Home » Public Forums » GMCnet » Front Roof Cap Assembly repair
| Front Roof Cap Assembly repair [message #293795] |
Wed, 13 January 2016 17:03  |
Who_dun_it
Messages: 176
Registered: April 2007
Location: Thousand Oaks, CA
Karma: 1
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Senior Member |
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I need to make repairs to the front roof and would like input from folks that have done this. The torpedo style running lights were fastened to the roof by drilling a 1/2" hole in the roof and using wing-type drywall anchors. I am thinking about patching all the holes (10 at least) and using another fastening method. All input regarding process and type of repair material is appreciated. Also, tips for new fasteners would be nice.
Thanks
Les
T.O. CA
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| Re: [GMCnet] Front Roof Cap Assembly repair [message #293803 is a reply to message #293801] |
Wed, 13 January 2016 17:51  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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I buy them at Esleys truck accessories and chrome shop. Interstate 5 at the
Brooks, Oregon off ramp. They have a Web site. I will look for a link.
Jim Hupy
On Jan 13, 2016 3:46 PM, "Les Leach" wrote:
> What is the source for the one piece lights?
>
>
>
> [quote title=James Hupy wrote on Wed, 13 January 2016 15:13]Use 3/8" well
> nuts and 3M 5200 sealer. I replace the original clearance
> lights with molded one piece LED lights the same shape as the original. I
> use stainless steel machine screws. Once done, no leaks, drips, no more
> burned out bulbs to mess with.
> Jim Hupy
> Salem, Or.
> 78 GMC ROYALE 403
> On Jan 13, 2016 3:04 PM, "Les Leach" wrote:
>
>
>
> _______________________________________________
> GMCnet mailing list
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| Re: [GMCnet] Front Roof Cap Assembly repair [message #293843 is a reply to message #293797] |
Thu, 14 January 2016 15:00 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Jim,
IIRC LED lights use 6/32 screws to attach them to the roof.
I searched McMaster Carr for "well nuts" and discovered the following:
Part number: 93495A120
Product Detail: Rubber-Insulated Brass Rivet Nut
Thread: 6-32
Material Thickness: 1/64"-5/32"
Hole Size: 5/16"
Flange OD: 0.452"
Flange HT: 0.062"
Overall Length: 0.499"
Les has noted that the holes in his roof are 1/2" and to fill those he'd need to use rubber well nuts that had 1/4 x 20 threads.
Regards,
Rob M.
The Pedantic Mechanic
-----Original Message-----
From: James Hupy
Use 3/8" well nuts and 3M 5200 sealer. I replace the original clearance
lights with molded one piece LED lights the same shape as the original. I
use stainless steel machine screws. Once done, no leaks, drips, no more
burned out bulbs to mess with.
Jim
On Jan 13, 2016 3:04 PM, "Les Leach" wrote:
> I need to make repairs to the front roof and would like input from folks
> that have done this. The torpedo style running lights were fastened to the
> roof by drilling a 1/2" hole in the roof and using wing-type drywall
> anchors. I am thinking about patching all the holes (10 at least) and using
> another fastening method. All input regarding process and type of repair
> material is appreciated. Also, tips for new fasteners would be nice.
>
> Thanks
>
> Les
> T.O. CA
>
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Front Roof Cap Assembly repair [message #293845 is a reply to message #293843] |
Thu, 14 January 2016 15:14 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Rob, I have a local Ace Hardware store that has an O.M.G. selection of
fasteners in pull out drawers. All in bulk. They have 3/8" well nuts. All
the holes in the roof caps that I have encountered in GMC coaches were
smaller than that. They were fitted with aluminum molly expansion anchors.
I just take a pair of dyke side cutters and cut the molly anchors, then
pull them up through the ragged hole. I have not encountered 1/2" holes or
anchors. That would pose a problem with the well nuts. There has to be a
work around for this. I'll think on it some.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Jan 14, 2016 1:03 PM, "Robert Mueller" wrote:
> Jim,
>
> IIRC LED lights use 6/32 screws to attach them to the roof.
>
> I searched McMaster Carr for "well nuts" and discovered the following:
>
> Part number: 93495A120
> Product Detail: Rubber-Insulated Brass Rivet Nut
> Thread: 6-32
> Material Thickness: 1/64"-5/32"
> Hole Size: 5/16"
> Flange OD: 0.452"
> Flange HT: 0.062"
> Overall Length: 0.499"
>
> Les has noted that the holes in his roof are 1/2" and to fill those he'd
> need to use rubber well nuts that had 1/4 x 20 threads.
>
> Regards,
> Rob M.
> The Pedantic Mechanic
>
> -----Original Message-----
> From: James Hupy
>
> Use 3/8" well nuts and 3M 5200 sealer. I replace the original clearance
> lights with molded one piece LED lights the same shape as the original. I
> use stainless steel machine screws. Once done, no leaks, drips, no more
> burned out bulbs to mess with.
> Jim
>
> On Jan 13, 2016 3:04 PM, "Les Leach" wrote:
>
>> I need to make repairs to the front roof and would like input from folks
>> that have done this. The torpedo style running lights were fastened to
> the
>> roof by drilling a 1/2" hole in the roof and using wing-type drywall
>> anchors. I am thinking about patching all the holes (10 at least) and
> using
>> another fastening method. All input regarding process and type of repair
>> material is appreciated. Also, tips for new fasteners would be nice.
>>
>> Thanks
>>
>> Les
>> T.O. CA
>>
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] Front Roof Cap Assembly repair [message #293847 is a reply to message #293845] |
Thu, 14 January 2016 16:38 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Jim,
I've drilled out the OEM rivet nuts and pushed them through into the inside. It is a bit difficult if they spin but you can hold the
OD of the flange with a pair of pliers.
Replacing the OEM aluminum rivet nuts with 6/32 well nuts is the way to go, however, as Les noted the holes in his roof are 1/2" OD
and they ain't gonna cut it!
We need to come up with an easy way to sleeve the 1/2 hole down to the 5/16" OD of the 6/32 well nuts.
OK everybody put your thinking caps on!
Regards,
Rob M.
The Pedantic Mechanic
-----Original Message-----
From: James Hupy
Rob, I have a local Ace Hardware store that has an O.M.G. selection of
fasteners in pull out drawers. All in bulk. They have 3/8" well nuts. All
the holes in the roof caps that I have encountered in GMC coaches were
smaller than that. They were fitted with aluminum molly expansion anchors.
I just take a pair of dyke side cutters and cut the molly anchors, then
pull them up through the ragged hole. I have not encountered 1/2" holes or
anchors. That would pose a problem with the well nuts. There has to be a
work around for this. I'll think on it some.
Jim Hupy
On Jan 14, 2016 1:03 PM, "Robert Mueller" wrote:
> Jim,
>
> IIRC LED lights use 6/32 screws to attach them to the roof.
>
> I searched McMaster Carr for "well nuts" and discovered the following:
>
> Part number: 93495A120
> Product Detail: Rubber-Insulated Brass Rivet Nut
> Thread: 6-32
> Material Thickness: 1/64"-5/32"
> Hole Size: 5/16"
> Flange OD: 0.452"
> Flange HT: 0.062"
> Overall Length: 0.499"
>
> Les has noted that the holes in his roof are 1/2" and to fill those he'd
> need to use rubber well nuts that had 1/4 x 20 threads.
>
> Regards,
> Rob M.
> The Pedantic Mechanic
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Unsubscribe or Change List Options:
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Front Roof Cap Assembly repair [message #293892 is a reply to message #293796] |
Fri, 15 January 2016 13:26 |
TnS.GMC
Messages: 18
Registered: November 2015
Karma: 0
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Junior Member |
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Try these:
Maxxima M20311Y Amber LED Triangle Combination Marker Light for Bus/Cab
http://www.amazon.com/Maxxima-M20311Y-Triangle-Combination-Marker/dp/B00L521CCW/ref=sr_1_1?s=automotive&ie=UTF8&qid=1452885859&sr=1-1& keywords=Maxxima+M20311Y+Amber+LED+Triangle+Combination+Marker+Light+for+Bus%2FCab
Come in Amber and Red, about $11 ea. I have some on the way to try.
--
Todd and Susan
'76 23' Birchaven
Alleged Mystery Machine
Melbourne, FL
--------- Original Message --------
From: gmclist@list.gmcnet.org
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Front Roof Cap Assembly repair
Date: 13/01/16 23:53
> I buy them at Esleys truck accessories and chrome shop. Interstate 5 at
the
> Brooks, Oregon off ramp. They have a Web site. I will look for a link.
> Jim Hupy
> On Jan 13, 2016 3:46 PM, "Les Leach"
<les.leach@verizon.net> wrote:
>
> > What is the source for the one piece lights?
> >
> >
> >
> > [quote title=James Hupy wrote on Wed, 13 January 2016 15:13]Use
3/8" well
> > nuts and 3M 5200 sealer. I replace the original clearance
> > lights with molded one piece LED lights the same shape as the
original. I
> > use stainless steel machine screws. Once done, no leaks, drips, no
more
> > burned out bulbs to mess with.
> > Jim Hupy
> > Salem, Or.
> > 78 GMC ROYALE 403
> > On Jan 13, 2016 3:04 PM, "Les Leach" wrote:
> >
> >
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
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| Re: [GMCnet] Front Roof Cap Assembly repair [message #293895 is a reply to message #293892] |
Fri, 15 January 2016 13:37 |
Guy Lopes
Messages: 499
Registered: April 2004
Location: Sacramento, CA
Karma: 3
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Senior Member |
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I bought a couple like that off of Amazon (don't remember the seller) to
try, and discovered that they only had the positive lead exposed. They
depended on one mounting screw (into a metal roof) to use as ground. Rather
than cobble together a fix, I just ordered these from one of our venders.
Two leads and completely sealed.
http://appliedgmc.com/prod.itml/icOid/911
Guy Lopes
76 Birchaven "Orion"
Sacramento, CA
W6TOL monitoring 146.52
Zello app Channel GMC MH
www.GMC-Guy.com
Try these:
Maxxima M20311Y Amber LED Triangle Combination Marker Light for Bus/Cab
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Guy Lopes
76 Birchaven "Orion"
Sacramento, CA
W6TOL
www.GMC-Guy.com
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