Community Forums

geraldviator · 07-06-2013, 03:35 PM

I purchased a new Avanti by Damon (now Thor) a couple of years ago. The front end diesel engine is so noisy that my wife and I cannot carry on a conversation much less listen to the radio or a book on tape. The fans cut on about every 3 to five minutes in hot weather. They stay on for a long as a couple of minutes. I realize that the fans are necessary to cool the engine, but was wondering if anyone knows any way to make the engine run cooler so that the fans won't be coming on constantly. I have thought of adding additional fans. It is a Cummings ISM 6.7-200HP. Would appreciate any input.

sfischer · 07-06-2013, 03:48 PM

I think you mean a Cummins 6.7 ISB engine.

Have you ever had the radiator fins cleaned (both front and rear sides)? That might keep your fan from coming on as often.

geraldviator · 07-06-2013, 03:53 PM

Right. It is a 6.7. This has been happening since the day I bought it. I only have 18,000 miles. Do you think it would need to be cleaned so soon.

sfischer · 07-06-2013, 04:32 PM

That is hard to say. It has more to do with the driving conditions than miles.

Ray,IN · 07-06-2013, 06:19 PM

Someone makes a coolant that is supposed to function more efficiently than others, don't know the name, or if it is approved by Cummins.
If if were me, I'd focus on installing better sound-deadening insulation beneath the floor and dog-house engine cover.

Ernie Ekberg · 07-06-2013, 06:22 PM

sounds like it needs some insulation in dog house. jc whiteny has it

Mekanic · 07-06-2013, 08:48 PM

If you were to get he engine to run at a cooler temp it would get less MPG and have more wear.
Why not work on making the front of the vehicle quieter??
THere are quite a few products out there.
look at this site The Official Dynamat Website for ideas.