overheating issue

[Unplanned Tourist]

Originally Posted by RobRoy

Also to the OP your cooling system will exchange heat better and faster with just straight water.

( yes I understand they many reasons to run the proper coolant )

Just saying this to be of temporary help in the case your running just a little bit too hot and need to get you back home.

HTH
Happy Trails

Also for temporary extra cooling, you can use "Water Wetter" It cools much better than even straight water.

[wolfe10]

Strongly recommend you ONLY use the proper coolant speced for your engine by Cummins-- not straight water or other non-recommended product.

[perryg362]

yep. that crap was caked on there. i got some friendly cleaner, sprayed the hell out of it let it sit then hosed ot off. i can actually see light through the radiator now; all of you are awesome and i can't say how much i appreciate all your help

[RobRoy]

Originally Posted by wolfe10

Strongly recommend you ONLY use the proper coolant speced for your engine by Cummins-- not straight water or other non-recommended product.

I knew this was coming.....that certainly didn't take long

You and I agree I to agree in using Cummins recommended coolant ( now Fleetguard ) as I have recommended here in other post's seen here at iRV2 like this one in post #9

https://www.irv2.com/forums/f115/rad...38-583246.html


and as to why I used the word " Temporary "

If you think running water in the coach cooling system as a temporary way to help lower his coolant temp ( and it will, not much but it will ) until he gets home is going to hurt his coach engine more than running it too hot untill he gets home or to a repair facility...stay with that.....then you're good to go and all set,


Here is what I will say. Is that in most cases when AVL North America https://www.avl.com/web/na/avl-north-america one of the the leading testing labs for Cummins and many others also do dyno testing on Cummins diesels in most cases the do not fill them antifreeze ......and in some cases they do some pretty lengthy testing. Sometimes for days on end at WOT testing for ring flutter issues or running at WOT for days testing for oil aeration issues with HUEI injection. A couple of good friends are engineers at AVL and confirmed that.


Have a nice day.

Happy Trails

[RobRoy]

Originally Posted by perryg362

yep. that crap was caked on there. i got some friendly cleaner, sprayed the hell out of it let it sit then hosed ot off. i can actually see light through the radiator now; all of you are awesome and i can't say how much i appreciate all your help

Perfect!



Hope this helps your situation


Happy Trails

[Unplanned Tourist]

Glad to hear that you have your rad and CAC cleaned out.

Using straight water or Water Wetter is a great temporary solution. Nobody suggested that you run it full time, but get your coolant checked when you get home.

[perryg362]

this issue was solved with the help of some great people and can be closed out. thank you all so much for helping me with what turns out to be an issue with a $15 fix

[ArtJoyce]

I would clean from both sides. CAC and Radiator dirt can get sandwiched between the two.

[Strohack]

I have a2003 HR Neptune with a similar setup. When I bought it I was checking it our and a service man hooked up the diagnostic port and told me that it had been recording overheated situations and he thought it was unwise to turn it up any. I bought a solvent sprayer and hosed down the radiators from both sides and then cleaned everything we could with a steam cleaner and then another round of solvent and a water flush and It runs like a deer. 85 MPH up hill into a headwind and no more overheat. I also extended the crankcase breather down below the bumper and aft to keep some of the oily fumes from going through the radiator and gumming things up. That big fan really sucks up everything.

It is hard to get to lots of that area! A lot easier to clean it a little often than a lot at once. Be very careful with high pressure water around the radiator fins. If you collapse them there in no way to fix that short of a new one.

[wolfe10]

Originally Posted by Strohack

85 MPH up hill into a headwind .........

???????????????

[Desert Man]

1997 Holiday Rambler Endeavor LE same problem. CAT engine and took it to a CAT engine repair facility. They read the codes and said this engine has been running hot on certain dates since new. They cleaned out the radiator and replaced the thermostat and said that is all they could do because the radiator has a bumper in front of it. Got it home and looked it over and the bumper has a deflector on it to compensate for this. I just went up a steep incline to the mountains and it heated up. Cool weather and not a long climb. When I got to the top the check engine light came on and as I ended the climb the check engine light went off and the engine cooled down. What to do for me too? Thanks

[GMN]

I have a 2006 Monaco Diplomat w/rear radiator from the outside back i had cleaned it a couple times and it looked good to the eye, however when crossing the Rockies. I experienced a very similar problem, after returning to Florida, I started taking a closer look at the problem. i found a rear hatch in the floor of the rear closet behind the sliding doors. after removing the doors, the engines hatch. and the floor cover behind the closet doors i could really see the inside radiator. the slobber tube that dumps the mist of oil base product had never been cleaned how i made it over the Rockies is a mystery. so, if you are only looking and cleaning from the outside you would never know that your problem even existed. after a thorough cleaning with some Extreme Simple green Aircraft and Precision Cleaner from the inside of the coach and replacing the thermostat which was the original and i also installed a slobber catch can my problem was solved, now the yearly Maintenace should be simple. I hope this helps you resolve your concerns on overheating a perfectly good engine. so if you look at the starter and see a lot of oily substance and it's all over your engine guard shield the inside of your radiator is probably even worst> hope this helps I'm sharing with you what our friends on IRV2 taught me

[wolfe10]

Originally Posted by Desert Man

1997 Holiday Rambler Endeavor LE same problem. CAT engine and took it to a CAT engine repair facility. They read the codes and said this engine has been running hot on certain dates since new. They cleaned out the radiator and replaced the thermostat and said that is all they could do because the radiator has a bumper in front of it.

OK, with that engine, verify that the small V belt that drives only the water pump is not slipping.


And, that SANDWICHED cooling package can NOT be cleaned adequately from the back. The CAC is in front of the radiator and the front of the CAC is where the dirt will be deposited. It needs to be cleaned from the front, with access from the bedroom or closet.


Easy to verify, particularly with a good flashlight after dark. Shine the light inside the fan shroud/around fan blades. The center will be clean (fan slings the dirt to the perimeter). Verify that the perimeter, particularly lower perimeter is clean.


Clean with a garden hose/nozzle and SIMPLE GREEN EXTREME. It is an aluminum-friendly degreaser.

[ArtJoyce]

I just cleaned my cac/radiator using 1:5 water simplegreen extreme. I also added a 12 inch hose to my slober tube. I think the slober was being sucked by the fan into the the cac.