to screw the rest, since owners can't even agree there is a problem.

So "thanks" all you guys that let GM slide on this, because as long as you are around they will always feel free to do stuff like this.

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