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Driver side mirror mount [message #276837]

Mon, 27 April 2015 14:13

bpimm

Messages: 211
Registered: June 2013
Location: Washougal Washington

Karma: 2

Senior Member

While I have the driver side panel out I thought it would be a good time to repair the mount for the side mirror, all 4 bolts are stripped and won't stay tight. This is what I found inside.

http://www.gmcmhphotos.com/photos/data/6780/medium/20150427_114941.jpg

Is this what's supposed to be there, there is obvious signs of previous fiberglass work and the L bracket stiffener looks to be an afterthought.

Brian & RaeDean 1973 26' #383 Washougal WA

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Re: Driver side mirror mount [message #276839 is a reply to message #276837]

Mon, 27 April 2015 14:40

midlf

Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)

Karma: 1

Senior Member

Here are some under dash pictures I took for another project. Several of the photos show the drivers mirror mount plate.

http://www.gmcmhphotos.com/photos/g6278-blue-wire.html

note the lower left rivnut on the reinforcing plate needed some JB Weld to keep it from spinning. I also used antisieze when remouting the mirror to prevent the screw from freezing to the rivnut. (The wires in the center of the plate are for the Ramco mirrors.)

Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI

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Re: Driver side mirror mount [message #276840 is a reply to message #276839]

Mon, 27 April 2015 14:48

bpimm

Messages: 211
Registered: June 2013
Location: Washougal Washington

Karma: 2

Senior Member

Thanks, that shows me what I need, the plate is supposed to be tight to the FRP not spaced out 1/2" with goo in between.

Brian & RaeDean 1973 26' #383 Washougal WA

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Re: Driver side mirror mount [message #277146 is a reply to message #276840]

Sat, 02 May 2015 17:14

bpimm

Messages: 211
Registered: June 2013
Location: Washougal Washington

Karma: 2

Senior Member

After getting deeper into this repair I now know what happened, the mirror was torn off of the motor home and repaired sorta.

The aluminum frame rail that the L bracket mounts to is bent in from the hit the mirror took and instead of fixing it who ever repaired it just folded up a bunch of fiberglass cloth and stuffed it between the l bracket and the body. It looks like they saturated it with resin and shoved it in from the inside let it cure then ground it smooth and covered it with body filler. after grinding down the inside and seeing what looked like a raw edge of FRP I ground down the outside.

Here is the space between the body and the L bracket it was up to 3/4" thick on the top right looking from the inside.

http://www.gmcmhphotos.com/photos/data/6780/20150427_114941.jpg

Here is what I found when I ground down the outside, you can see all the air pockets around the perimeter where the patch was installed.

http://www.gmcmhphotos.com/photos/data/6783/medium/20150502_090451.jpg

I cut the whole section out so I could start over and do it right. (at least my definition of right).

http://www.gmcmhphotos.com/photos/data/6783/medium/20150502_100528.jpg

I made a sheet metal form to start the repair from the inside and laid up 4 layers of glass using West systems Epoxy resin. there is a layer of clear packaging tape on the back side of the sheet metal for a mold release.

http://www.gmcmhphotos.com/photos/data/6783/medium/20150502_101945.jpg

http://www.gmcmhphotos.com/photos/data/6783/medium/20150502_101954.jpg

http://www.gmcmhphotos.com/photos/data/6783/medium/20150502_102645.jpg

As I sit waiting for the epoxy to cure, I came up with a question that I can't find a picture to answer, Do the rivnuts go through the frp and aluminum bracket or just through the bracket?

Brian & RaeDean 1973 26' #383 Washougal WA

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Re: Driver side mirror mount [message #277151 is a reply to message #277146]

Sat, 02 May 2015 21:24

Dennis S

Messages: 3046
Registered: November 2005

Karma: 2

Senior Member

This old thread doesn't answer your question -- but it does have Rob's info on the riv nuts.

http://gmc.mybirdfeeder.net/GMCforum/index.php?t=msg&goto=120192&rid=904&srch=Mirror+mount#msg_120192

Dennis S
73 Painted Desert 230
Memphis TN Metro

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Re: Driver side mirror mount [message #277165 is a reply to message #277146]

Sun, 03 May 2015 10:59

midlf

Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)

Karma: 1

Senior Member

I don't recall the rvnuts showing on the outside. There is a slight gap between the metal plate and the interior FRP. Therefore I believe the rvnut is only through the plate

Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI

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Re: Driver side mirror mount [message #277767 is a reply to message #277146]

Wed, 13 May 2015 11:07

bpimm

Messages: 211
Registered: June 2013
Location: Washougal Washington

Karma: 2

Senior Member

I pulled the tarp back far enough to get to the passenger side mirror and it looks like the rivnuts go through the frp and the aluminum mount so that's the way I will do the driver side.

http://i101.photobucket.com/albums/m57/bdpimm/1973%20GMC%20Motor%20home/20150503_113741.jpg

After I pulled the sheet metal form I filled around the edges of the patch that I didn't get from the inside using narrow strips of cloth and epoxy then sanded those down (I forgot to get pics of this part) and then added a full patch size layer of cloth and epoxy to finish the outside glass work.
Here it is waiting for the epoxy to cure, I have a heap lamp helping to overcome the cold temps.

http://i101.photobucket.com/albums/m57/bdpimm/1973%20GMC%20Motor%20home/20150503_112107.jpg

This was followed by a full coat of Dura Glass which is a glass strand impregnated body filler which was followed by regular body filler and contoured.
Here it is ready for primer.

http://i101.photobucket.com/albums/m57/bdpimm/1973%20GMC%20Motor%20home/20150510_101235.jpg

For primer I tried something I hadn't used before, I usually use a 2 part 2K primer but doing small repairs it's a real pain to mix up a small amount and get enough but not to much as you have to throw away any excess. My paint guy suggested a rattle can product he started carrying and I'm quite impressed, it is a high build sandable primer and it worked almost as good as the 2K's I have previously used. Plenty good enough for spot repairs. The primer is U-pol#5 high build primer http://www.u-pol.co.uk/product-cat/116/aerosols.htm

I didn't get a picture of it in the sandable primer but here it is with a good coat of epoxy primer. the tint in the primer didn't come out real close but it's better than white, grey or black until the paint job happens.

http://i101.photobucket.com/albums/m57/bdpimm/1973%20GMC%20Motor%20home/20150510_154531.jpg

I tried to remove the stripes but they are cracked into tiny bits and even with a heat gun it would have taken forever so I'll deal with that at paint time.

so next is to reinstall the aluminum bracket and drill the holes from the inside to mount the mirror.

Brian & RaeDean 1973 26' #383 Washougal WA

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Re: Driver side mirror mount [message #277772 is a reply to message #277767]

Wed, 13 May 2015 11:51

tphipps

Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL

Karma: 9

Senior Member

Very nice job.
Tom, MS II

2012 Phoenix Cruiser model 2552 KA4CSG

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Re: Driver side mirror mount [message #282001 is a reply to message #277767]

Mon, 13 July 2015 11:41

bpimm

Messages: 211
Registered: June 2013
Location: Washougal Washington

Karma: 2

Senior Member

My riv nut tool only goes up to 1/4" so I had to build a setter for the 5/16" riv nuts.

Facing off the end of the tubing.

http://www.gmcmhphotos.com/photos/data/6783/medium/20150513_1427421.jpg

I Ground flats for a wrench.

http://www.gmcmhphotos.com/photos/data/6783/medium/20150513_1559541.jpg

Using a grade 8 bolt with 2 grade 8 washers and a nylon washer for a bearing, loaded and ready to test.

http://www.gmcmhphotos.com/photos/data/6783/medium/20150514_0841501.jpg

Test complete

http://www.gmcmhphotos.com/photos/data/6783/medium/20150514_0848511.jpg

http://www.gmcmhphotos.com/photos/data/6783/medium/20150514_0849071.jpg

I put some sealer on the riv nuts before installing them, worked great.

http://www.gmcmhphotos.com/photos/data/6783/medium/20150514_0932051.jpg

Brian & RaeDean 1973 26' #383 Washougal WA

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Re: [GMCnet] Driver side mirror mount [message #282025 is a reply to message #282001]

Mon, 13 July 2015 16:57

jimk

Messages: 6734
Registered: July 2006
Location: Belmont, CA

Karma: 9

Senior Member

If you do not make the mounting secure, you'll not be able to see much once
on the highway as it will vibrate and blure the vision.
The plate is Tig Welded to the back support beam.
The skin itself will not tantalize the mirror from wind waves. .

On Mon, Jul 13, 2015 at 9:41 AM, Brian Pimm wrote:

> My riv nut tool only goes up to 1/4" so I had to build a setter for the
> 5/16" riv nuts.
>
> Facing off the end of the tubing.
> http://www.gmcmhphotos.com/photos/data/6783/medium/20150513_1427421.jpg
>
> I Ground flats for a wrench.
> http://www.gmcmhphotos.com/photos/data/6783/medium/20150513_1559541.jpg
>
> Using a grade 8 bolt with 2 grade 8 washers and a nylon washer for a
> bearing, loaded and ready to test.
> http://www.gmcmhphotos.com/photos/data/6783/medium/20150514_0841501.jpg
>
> Test complete
> http://www.gmcmhphotos.com/photos/data/6783/medium/20150514_0848511.jpg
> http://www.gmcmhphotos.com/photos/data/6783/medium/20150514_0849071.jpg
>
> I put some sealer on the riv nuts before installing them, worked great.
> http://www.gmcmhphotos.com/photos/data/6783/medium/20150514_0932051.jpg
>
> --
> Brian & RaeDean
>
> 1973 26' #383
>
> Washougal WA
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>

--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502

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Re: [GMCnet] Driver side mirror mount [message #282027 is a reply to message #282025]

Mon, 13 July 2015 17:14

bpimm

Messages: 211
Registered: June 2013
Location: Washougal Washington

Karma: 2

Senior Member

It's bolted to the framework not welded, maybe that's from the original incident. but there weren't any signs of welding on it or the frame just the bolt holes.

Brian & RaeDean 1973 26' #383 Washougal WA

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