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Old 04-05-2019, 02:22 PM   #1
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2001 Mountain Aire rear bumper

So a little mistake leaves me a big mess to clean up ...

I clipped the rear bumper of my 2001 gas Mountain Aire on a low rock leaving a driveway and busted it up pretty good on the left side.

I looked under and it seems it is held in place by a bunch of sheet metal screws at the edges and along the top of it.

Are there any other places this thing is held on?

I will remove the wiring first and then want to unscrew it to repair the fiberglass and repaint it ...

I have done tons of fiberglass repair to a mid 70s sailboat I used to own, and this is all non structural so feel pretty good about doing it ... just want to get it off as easily as possible.


Mark White
2001 Newmar Mountain Aire
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Old 04-05-2019, 04:51 PM   #2
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Post a pic of what you have.
I took a quick Google and couldn't find a pic of the rear of a Gas, but the front shows a fiberglass bumper so I assume the rear is too.

If so, why do you need to remove it to fix it? It might be easier to fix in place.

Step 1 is to power wash the backside to get rid of grease / oil. Use detergent that will break down any oil.

Step 2 is to figure out a plan on how to put the pieces together

Step 3 is generally to cut the fiberglass at the cracks so you can pull the panel back into alignment.

Step 4 make some jigs to get the panel straight again.

Step 5 cut some fiberglass out in the general shapes that are needed

Step 6 put some activated resin on the back of the bumper, apply the dry glass, use a roller and stiff chip brush to immerse the glass into the resin.

Step 7 Apply two or three layers of glass on the backside.

Step 8 Wait for all to dry. Once hard, remove your jigs and double check the general alignment

Step 9 Use an angle grinder with a flap disc and cut a bevel at all cracks.

Step 10 clean and glass the outside cracks.

Step 11 Wait till dry and flap disc the glass to general smooth.

Step 12 Body plastic to cosmetically finish

Step 13 Resecure all attachment points

Step 14 paint

2000 Bounder 36S w/ Ford F53 V10
2002 Newmar Mountain Aire Limited 4370 w/ Spartan K2 and Cummins 500hp
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Old 04-05-2019, 08:13 PM   #3
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Yes ... pretty much my plan. I was hoping to get it in my garage to keep more control of temps and moisture during this early spring. I also need to remake some of the attachment spots as the screws got ripped through the fiberglass ...
Mark White
2001 Newmar Mountain Aire
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Old 04-19-2019, 01:28 PM   #4
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Making progress on the cargo bay door that was busted up too. Just got the new bottom aluminum channel in place with JB Weld ... Next up is reattaching the aluminum skin and smoothing it out with some beautiful Bondo. Click image for larger version

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