HELP! We have a 2005 Fleetwood Expedition RV w/C7 engine. We are in Arizona, climbing 5,6,7,000 ft high mountains. Our

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Customer: HELP! We have a 2005 Fleetwood Expedition RV w/C7 engine. We are in Arizona, climbing 5,6,7,000 ft high mountains. Our RV keeps getting hot when we climb these mountains and there seems to be a loss of power when it gets hot going up these hills. When we pull off and sit in almost seconds the temperature gauge goes back to normal. We have overflow bottle because it had a crack in it. The antifreeze and water levels were good. Yesterday, we had it at Camping World. They said that we needed a new air filter and fuel filters. They replaced those and almost $800 later, we were off hoping that our problem was solved. They felt that the radiator did not need to be flushed and that the temperature regulator was good. So, we are at wits end trying to keep from blowing up the engine as to what else needs to be done. Thank you.
Answered by yellowman99 in 5 mins 11 years ago
Auto Mechanic

16,260 satisfied customers

Specialities include: Auto Body Technician, Heavy Equipment Repairs, Diesel Engine Repairs, Brake and Transmission Repairs

Hi. Thanks for using JA! I will try and help you out.

Your engine is overheating at high loads and altitudes. From my experience the most common thing that causes this is a partly clogged radiator. If you had a thermostat or water pump problem the engine would overheat all the time. I would consider having the radiator cleaned.

Please let me know if you need more help or have more questions.
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