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850 fuel tank lock ring

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
Teddy1975
Posts: 189
Joined: Wed Jan 06, 2016 11:57 am
Year and Model: 850 1996
Location: Denmark
Denmark

Re: 850 fuel tank lock ring

Post by Teddy1975 » Wed May 17, 2017 6:23 am

I've seen that tool before, it looks nice.

Problem is the $35 it costs in the US will quickly triple with shipping, customs (plus customs handling fee of $25) and 25% value added tax before it reaches my door step.

I'll try to make my own tool first, at least I can bring the locking ring I got from Erik with me when I go to a hardware store the next time. Hopefully my worries regarding the ring having been off the tank for so long will be put to shame.
Current: 850 2.0L N/A, 4 door 1996 manual
Previous: 740 2.3L N/A, 5 door 1992 manual, and S70 2.5T 1999 manual

JimBee
Posts: 1438
Joined: Tue Dec 09, 2008 9:23 pm
Year and Model:
Location:

Re: 850 fuel tank lock ring

Post by JimBee » Fri May 19, 2017 7:32 pm

That Schley tool is definitely the right concept:
https://www.amazon.com/Schley-Products- ... B00820NOWG

It looks what I had in mind when I was going to make one from a pvc fitting, piece of pipe or whatever. It would be fairly easy with a piece of stock the right diameter. Just set it on top of the ring and mark off the tabs with a Sharpie. Then set your table saw blade to about 1/4" height and, with safety glasses in place and keeping the fingers clear, make the cuts.

A hole could be bored across the diameter of the pvc fitting to slide through a breaker bar handle, long screw driver, etc., for leverage.

Another option, which is what I use is this oil filter pliers from Harbor Freight:
https://www.harborfreight.com/catalogse ... ter+pliers

For both oil filters and fuel pump rings I'll rate this about 90+ % effective—not perfect but usually gets the job done. I can think of one ring that I could not loosen with it and hitting the vanes with a screw driver didn't budge it, just broke off the vanes. Fortunately, that was junk yard car so I just left it.

cn90
Posts: 5607
Joined: Wed Mar 31, 2010 9:54 am
Year and Model: 1998 S70 GLT
Location: Omaha NE
Been thanked: 1 time

Re: 850 fuel tank lock ring

Post by cn90 » Fri May 19, 2017 7:52 pm

You can use a channel lock pliers, just zip tie both ends so it is tight, then use a screwdriver and turn the channel lock pliers.

http://www.pelicanparts.com/techarticle ... cement.htm
1998 S70 GLT 160K+
2005 XC90 2.5T 85K+

User avatar
dosbricks
Posts: 1116
Joined: Thu Dec 30, 2004 6:17 pm
Year and Model: '96 855, '98 S70
Location: South Texas
United States of America

Re: 850 fuel tank lock ring

Post by dosbricks » Sat May 20, 2017 7:15 pm

I left the ring off our S70 for about ten days and had no problem re-installing it. I wiped the ring threads with a tiny bit of petroleum jelly and then wiped it off with a paper towel leaving as little residue as possible. I fail to see how exposure to humidity or whatever would cause the threads to swell.
'98 S70, 230k, purchased new in '98
'96 855 GLT, 163k, purchased lightly used in '99
Onceuponatime RIP '69 Shelby GT500 w/7.0 liter

Teddy1975
Posts: 189
Joined: Wed Jan 06, 2016 11:57 am
Year and Model: 850 1996
Location: Denmark
Denmark

Re: 850 fuel tank lock ring

Post by Teddy1975 » Sun May 21, 2017 5:12 am

dosbricks wrote: I left the ring off our S70 for about ten days and had no problem re-installing it. I wiped the ring threads with a tiny bit of petroleum jelly and then wiped it off with a paper towel leaving as little residue as possible. I fail to see how exposure to humidity or whatever would cause the threads to swell.
I'm not sure why it swells, likely from the gas fumes, but not too important anyway, it did on my car.

The warning in VADIS under the instructions of how to replace the fuel pump just reads: "Caution! Refit the nut on the tank sleeve. Otherwise, the neck will swell and it will be difficult to fit the nut later."

Still haven't gotten around to fixing it, I'll try to make a tool a bit like the Schley tool that fits around the ring fully, instead of just gripping it in two/three places to make sure the ring/nut goes on proper and won't ruin the threads on either neck nor ring/nut.

For now, I keep the fuel level lowish and I've made the floor access hatch air tight so no gas fumes gets into the car from there. It just annoys my inner purist to no end knowing I'm driving around with a broken fuel pump ring/nut.
Current: 850 2.0L N/A, 4 door 1996 manual
Previous: 740 2.3L N/A, 5 door 1992 manual, and S70 2.5T 1999 manual

cn90
Posts: 5607
Joined: Wed Mar 31, 2010 9:54 am
Year and Model: 1998 S70 GLT
Location: Omaha NE
Been thanked: 1 time

Re: 850 fuel tank lock ring

Post by cn90 » Sun May 21, 2017 7:25 am

Another trick is to use the Toilet Flange homemade tool. Info in forum.
Make sure you use a new Toilet Flange, usually made out of Plastic ABS.
1998 S70 GLT 160K+
2005 XC90 2.5T 85K+

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