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Old 06-17-2019, 06:03 PM   #15
Join Date: Jan 2007
Posts: 30
Overheating on climbs - UPDATE SOLVED!

We have solved the problem with our motorhome overheating on climbs. I brought the motorhome to a friend of mine that was having the same problem with his unit, except a Cummins. Different engine, but same problem and same solution. THE RADIATOR. Mine has a side radiator and it APPEARED to be nice and clean. But after removing the shroud and further inspecting, it was very very very dirty. Dirt, leaves, twigs, rocks, you name it, was all in there in between the radiator, the inner cooler, the transmission cooler, the a/c condensor. All was very dirty. We spent most of the day blowing out the debris, then using a degreaser and hot water sprayer (not high pressure, hot water approx 60psi). Cleaned it, washed it out, then did this process over and over until all was clean. Just took it out on 300 mile heavy climb drive, towing, temp never got hot, max temp was 203. PROBLEM SOLVED.

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Old 06-17-2019, 06:53 PM   #16
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Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 18,504
Thanks for wrapping up you post.

Glad it was a simple, although messy, DIY , repair.

I'd say to put cleaning the rad on your annual to do list , Cummins says for rear rad motor home chassis 7,500 miles for the cleaning.

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 06-18-2019, 11:39 AM   #17
Join Date: Dec 2018
Posts: 64
I posted a few weeks back on your problems for overheating issues! This type of preventive maintenance should be done every two years. Along with checking radiator hoses and air to air hoses Installing bug screening will help your bug problem and pressure up air to air by checking for cracks! This is all basic preventive maintenance

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heat, heating

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