Door threads stripped ??????? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gregz69 · 04-27-2008, 09:46 PM

Ok guys I am stuck I went to mount some cherry doors on my cab and found most of the threads are stripped on the door side where the hinge bolts on ......Do any of you guys have a solution for this ...anything will help thanks guys...Greg

67_C-30 · 04-27-2008, 09:54 PM

I had this problem on one of my car hauler doors. I drilled them bigger with "U" drill (.368") and retapped the with 7/16 - 14 threads. You can use a 3/8 drill but the threads are a little tighter with the "U" drill. You will also have to make the slots in the hinges bigger and wider (which isn't a bad idea on these trucks anyway). I did mine with a 1/8" carbide burr in a die grinder, but you could do the same thing with a Dremel.

JimKshortstep4x4 · 04-28-2008, 02:34 AM

I have welded fine thread nuts to the inside of the mounting plate and also, retapped the threads to 7/16-20 as 67 C-30 did. Instead of opening up the slots, I machined the shank down where the slots line up with the bolt and remachined the 5/8" hex head to a 9/16" hex.

Jim

TravisH · 04-28-2008, 06:56 AM

you guys never heard of heli-coils?

cdowns · 04-28-2008, 07:06 AM

Quote:

Originally Posted by TravisH

you guys never heard of heli-coils?

dont last long in this application i tried em years ago

TravisH · 04-28-2008, 08:04 AM

Quote:

Originally Posted by cdowns

dont last long in this application i tried em years ago

The plate just too thin to hold them? I put one on my d/s A pillar a year ago without problems... though I've only been pushing the truck

Fastfun · 04-28-2008, 09:06 AM

Helicoils will not work because you are dealing with thin metal. What will work is a threaded insert for thin metals. I have attached a web page that has the threaded inserts. I believe that you need a 3/8-16 thread. You drill out the thread with a 9/16 drill and the insert is two pieces, one on each side of the metal and tighten the two pieces together and that sets your insert. The web site shows an insert that has been installed. Another option would be a rivet nut

http://www1.mscdirect.com/CGI/NNPDFF...8129&PMCTLG=00

Old Money · 04-28-2008, 04:39 PM

i had one stripped out. i was in a hurry and no welder so i double nutted it and its held. it took some effort and i had to talk to it nicely and it works. Old money.

Premium72 · 04-28-2008, 05:54 PM

yeah i used the wrong bolts in the original holes..(rookie!!) when i was doin mine 2 years ago. i drilld out and re-tapped em, perty good still!.. ha

04-27-2008, 09:46 PM	#1
gregz69 Registered User Join Date: Jul 2007 Location: Patterson California Posts: 6	Door threads stripped ??????? Ok guys I am stuck I went to mount some cherry doors on my cab and found most of the threads are stripped on the door side where the hinge bolts on ......Do any of you guys have a solution for this ...anything will help thanks guys...Greg

04-27-2008, 09:54 PM	#2
67_C-30 I have a radical idea! Join Date: Jan 2005 Location: Sweet Home Alabama! Posts: 6,513	Re: Door threads stripped ??????? I had this problem on one of my car hauler doors. I drilled them bigger with "U" drill (.368") and retapped the with 7/16 - 14 threads. You can use a 3/8 drill but the threads are a little tighter with the "U" drill. You will also have to make the slots in the hinges bigger and wider (which isn't a bad idea on these trucks anyway). I did mine with a 1/8" carbide burr in a die grinder, but you could do the same thing with a Dremel. __________________ '67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! Last edited by 67_C-30; 04-27-2008 at 09:54 PM.

04-28-2008, 02:34 AM	#3
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: Door threads stripped ??????? I have welded fine thread nuts to the inside of the mounting plate and also, retapped the threads to 7/16-20 as 67 C-30 did. Instead of opening up the slots, I machined the shank down where the slots line up with the bolt and remachined the 5/8" hex head to a 9/16" hex. Jim __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC Last edited by JimKshortstep4x4; 04-28-2008 at 02:34 AM. Reason: Wording

04-28-2008, 06:56 AM	#4
TravisH Registered User Join Date: Mar 2005 Location: Alberta Posts: 316	Re: Door threads stripped ??????? you guys never heard of heli-coils?

04-28-2008, 09:06 AM	#7
Fastfun Registered User Join Date: Jun 2005 Location: Scottsdale, AZ Posts: 615	Re: Door threads stripped ??????? Helicoils will not work because you are dealing with thin metal. What will work is a threaded insert for thin metals. I have attached a web page that has the threaded inserts. I believe that you need a 3/8-16 thread. You drill out the thread with a 9/16 drill and the insert is two pieces, one on each side of the metal and tighten the two pieces together and that sets your insert. The web site shows an insert that has been installed. Another option would be a rivet nut http://www1.mscdirect.com/CGI/NNPDFF...8129&PMCTLG=00

04-28-2008, 04:39 PM	#8
Old Money Registered User Join Date: Apr 2008 Location: Milton wi. 53563 Posts: 128	Re: Door threads stripped ??????? i had one stripped out. i was in a hurry and no welder so i double nutted it and its held. it took some effort and i had to talk to it nicely and it works. Old money.

04-28-2008, 05:54 PM	#9
Premium72 Registered User Join Date: Sep 2005 Location: Villa Rica Ga Posts: 889	Re: Door threads stripped ??????? yeah i used the wrong bolts in the original holes..(rookie!!) when i was doin mine 2 years ago. i drilld out and re-tapped em, perty good still!.. ha __________________ WombatFire, Art-Design-MADNESS Follow My Build and Adventures on Instagram

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