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jtaylor0521's avatar
jtaylor0521
Explorer
Jul 30, 2013

Diesel engine running hot at 58 mph in the mountains

I have a 2005 Monaco Cayman 37' with a 300 hp cummings engine. Yesterday was the first time we have encountered mountains. I was running in 5th gear at 58 mph up and down the hills on I40. I notice...
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MrWizard's avatar
MrWizard
Moderator
Jul 31, 2013
clean the radiator
climb those hills in 4th gear at 53mph 2200 rpm is a good spot, don't lug and don't run max out, try 50mph whats the rush

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