2004 Fleetwood Flair 8.1 engine fan noise
I thought I'd post my strategy for taming the fan noise on my 2004 Fleetwood Flair. My coach has a 'hatch' in the middle of the engine doghouse. Removing it and looking inside made it clear the doghou...
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When I first got my MH a 454 TBI it ran hot and I added an extra layer if insulation to the doghouse and an 180 thermostat. The insulation really kept the heat and noise down and the 180 degree thermostat reduce the engine temps also but created other problems that took me a year to figure out with the help of some on this forum. What I noticed is that I started throwing engine codes every so often. Then noticed a pattern toward the fall. When I went back to a 195 thermostat the codes went away. 180 seemed fine for summer heat but not when temps dropped. What I evolved to was adding 2 #40 holes in the flange of the 195 stat to allow more cooling water to flow by. They also sell a HD stat with a poppet in the flange to allow extra water to flow by. With this mod and headers I don't hear my fan clutch come on at all except on long hills.
