Diesel pusher motorhomes are wonderful vehicles, with the engine in the rear, the ride up front is very quiet and enjoyable, you actually can hear yourself think, or in my case, my stomach growl when I'm hungry. Along with the engine in the rear, the radiator is back there, too. A large fan on the engine pushes air backwards towards the rear of the motorhome and through the radiator to keep the coolant, well, cool.
When the radiator is well maintained, everything stays cool as a cucumber. But if certain maintenance is not done regularly, the rear engine/radiator combination can be a real Achilles Heel. Overheating can occur and if not watched carefully, serious engine damage can happen.
What happens is as the fan blows air through the radiator, dust, dirt, leaves and other debris can be picked up and lodged between the radiator cooling fins, clogging them and reducing the airflow. The funny thing is you can't see the clogs looking in at the radiator from the outside.
You have to periodically clean the radiator from the other side (at least annually), and that is from inside the engine compartment. Only a few, easily purchased items are required to do the cleaning, some Simple Green cleaner, a garden sprayer and a water hose, as well as whatever tools you need to open the engine hatch from the inside.
On our Journey, the one item I loathe (actually I dislike it strongly) is removing the top step in our rear bedroom. It is a fight every time, poorly engineered. First there are some screws that have to be removed along the edge of the step. In the picture, the screwdrivers are pointing to where the screws are located along the edge.
After removing the screws, I use a large screwdriver to pry up the step.
The step has to be worked up out of place.
Finally the step can be slid out of the way, exposing the engine hatch.
Four bolts hold down the insulated metal hatch cover. Remove the bolts and the engine and engine side of the radiator are exposed. Sorry for the lousy quality of the next couple of pictures, the lighting was a little hard to control, plus I had warmed up the engine, so there was some steam when I sprayed the Simple Green and the water on the radiator.
Spraying the Simple Green all over the radiator, then let it sit for about 10 minutes. Give it a really good soaking, making sure to get the cleaner all over the radiator, even the outside edges because that is where lots of dust is thrown by the fan.
Then finally a good rinsing with fresh water.
Another simple to do, but important maintenance item to keep the Journey running cool.
Now for the fun part, getting that &*#$)%@! step back into place. :c)
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