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850 fuel tank lock ring

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1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
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Teddy1975
Posts: 187
Joined: Wed Jan 06, 2016 11:57 am
Year and Model: 850 1996
Location: Denmark
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850 fuel tank lock ring

Post by Teddy1975 » Mon May 15, 2017 8:43 am

What does one do if the locking ring on the fuel tank which holds the fuel pump in place has been left off for more than the Volvo recommended one hour only?

In my case it was a broken ring that has sat on the fuel tank for more than 1.5 years, making the part with the threads too swollen for me to screw on the ring.
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

Ozark Lee
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Re: 850 fuel tank lock ring

Post by Ozark Lee » Mon May 15, 2017 2:30 pm

That ring is very difficult to get lined up without it trying to cross thread. I don't think leaving the ring off for a period of time will cause the tank to swell.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
'99 V70XC - Nautic Blue
Previous:
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

tryingbe
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Year and Model: 94 855T
Location: Mesa, AZ, USA
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Re: 850 fuel tank lock ring

Post by tryingbe » Mon May 15, 2017 5:30 pm

Buy a new ring.

erikv11
Posts: 7485
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850s, S/V70s, 06 S60
Location: Iowa
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Re: 850 fuel tank lock ring

Post by erikv11 » Mon May 15, 2017 8:14 pm

He got a used (but working just fine when removed) ring. Seems like it should work fine? Hmmmm.
'95 854 T5-R || m4.4 || 180 k
'96 855 NA || 135 k
'98 V70 GLT || T5 tune-injectors-turbo || 265 k
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abscate
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Re: 850 fuel tank lock ring

Post by abscate » Mon May 15, 2017 9:13 pm

Whats up with the one hour recommendation for the lock ring? Can someone give me the third grade version of that please?
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rspi
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Year and Model: 850 T-5R Wagon
Location: Albuquerque, NM
United States of America

Re: 850 fuel tank lock ring

Post by rspi » Mon May 15, 2017 10:48 pm

I wouldn't worry about it. Just put the replacement ring on.
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Teddy1975
Posts: 187
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 » Mon May 15, 2017 11:42 pm

The new used ring itself is fine Erik and tryingbe, it's exactly the same size as the cracked one I've had to put on again with a zip tie holding it somewhat in place like a PO had done.

The one hour recommendation is from VADIS, to prevent swelling of the lip with the thread on the tank, do not leave the ring off for longer than max an hour, but no info as to what has to be done if it's left off for more. I'll give it another try later as the broken ring just isn't tight.

Thanks for your input,
Teddy
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
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Re: 850 fuel tank lock ring

Post by JimBee » Tue May 16, 2017 12:09 pm

Last time I changed a fuel pump the ring, which had apparently never been off since the car was new, came hard all the way. To make it easier to screw back on I sprayed the ring's threads with silicone as well as the threads on the tank neck. It spun back on quite easily.

Teddy1975
Posts: 187
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 » Tue May 16, 2017 1:12 pm

My problem yesterday was the ring would catch the start of the thread then twist and pop off on the opposite side. The only other time I've had to do this was on my 740, which was a breeze compared to this.

I raised the car and was about to drop the tank just to get more space to work in, but even the simplest things on this car has been made nearly impossible by previous owners shearing bolts, epoxy gluing things back together and whatnot.

Anyway, I'm considering fabricating a tool, but both my angle grinders are lent out to friends and all I have available for cutting anything is a dremel. Would something like this for an oil filter work instead? It can extend to 13.6 cm.

Image
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

Ozark Lee
MVS Moderator
Posts: 14505
Joined: Thu Sep 07, 2006 8:24 am
Year and Model: Many Volvos
Location: USA Midwest
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Re: 850 fuel tank lock ring

Post by Ozark Lee » Tue May 16, 2017 2:23 pm

The problem with the oil filter wrench is that it tries to deform the ring as you torque down on it and then it wants to bind. There actually is a specially made wrench to do the job that sells for about $35.00. Google "Schley SL 69800" and you can see what they are doing.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
'99 V70XC - Nautic Blue
Previous:
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

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