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#1 |
Registered User
Join Date: Dec 2015
Location: San Antonio, Texas
Posts: 60
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Filliing/Plugging the Gas Tank Hole on the Cab
I'm new to fabrication and welding, I'd just like to share my idea and hope it helps someone. Be easy on me.
I removed the tank from the cab and put in a "under bed" tank. I was left with a hole in the cab. I'm not a good enough welder to put a shave plate and I'm definitely too broke to paint after that. So I decided to modify a cap to seal the hole and, as a plus, retain the stock look. Here is the Video for those interested https://www.youtube.com/watch?v=tSJAcwcTjm0&t=8s And here is the tutorial for those that prefer pictures. Supplies: 4 inches of all thread and 2 matching nuts ... or bolt and nut. Gas Cap from auto part store Filler neck grommet Some thin metal for making a huge washer. Optional: peel and seal or equivalent Tools: Welder: Or epoxy, JB Weld, Etc. Something to cut metal: I used a cheap jigsaw and metal cutting blades Drill and drill bit slightly larger than thread width Get yourself a cap for under $10 at the local auto part store. Weld a nut on the inside of the cap. You can also use epoxy, JB Weld, or some other adhesive if you don't have a welder. Screw in some all thread and tack it so it wont spin off Or, you can just use a bolt instead of a nut and thread.
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1970 C10 Stepside SWB - 468 BBC Last edited by bzblaine; 09-12-2019 at 12:34 PM. |
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#2 |
Registered User
Join Date: Dec 2015
Location: San Antonio, Texas
Posts: 60
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
Cut out a large washer from the steel. I used 2-3mm thick steel diamond plate that I got from the scrap yard. Drill a hole in the center big enough for you thread/bolt. You want this to be slightly larger than the Filler Neck Grommet. I added Peel and seal on the back just for a cushion and a better seal.
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1970 C10 Stepside SWB - 468 BBC |
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#3 |
Registered User
Join Date: Dec 2015
Location: San Antonio, Texas
Posts: 60
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
Test fit and cut the thread to size. I used about 4 inches. I rounded the end of the tread to make it easier to thread on the nut.
Set the cap in the hole. Center it the best you can. Slide the plate on the back. Push it flush against the back of the grommet. Screw the nut all the way down do it pinches the grommet between the cap and plate. Make sure it is center up.
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1970 C10 Stepside SWB - 468 BBC |
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#4 |
Registered User
Join Date: Dec 2015
Location: San Antonio, Texas
Posts: 60
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
And your done! it looks great to me. Still looks factory. And there is no hole that water can leak through. I sprayed it with a water hose to make sure
![]() I hope this helps. This was just my cheap and easy way to cover this hole. Let me know what you think! The video for this is: https://www.youtube.com/watch?v=tSJAcwcTjm0&t=8s And it never hurts to subscribe to the channel. I have a ton of things that need to be done to the truck so ill be regularly uploading new videos.
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1970 C10 Stepside SWB - 468 BBC |
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#5 |
Senior Member
![]() Join Date: May 2015
Location: Sierra Vista, Arizona
Posts: 398
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
I'm the guy who commented on youtube, cool to see that you're a member on here.
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1968 C10 SWB 400SBC with VN327 20's 1972 K5 Blazer 383SBC 2011 Cadillac CTSV |
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#6 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
Good job. An easy way to do the same thing is find an old tank and just cut the filler neck off and reinstall it.
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![]() 94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) |
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#7 | |
Registered User
Join Date: Dec 2015
Location: San Antonio, Texas
Posts: 60
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![]() Quote:
Well I appreciate it! I’ve been a member on here for a long time. This forum has helped tremendously with my truck, so I figured I could return the favor. Subscribe and share if you could!
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1970 C10 Stepside SWB - 468 BBC |
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#8 | |
Registered User
Join Date: Dec 2015
Location: San Antonio, Texas
Posts: 60
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
Quote:
Yeah that would have been a great option. In retrospect, I would have cut the original neck off before scrapping the tank.
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1970 C10 Stepside SWB - 468 BBC |
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#9 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
Best one I have seen it to use it as a locking storage with a gas cap and cap the tube off and secure from inside.
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#10 |
Registered User
Join Date: Dec 2015
Location: San Antonio, Texas
Posts: 60
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
man... that's a waaay better Idea! A smugglers spot! lol.
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1970 C10 Stepside SWB - 468 BBC |
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#11 |
Registered User
![]() Join Date: Feb 2019
Location: Nor Cal
Posts: 822
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
Good Job, Nice option.
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1968 C20 Fleetside 396 4sp PS PB AC CST . https://www.youtube.com/watch?v=RWK8GgWD4uA |
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#12 |
Registered User
Join Date: Jan 2016
Location: Barber City, CA
Posts: 4,782
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
clever and clean.. thanks for taking time to share
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I started out with nothing - and I still have most of it |
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#13 |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,109
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
Subbed your U tube channel & liked.
Great idea ![]() .
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#14 |
Registered User
Join Date: Jan 2019
Location: St Peters, MO
Posts: 440
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
I wanted to keep my original cap since the patina matched the paint. I installed a new filler neck grommet and used a 5" piece of 1" angle steel as a brace on the inside of the cab. I drilled a hole in the angle for a sheet metal screw to secure the cap through its center hole. I was only able to catch one or two threads, so I drilled two smaller holes on each side of the center hole of the brace and used wire to safety-wire the cap to the brace using the locking tabs/ears on the cap. That should keep the cap from bouncing down the highway should the screw loosen.
~Tim Last edited by tim_mc; 09-13-2019 at 08:40 AM. |
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#15 |
Registered User
Join Date: Aug 2020
Location: Austin, Texas
Posts: 6
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
god bless the search function for the forum. This is EXACTLY what I was looking for. Has it held up well? any leaks or anything?
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#16 |
Registered User
Join Date: Jul 2014
Location: South East Ohio
Posts: 644
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
That is a nice option. I removed my tank and want to classic look of the filler neck and cap. This looks like a good way to go.
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#17 |
Registered User
Join Date: Dec 2015
Location: San Antonio, Texas
Posts: 60
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
Thank you! I wanted to make a good option that didnt require having to paint anything. This worked out great and I dont have to worry about it leaking.
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1970 C10 Stepside SWB - 468 BBC |
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#18 |
Senior Member
![]() Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,234
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
i did this years ago only i used a carriage bolt with a litt rtv where it goes though cap so far it has held up great
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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#19 |
Registered User
Join Date: Dec 2015
Location: San Antonio, Texas
Posts: 60
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
That was my biggest issue, I didnt want to put a bolt through the cap I wanted it to be nice and smooth on the outside. I think it came out ok. Do you have a picture of your?
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1970 C10 Stepside SWB - 468 BBC |
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#20 |
Registered User
Join Date: Aug 2020
Location: Austin, Texas
Posts: 6
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
why did you cut the filler neck off of the original tank and use that and the original cap to plug the hole? Ive even heard of people putting a kill switch in there.
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#21 |
Registered User
Join Date: Dec 2015
Location: San Antonio, Texas
Posts: 60
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
When I Relocated the tank, I sold my old tank. i shoved a beer can in there for a couple weeks until I made this contraption.
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1970 C10 Stepside SWB - 468 BBC |
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#22 |
Senior Member
![]() Join Date: Oct 2013
Location: Garden City, GA
Posts: 295
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
That would make a killer beer dispensing device. Remove the cap - pull out a beer.
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#23 |
Registered User
Join Date: Dec 2015
Location: San Antonio, Texas
Posts: 60
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
hahaha! That is great!
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1970 C10 Stepside SWB - 468 BBC |
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#24 |
Roto Reuter thats the name...
![]() Join Date: Feb 2010
Location: Darien, NY
Posts: 1,853
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
Nice job. I did that on my K10 build. Didn't mess with the tank fill neck at all.
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~ Dan ![]() My 70 K10 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=782232 My 71 SWB build:http://67-72chevytrucks.com/vboard/s...d.php?t=651394 1970 SWB Fleet K10 4X4, 5.3L LM7, 4L60E, Dakota Digital RTX, Vintage Air, Ididit tilt 1971 SWB Fleet C10 - Original SWB Arizona truck, new custom restoration project "Kick out your motor and drive while you're still alive - kick it out!" - Heart 1977 |
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#25 | |
Registered User
Join Date: Dec 2015
Location: San Antonio, Texas
Posts: 60
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Re: Filliing/Plugging the Gas Tank Hole on the Cab
Quote:
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1970 C10 Stepside SWB - 468 BBC |
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filler neck, gas cap, gas tank, plugging hole |
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