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Old 02-14-2015, 07:40 PM   #1
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Temp Gauge

traded gasser in for 2008 damon Tuscany 4072 this week. The temp gauge fluxuates while driving at 70 down interstate. Is this something that indicates a problem ?
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Old 02-14-2015, 09:47 PM   #2
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temp gauge

traded Gulf stream for 2008 Tuscany 4072 this weekend and noticed temp gauge going from half way to 3/4 and then back as we were driving down interstate. I this normal or is there a thermostat issue or fan clutch problem
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Old 02-14-2015, 10:06 PM   #3
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That is more fluctuation than I would be comfortable with. Could be thermostat, sending unit or cooling fan or even coolant level.
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Old 02-14-2015, 10:56 PM   #4
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Depends on how much it fluctuates. I dont know that much about your coach. I do know that freightliner chassis Diesels with the side radiator do not turn on the fan until the temp is at a temp somewhere around 212 degrees or something like that. When the fan comes on it cools the engine down and shuts the fan off. Mine goes back and forth like that. Freightliner tells me that is normal.
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Old 02-15-2015, 11:30 PM   #5
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NADA indicates that your 2008 Tuscany 4072 is on a Freightliner chassis. Have your VIN number handy (last 6 digits) and call the Freightliner help desk (1 800 385-4357). Ask the technician if your temp guage movement is normal. They are very helpful, and it is a free service.

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Old 02-16-2015, 03:34 PM   #6
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Hi markmiiler,
My Cummins stays +/- 5 degrees on flat Interstate travel. The temp climbs only when going uphill.
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Old 05-10-2015, 09:11 AM   #7
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Late to the party, but mine does the same thing. Appears normal enough.
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Old 05-10-2015, 09:17 AM   #8
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Perhaps a electrical issue not a temp issue. Start with a ground check. Sounds like a bad ground to me.
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Old 05-10-2015, 11:29 AM   #9
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Fluctuations indicate bad thermostat or air in the system, possibly bad gasket. Start by testing the thermostat, doing a pressure test and burping the system.
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Old 05-11-2015, 05:31 AM   #10
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Quote:
Originally Posted by t55watson View Post
Perhaps a electrical issue not a temp issue. Start with a ground check. Sounds like a bad ground to me.
Quote:
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Fluctuations indicate bad thermostat or air in the system, possibly bad gasket. Start by testing the thermostat, doing a pressure test and burping the system.
At least in my case I can say No to both.. I think Gemini said it correctly above as per Freightliner. If I am cruising at 65 and below its pretty rock solid, if I start to push it and run 70+ per the speedo (which is 4~5 MPH slow) it will start to climb, then the fan will kick on, cool it off, then turn off..

Beyond that, the faster the speed the shorter the cycle.
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Old 05-11-2015, 06:16 AM   #11
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Boostable is right! Typically side radiator mounted fans are hydraulic and only kick in when certain temps are reached and cool it down. Depending on driving habits or terrain, this will occur more frquently or less!
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Old 05-14-2015, 06:17 PM   #12
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I/m with red apple slow down... Don't want a tire to blow... My try cleaning radiator
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