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Old 08-17-2016, 02:08 PM   #1
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over heat problem

coming back from Reno the temp. gauge jumped up to 250 and sat there for about 2 miles and as fast as it went up it went done to 190-200. I keep a close watch all the way home (150-175 miles) and it went all over the place. It just seams to me that it is the gauge sending unit. I was told that this is likely a WRV provided item. Cummins told me that the sending unit provided be them if bad would have some kind of alarm go off like check eng. light. The liquid, belt, and fan look OK and I had it serviced 25,000 miles ago so can any one help with this problem.
Thanks
Jim
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Old 08-17-2016, 03:00 PM   #2
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Jim,

Additional check-- the hydraulic reservoir fluid level. It drives the fan.

Do you have a ScanGauge D or Silverleaf? If so, you can get a "second opinion" on engine coolant temperature.

Agree, at 250 degrees F, you would have been through de-rate and into engine stop.
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Old 08-17-2016, 08:09 PM   #3
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Would be very helpful if you would list what year and model of Alpine you have. There were changes made over time and what would be true for our 2002 wouldn't be true for a 2006.

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Old 08-18-2016, 08:14 AM   #4
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I neglected to include 350 Cummins, yr 2000, 38 ft, 84,000 miles. Model, I'm sure of ???
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Jim
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Old 08-18-2016, 11:55 AM   #5
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Jim,
Sounds like the sending unit has failed or there is air in the system. I'm going to guess that you checked the coolant level?
I will add tha I had spike readings at one time. It looked like the coolant window was showing full but tapping on the tank told me it was empty. In my case it was a bad coolant cap that allowed pressure and steam to escape resulting in slow coolant loss.
Best of luck.
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Old 08-18-2016, 12:06 PM   #6
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Quote:
Originally Posted by greenbay View Post
I neglected to include 350 Cummins, yr 2000, 38 ft, 84,000 miles. Model, I'm sure of ???
Thanks
Jim
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When where your CAC, (Charge Air Cooler), and radiator last cleaned?
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Old 08-18-2016, 02:08 PM   #7
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I have a 2005, so I am not sure, however I believe in 2000 WRV used the infamous wax valve for the fan, we need someone with a 2000 to verify this.
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Old 08-19-2016, 05:32 AM   #8
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I have a 2005, so I am not sure, however I believe in 2000 WRV used the infamous wax valve for the fan, we need someone with a 2000 to verify this.
Infamous??
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Old 08-19-2016, 09:46 PM   #9
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over heat problem

2000 definitely uses the wax valve. Lots of posts in the Alpine forum discussing the wax valve.
If you were climbing the hill, I would ask what were you running for rpm's.


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