cj7 mounting gas tank into new frame. - JeepForum.com
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Unread 08-09-2013, 12:00 AM   #1
danfrye
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1978 CJ7 
 
Join Date: Jul 2013
Posts: 33
cj7 mounting gas tank into new frame.

Transfering cj7 to a non-rusty frame. Not sure how the gas tank mounts into the frame. Does it mount to the back rail/bumper of the frame??

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Unread 08-09-2013, 12:18 AM   #2
row684
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1984 CJ7 
 
Join Date: Sep 2008
Location: Logan, UT
Posts: 691
Quote:
Originally Posted by danfrye
Transfering cj7 to a non-rusty frame. Not sure how the gas tank mounts into the frame. Does it mount to the back rail/bumper of the frame??
There is studs that stick down through the rear crossmember, if you lay on the floor and look up you will see them with a flashlight.
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Unread 08-09-2013, 01:33 AM   #3
paveland
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1986 CJ7 
 
Join Date: Nov 2008
Location: Tokyo, Japan
Posts: 34
On my 86 cj7 the tank mounted to the skidplate with a strap and the skidplate bolted to the crossmembers. My rear crossmeber didn't have studs, just some carriage bolts that go through square holes. I believe the inside crossmember was just regular nuts and bolts.
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Unread 08-09-2013, 06:55 AM   #4
danfrye
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1978 CJ7 
 
Join Date: Jul 2013
Posts: 33
Ahhhh skidplate. Makes sence. Yeah mine is a 1978 so no nubs and no square holes... But holes where a skid plate could bolt up. Bumper is bent though so i prob beed to get it straightend first? What if i want a different bumper on there? How does that work if the gas tank is mounted to that rear rail? thanks again for the help... This is helping a lot.
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Unread 08-09-2013, 05:52 PM   #5
paveland
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1986 CJ7 
 
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Quote:
Originally Posted by danfrye View Post
Ahhhh skidplate. Makes sence. Yeah mine is a 1978 so no nubs and no square holes... But holes where a skid plate could bolt up. Bumper is bent though so i prob beed to get it straightend first? What if i want a different bumper on there? How does that work if the gas tank is mounted to that rear rail? thanks again for the help... This is helping a lot.
Not sure about the aftermarket bumper it could replace the rear crossmember or bolt to it somehow. As far as the rear crossmember goes you could either try and pound it out, make one, or just order one online. I believe quadratec sells them.
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Unread 08-09-2013, 06:13 PM   #6
sbcranger
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1985 CJ7 
 
Join Date: Mar 2009
Location: long island
Posts: 309
the piece you guys are talking about is called the rear cross-member which has 2 body mounts on it. i cannot speak for all bumpers ever made but the overwhelming majority of bumpers will bolt to the cross-member.

as for how the fuel tank is mounted is via the skidplate. the tank is strapped into the skid-plate, and then the skid mounts to the rear cross-member, and the next cross-member forward. on the two frames i had, my 85 frame had the "studs" which are actually just small carriage bolts with keeper. the other frame i had was earlier, i forget what year, but had the short shock towers. that one did not have any bolts or anything, but i suspect that was a replacement cross-member.
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Unread 08-10-2013, 05:04 AM   #7
pipster453
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1981 CJ7 
 
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My 81 when I got it had no studs. Just regular nuts and bolts mounting the skid plate to the cross members. I did a yj tub conversion and needed a new rear crossmember so I ordered one from quadratech with no holes so I could put the body mounts where I needed them.
The rear bumper mounts through the rear crossmember. If you don't still have them there were basically L brackets that bolt through the frame and bend to the rear crossmember for the bumper hardware to go through. The rear cross member is too thin to support a bumper of any weight by itself. I hade to make my own as they were no longer on the Jeep when I got it.
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Unread 08-10-2013, 04:38 PM   #8
danfrye
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1978 CJ7 
 
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Awesome. Yep, what you guys are saying sounds right. The skidplate was AOL when i got the jeep and the tanks was bolted and strapped directly to the frame. Kind of scary actually. so, i guess im in the market for a skidplate.

Regarding the aftermarket bumper, the L bracket attaches to the bottom of the frame rails then? And then the bumper to the brackets?
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Unread 08-10-2013, 07:20 PM   #9
paveland
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1986 CJ7 
 
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Location: Tokyo, Japan
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If I were you I'd start searching locally for a good used skid plate. I imagine they would be on ebay but it would be $$$ to ship. Shouldn't be to hard to find on craiglist or from a local 4x4 club.

Sounds right for the aftermarket bumper, but I would follow whatever the manufacturer recommends. As previously stated I wouldn't bolt anything to the flimsy rear crossmember.
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Unread 08-10-2013, 07:45 PM   #10
pipster453
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1981 CJ7 
 
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Posts: 28
The brackets bolt through the side of the frame. Bolts horizontal. One on each side of the frame. Two per side of Jeep. If you have to replace the rear crossmember you can drill holes in it and the brackets to match your bumper or if you buy the Pre drilled one then drill the brackets to match. They may make and sell those brackets, I never looked as it was too easy to make myself. Let us know what you figure out.
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Unread 08-10-2013, 07:50 PM   #11
pipster453
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1981 CJ7 
 
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I bought my skid plate off Craig's list but it was from a guy who has a couple garages full of cj parts. It was thrown in with the axles I bought from him but he was only asking $20. I don't know where you are but that guy is near Columbus Ohio.
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Unread 08-10-2013, 10:26 PM   #12
danfrye
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Thanks again. It was a huge help. fyi... I ordered a skidplate from quadretrac.com... So its on the way. I may have a local shop take care of my rear crossmember issue.

Thanks again
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