[Jim M] Diesel Pusher Owners: Be aware that if you travel dirt roads your radiator is in back and inline with a lot of dust that gets kicked up by all four wheels. Further, there is a big fan back there that sucks up all that dust and pushes it right into your radiator. This has been known to build up to the point of causing heating problems and is insidious because you can't see the build up except from under the coach looking up! Fix is easy, just back flow water through the radiator cooling fins when you wash the machine, effectively dislodging the dirt. I have had a couple of friends who have had this problem and only wish to pass the caution on!