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Old 01-25-2015, 07:34 PM   #1
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Diplomat engine access

I'm looking at a 2005 Diplomat 40DST, there's a very small hatch in the rear bathroom, and what looks like limited access from the rear side panels.

My question is, do the panels beside the rear radiator remove easily for access to the engine? I viewed the MH in storage and couldn't open the rear grills for a better look.

Additionally, I was quite surprised at how rusted the top area of the engine is, specifically the cylinder head, exhaust manifold and turbo. There was a heat shield sitting loose on top of the exhaust brake actuator, is that normal ?

Any other comments on this model of coach would be welcome, I haven't purchased yet but may pull the trigger soon.

Todd
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Old 01-25-2015, 08:08 PM   #2
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I do not own a Diplomat but this is info based on info I've read.

The Diplomat is a rear radiator coach.

There are probably 2 hatches to access the engine in the Bedroom.

There is probably limited access from the 2 side panels, probably surge tank fill cap and fuel filters.

In general rear radiator coaches require annual cleaning of the radiators and transmission coolers which are part of the cooling assembly. Maintenance on the engine, due to limited access is harder. I read one post recently where it took a person a long time to change the fan belt.
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Old 01-25-2015, 09:55 PM   #3
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My daughter has an 05 Monaco with a C7 Cat and when you open the doors you have
1. Radiator and coolant tank
2. Oil dip stick and fill
Trans is checked from the bedroom, have to lift the floor.
Fuel filters and oil filter from under the coach
2 stroker
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Old 02-09-2015, 11:16 PM   #4
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I found my heat shield sitting loose as well. It had vibrated in half off the engine bracket. Took off bracket and and muffler shop weld back on. Click image for larger version

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Old 02-10-2015, 12:42 AM   #5
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Mine broke, I welded it, it broke again, so I reinforced it with doublers, gussets and weld. It looks like it is made of manhole covers. It was a PITA to install and remove to access the turbo. When I bumped it, it rang like a bell. The design of the heat shield mounted to the engine cylinder head is flawed. There is too much weight cantilevered off the two bolts and engine vibration it bound to cause it to fatigue like mine did. So I took it off the engine and made a new one of aluminum and screwed it to the fiberglass surround, above the turbo. It works great in that location.
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Old 02-12-2015, 07:09 AM   #6
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Mine doesn't have a heat shield.
Or is it the metal plate on the right in the photo?
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Old 02-12-2015, 10:21 AM   #7
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Our 2006 Diplomat is a DST floorplan, and there is another access point in the closet floor just ahead of the bathroom hatch that will allow access further forward on the engine. It is not easy to get out so don't plan on routinely removing it. The side panels in the rear don't provide much access to the engine. It's just a pain to work on, that's why I pay someone else to crawl around in there when needed.
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Old 02-12-2015, 10:29 AM   #8
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Quote:
Originally Posted by Willie300s View Post
Mine doesn't have a heat shield.
Or is it the metal plate on the right in the photo?
Yes Bill, the plate in the right hand side of your photo is the heat shield being reffered to.

Bob
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Old 02-12-2015, 12:34 PM   #9
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Thanks for the info all. As you can see by my signature, we decided against this motorhome.

If you do have this model yourself, I would check this heat shield, it was right against the exhaust brake controller on the one I looked at.

Owner didnt know or even understand why it was an issue. I walked away....
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Old 02-12-2015, 02:20 PM   #10
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Quote:
Originally Posted by nodine View Post
Yes Bill, the plate in the right hand side of your photo is the heat shield being reffered to.

Bob
Thanks Bob. After looking at my pictures I thought that may be the case.
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