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Wayne, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 9658
Experience:  worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling
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I do not have a dodge. But I do have a Cummins 9 isl 400 HP

Customer Question

I do not have a dodge. But I do have a Cummins 9 isl 400 HP in a motorhome. It over heats when it has to work hard. If I keep it to 55mph it is not to bad. I do not know if the fan is going to high speed. I don't think the thermostat is bad. What you think.
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Wayne replied 1 year ago.

Hi I'm Wayne

I will help you with this

What you are describing is your clutch fan has failed

and not kicking in when it needs to

if it is air operated then then the sensor needs to be replaced

I hope this helped you

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Expert:  Wayne replied 1 year ago.


Just a follow up with you

did my answer help you

let me know, Please