PO bondoed the door mirror holes, can I tap and thread them? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ubtripn · 03-16-2011, 09:02 AM

or should I look for a different style of mirror with a different attachment place. (He also just painted the truck so I don't want to really patch it or do any metal work.)

67swb72klb · 03-16-2011, 09:12 AM

shure can just drill close to size not too big tap out should go easy bondo taps easy compaired to metal

ubtripn · 03-16-2011, 09:27 AM

That I can be sure it does do. But do you think it will hold? =)

lofly'a · 03-16-2011, 09:42 AM

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"for best results", that term is important sometimes, use the factory mounting method. i assume that your truck is the 67/68 in your avatar so the the factory mirror components will look like the pics below. the backing plate is the threaded mounting point and goes inside the door. drilling and tapping the door metal IMO is not the way to go (not thick enough), especially if filler is in this area. so from inside to outside you will have the backing plate-door-gasket-mirror, this is the sandwich called a mirror assembly that is all held together with 3 screws. most of our vendors have these pieces from $40 to $50 each. even if you use another type of mirror, use or fabricate a backing plate, or you'll be tightening or reinstalling mirrors often

ubtripn · 03-16-2011, 10:19 AM

Perfect!!!!!!!!!!!!!!!!!!!!!!!1 Thank you!

68chevyLQ4 · 03-17-2011, 05:20 PM

Who sells the backing plates?? I have the same issue with my truck.. Want to put the stock round mirrors back on

lofly'a · 03-17-2011, 06:15 PM

i found them here:
http://www.gmcpaulstruckparts.com/Exterior.htm
or you can make your own as i did with a piece of 1/4" flat bar drilled and tapped.

**WIDESIDE72** · 03-17-2011, 11:16 PM

I always wondered if the backing plates were being repro'ed. Now I know!

tubbedII · 03-18-2011, 12:39 PM

Quote:

Originally Posted by WIDESIDE72

I always wondered if the backing plates were being repro'ed. Now I know!

I couldn't find the backing plate when I was looking...I just used some nuts on the inside...not the best option, but it works for now since mine is just in primer.

**Daddy Brim** · 03-18-2011, 09:29 PM

I got mine, mirrors and backing plates from classicparts.com very easy to install.

ubtripn · 03-18-2011, 11:12 PM

Thanks everyone. I will do it the right way the first time.

03-16-2011, 09:02 AM	#1
ubtripn Registered User Join Date: Apr 2010 Location: Boise, ID Posts: 1,280	PO bondoed the door mirror holes, can I tap and thread them? or should I look for a different style of mirror with a different attachment place. (He also just painted the truck so I don't want to really patch it or do any metal work.)

03-16-2011, 09:12 AM	#2
67swb72klb Registered User Join Date: Dec 2010 Location: livingston co.mi Posts: 2,452	Re: PO bondoed the door mirror holes, can I tap and thread them? shure can just drill close to size not too big tap out should go easy bondo taps easy compaired to metal __________________ California 65 GTO---Texas 64 burb 283 ---Oklahoma 67 CST SWB BBW wood bed 327 2004r---New Mexico 72 k10 350 350 auto---Georga 72 short step project

03-16-2011, 09:27 AM	#3
ubtripn Registered User Join Date: Apr 2010 Location: Boise, ID Posts: 1,280	Re: PO bondoed the door mirror holes, can I tap and thread them? That I can be sure it does do. But do you think it will hold? =)

03-16-2011, 09:42 AM	#4
lofly'a Registered User Join Date: May 2000 Location: Alexandria, LA 71301 Posts: 1,451	Re: PO bondoed the door mirror holes, can I tap and thread them? "for best results", that term is important sometimes, use the factory mounting method. i assume that your truck is the 67/68 in your avatar so the the factory mirror components will look like the pics below. the backing plate is the threaded mounting point and goes inside the door. drilling and tapping the door metal IMO is not the way to go (not thick enough), especially if filler is in this area. so from inside to outside you will have the backing plate-door-gasket-mirror, this is the sandwich called a mirror assembly that is all held together with 3 screws. most of our vendors have these pieces from $40 to $50 each. even if you use another type of mirror, use or fabricate a backing plate, or you'll be tightening or reinstalling mirrors often __________________ -02 avalanche (daily driver) -66 gto ragtop 389/400 (garage queen, hand-me-down from dad) -72 Tribute Trans Am (6.0LS/T56 6-speed) in progress -2003 YUKON (Wife's) -71 gmc swb fleet (current project, gonna shave everything, bags, stuff w/ 20's, gen III powertrain) -48 3100 SWB - 12/31/23 LONG TERM Project

03-16-2011, 10:19 AM	#5
ubtripn Registered User Join Date: Apr 2010 Location: Boise, ID Posts: 1,280	Re: PO bondoed the door mirror holes, can I tap and thread them? Perfect!!!!!!!!!!!!!!!!!!!!!!!1 Thank you!

03-17-2011, 05:20 PM	#6
68chevyLQ4 Registered User Join Date: Jan 2011 Location: California Posts: 126	Re: PO bondoed the door mirror holes, can I tap and thread them? Who sells the backing plates?? I have the same issue with my truck.. Want to put the stock round mirrors back on

03-17-2011, 06:15 PM	#7
lofly'a Registered User Join Date: May 2000 Location: Alexandria, LA 71301 Posts: 1,451	Re: PO bondoed the door mirror holes, can I tap and thread them? i found them here: http://www.gmcpaulstruckparts.com/Exterior.htm or you can make your own as i did with a piece of 1/4" flat bar drilled and tapped. __________________ -02 avalanche (daily driver) -66 gto ragtop 389/400 (garage queen, hand-me-down from dad) -72 Tribute Trans Am (6.0LS/T56 6-speed) in progress -2003 YUKON (Wife's) -71 gmc swb fleet (current project, gonna shave everything, bags, stuff w/ 20's, gen III powertrain) -48 3100 SWB - 12/31/23 LONG TERM Project

03-17-2011, 11:16 PM	#8
WIDESIDE72 Senior Member Join Date: Aug 2008 Location: Cedar Park, Texas Posts: 7,494	Re: PO bondoed the door mirror holes, can I tap and thread them? I always wondered if the backing plates were being repro'ed. Now I know!

03-18-2011, 09:29 PM	#10
Daddy Brim Senior Member Join Date: Feb 2011 Location: Clovis Ca. Posts: 632	Re: PO bondoed the door mirror holes, can I tap and thread them? I got mine, mirrors and backing plates from classicparts.com very easy to install. Attached Images Last edited by Daddy Brim; 03-18-2011 at 09:33 PM.

03-18-2011, 11:12 PM	#11
ubtripn Registered User Join Date: Apr 2010 Location: Boise, ID Posts: 1,280	Re: PO bondoed the door mirror holes, can I tap and thread them? Thanks everyone. I will do it the right way the first time.



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