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wpicotte Samba Member
Joined: August 27, 2012 Posts: 49
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Posted: Tue Jun 24, 2025 2:13 pm Post subject: Cannot seat fuel overflow tanks |
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I've resealed my 87 Vanagon gas tank and have replacement fuel overflow / vapor tanks, as well. I'm struggling mightily to seat the overflow tanks, especially on the passenger side.
The hard plastic line is running over the inside, angled corner and best I can tell, is not creating interference. However, after running the bolt though the forward slot, I cannot get adequate force on the tank to mate the rear side notch. I've tried from every angle and it just doesn't want to go.
I'm tempted to elongate the bolt slot slightly so that with a little flex, the bolt can thread through with the rear notch is already in place.
Is there a trick to these things that I'm missing? |
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MarkWard Samba Member

Joined: February 09, 2005 Posts: 18690 Location: Retired South Florida
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Posted: Tue Jun 24, 2025 2:46 pm Post subject: Re: Cannot seat fuel overflow tanks |
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They do fight. Clean the rectangular recess in the fender well, and use a liberal spray of silicone on the fender and the tank. That usually will let them fully seat. |
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AlfromNH Samba Member
Joined: August 04, 2024 Posts: 188 Location: NH
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Posted: Tue Jun 24, 2025 3:43 pm Post subject: Re: Cannot seat fuel overflow tanks |
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I recently struggled with this. I found by putting the tank over the bolt first, I was then able to jam it up into the “pocket” in the fender well.
Like everything else related to the tank reseal, it was way more trouble than it would be for someone with an actual lift… _________________ ‘88 2wd Auto Westy project |
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wpicotte Samba Member
Joined: August 27, 2012 Posts: 49
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Posted: Tue Jun 24, 2025 5:52 pm Post subject: Re: Cannot seat fuel overflow tanks |
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AlfromNH wrote: |
I recently struggled with this. I found by putting the tank over the bolt first, I was then able to jam it up into the “pocket” in the fender well.
Like everything else related to the tank reseal, it was way more trouble than it would be for someone with an actual lift… |
Yah, that's the only way to install it, I believe.
I have not been able to get the new tanks in. They're plastic replacements from Van Cafe. I was able to snap the original right into place. |
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Wildthings Samba Member

Joined: March 13, 2005 Posts: 52269
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Posted: Tue Jun 24, 2025 8:30 pm Post subject: Re: Cannot seat fuel overflow tanks |
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Figure out a lever system to force the tank into position, and yes use some kind of lube like spray silicone or even dish soap. |
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vanis13 Samba Member

Joined: August 15, 2010 Posts: 4371 Location: ABQ NM USA.... Except when not
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Posted: Tue Jun 24, 2025 8:39 pm Post subject: Re: Cannot seat fuel overflow tanks |
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remembering from last time I did this job, I elongated the hole that takes the threaded stud and that helped a ton. _________________ 83.5 Westy with Subaru 2.5, 4 spd manual, center seat, COLD A/C on 134a!, Winter camp heated with an Espar B4 gasoline furnace
www.SuperVanagon.com - some stuff I make |
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Timwhy Samba Member

Joined: January 01, 2009 Posts: 4090 Location: Maine
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jlrftype7 Samba Member
Joined: July 24, 2018 Posts: 4514 Location: Chicago
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Posted: Wed Jun 25, 2025 5:45 am Post subject: Re: Cannot seat fuel overflow tanks |
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TO quote Alfrom NH
""""""I recently struggled with this. I found by putting the tank over the bolt first, I was then able to jam it up into the “pocket” in the fender well.
Like everything else related to the tank reseal, it was way more trouble than it would be for someone with an actual lift…"""""
I installed the Aluminum Tanks from Van Cafe. If you thought the old plastic tanks didn't flex much when reinstalling, try welded Alloy tanks...
And I WAS on a lift with the Vanagon. Anyway, it's not an easy job, but this technique ^^^^ was what worked for me as well.
I added White Lithium Grease on the backside of the tanks and the mating body since the tanks were metal. _________________ '68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto |
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wpicotte Samba Member
Joined: August 27, 2012 Posts: 49
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Posted: Wed Jun 25, 2025 8:55 am Post subject: Re: Cannot seat fuel overflow tanks |
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vanis13 wrote: |
remembering from last time I did this job, I elongated the hole that takes the threaded stud and that helped a ton. |
Yep, did the same on the passenger side but still no joy. |
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wpicotte Samba Member
Joined: August 27, 2012 Posts: 49
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Posted: Wed Jun 25, 2025 8:55 am Post subject: Re: Cannot seat fuel overflow tanks |
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Timwhy wrote: |
Have seated these tanks a few times on my Vans. I used a block of wood and rubber mallet to pop them back in place.
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Is this with the original tanks or replacements? |
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wpicotte Samba Member
Joined: August 27, 2012 Posts: 49
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Posted: Wed Jun 25, 2025 8:58 am Post subject: Re: Cannot seat fuel overflow tanks |
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jlrftype7 wrote: |
TO quote Alfrom NH
""""""I recently struggled with this. I found by putting the tank over the bolt first, I was then able to jam it up into the “pocket” in the fender well.
Like everything else related to the tank reseal, it was way more trouble than it would be for someone with an actual lift…"""""
I installed the Aluminum Tanks from Van Cafe. If you thought the old plastic tanks didn't flex much when reinstalling, try welded Alloy tanks...
And I WAS on a lift with the Vanagon. Anyway, it's not an easy job, but this technique ^^^^ was what worked for me as well.
I added White Lithium Grease on the backside of the tanks and the mating body since the tanks were metal. |
Good to know. I had a leak from the overflow on the driver side prior to this most recent escapade. Hoping it came from some of the old hoses I've relaced, but if the leak persists then plan B is an aluminim tank. |
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Timwhy Samba Member

Joined: January 01, 2009 Posts: 4090 Location: Maine
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wpicotte Samba Member
Joined: August 27, 2012 Posts: 49
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Posted: Wed Jun 25, 2025 9:10 am Post subject: Re: Cannot seat fuel overflow tanks |
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Timwhy wrote: |
wpicotte wrote: |
Is this with the original tanks or replacements? |
Original tanks |
Thanks. I was able to snap the originals back into place by hand. The dimple on replacements look slightly different, in that their edges are more rounded. This may be part of the issue, not sure. Regardless, no amount of force that I've applied has gotten them into place. |
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bobbyblack  Samba Member

Joined: May 21, 2015 Posts: 4615 Location: United States, Iowa
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Posted: Wed Jun 25, 2025 12:44 pm Post subject: Re: Cannot seat fuel overflow tanks |
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Like others answering in this thread, I have had multiple difficulties getting my tanks reinserted into the dimple. I used a 5 foot piece of 2x4, and made a fulcrum on the tire or another piece of wood to create massive force. They did pop in, I am pretty sure at near breaking points. I'm glad there are replacement options. _________________ '87 Westy 'Flossie','86 Westy 'R1','86 tintop GL - Subi2.2 'J2','83.5 stock tintop L 'ZoomBus','74 Karmann Ghia, '63 Notch |
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SCM Samba Member

Joined: January 26, 2011 Posts: 3357 Location: Bozeman MT
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Posted: Wed Jun 25, 2025 1:23 pm Post subject: Re: Cannot seat fuel overflow tanks |
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jlrftype7 wrote: |
If you thought the old plastic tanks didn't flex much when reinstalling, try welded Alloy tanks...
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I'm glad to hear it wasn't just my own ineptitude.
I battled with my alloy tanks for quite some time then pulled out the utility knife, cut away some undercoating that was in the recesses and added a few thick washers to the bolts between the tank and wheel well so that I could tighten the bolts without popping the tanks out of the recess.
Why those fine German Engineers didn't just use TWO bolts to attach the tanks is beyond me. _________________ '91 Westfalia GL Automatic (GTA "Turbo" Rebuild w/Peloquin) and 2.3L GoWesty Engine |
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jlrftype7 Samba Member
Joined: July 24, 2018 Posts: 4514 Location: Chicago
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Posted: Thu Jun 26, 2025 5:32 am Post subject: Re: Cannot seat fuel overflow tanks |
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SCM wrote: |
jlrftype7 wrote: |
If you thought the old plastic tanks didn't flex much when reinstalling, try welded Alloy tanks...
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I'm glad to hear it wasn't just my own ineptitude.
I battled with my alloy tanks for quite some time then pulled out the utility knife, cut away some undercoating that was in the recesses and added a few thick washers to the bolts between the tank and wheel well so that I could tighten the bolts without popping the tanks out of the recess.
Why those fine German Engineers didn't just use TWO bolts to attach the tanks is beyond me. |
"""Why those fine German Engineers didn't just use TWO bolts to attach the tanks is beyond me."""
Those bolt costs add up when you're making tens of thousands of vehicles....  _________________ '68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto |
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