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leaking gas very urgent

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

Mstrshkbrnnn
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Mstrshkbrnnn

leaking gas very urgent

Post by Mstrshkbrnnn » Mon Nov 11, 2019 12:14 am

So, I've owned my 96 r for about 3 months now, and I've noticed she is horrid on gas. I attributed that to my driving habits, and the fact that I haven't fully completed stage zero. Today I filled up my tank, and went home, and parked in my driveway (a steep incline), and sat in my car talking with the girlfriend for about ten minutes. When I got out I noticed a trail of water coming from underneath the car, and it didn't alarm me as I live in Seattle, and this is a regular occurrence. Then it hit me that it didn't rain today so I got nervous, and touched the wet patch of concrete and smelled my hand and it smelled like gas. I freaked out, and backed my car out of the driveway, and parked it on the street so that it would be on a level surface. I did the ultimate test to find out whether or not it was gas that was leaking, and held a lighter to the wet patch on the ground (after I moved the car), and sure enough it engulfed in flames. (it was kinda funny because my amazon delivery guy pulled up to my house, right as I lit my driveway on fire) anyway, it appears to be leaking from the filler neck/ gas tank connection. This is extremely concerning as I always notice wet spots under the car, but its never crossed my mind that I was leaking gas!! I need to take care of this ASAP because gas is NOT something I want to be leaking, especially since I daily this car. Any guidance will be GREATLY appreciated.
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'94 854 NA 287k (bought for $400)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)

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misha
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misha

Re: leaking gas very urgent

Post by misha » Mon Nov 11, 2019 1:41 am

I would say that it is leaking from the top of the tank...on fuel pump assembly rubber gasket.


'97 850 2.5 20v /fully equipped/ Motronic 4.4 / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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abscate
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abscate

Re: leaking gas very urgent

Post by abscate » Mon Nov 11, 2019 2:08 am

Search for a recent thread on dropping tank for repair. BlackBart Montana maybe?


Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

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erikv11
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erikv11

Re: leaking gas very urgent

Post by erikv11 » Mon Nov 11, 2019 9:11 am

First step go in through the fuel pump access hole and investigate. Hopefully it is just the rubber gasket at the top of the fuel pump i.e. replace it with a new one. Buy a Volvo branded gasket only for this one. This gasket fixes most of the leaks without any need to drop the tank. But if it doesn't then it's one of the hoses up there and you need to go back in through the fuel pump access hole and investigate some more ...


'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 210k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

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volvolugnut
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volvolugnut

Re: leaking gas very urgent

Post by volvolugnut » Mon Nov 11, 2019 2:52 pm

Questions for other advisers: Do the 850's have a problem with the fuel pump flange cracking and leaking? Is this system similar to the P2 design with recall?
volvolugnut


2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple parts cars.

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erikv11
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erikv11

Re: leaking gas very urgent

Post by erikv11 » Mon Nov 11, 2019 3:08 pm

Actually I have not heard of issues with any fuel pump flange on 850's.

There is a big circular nut (flange nut?) or collar, I wouldn't be surprised if those have indeed broken a few times as they can get pounded on pretty haphazardly in removal and install, but I haven't actually heard of any failures.


'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 210k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

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matthew1
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matthew1

Re: leaking gas very urgent

Post by matthew1 » Mon Nov 11, 2019 3:23 pm

Much 850 fuel tank information. Good luck and let us know what you find.


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1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

crlande
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crlande

Re: leaking gas very urgent

Post by crlande » Mon Nov 11, 2019 3:24 pm

Could be the filler neck retaining sleeve or the rubber seal under neath that.
https://www.fcpeuro.com/products/volvo- ... 70-3531428



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Clemens
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Clemens

Re: leaking gas very urgent

Post by Clemens » Mon Nov 11, 2019 4:05 pm

Just a general word of advice: if you have a car that old, it always pays off to inspect fluid stains under the car unless it is a hat day and the AC was on.
Also, it weirds oit people if you crawl on the floor licking and sniffing fluids...

As for the fuel leak: as others said, check the huge nut that holds the pump in place. I had a leak there after replacing my first furl pump and it always smelled like gas till I fully tightened it a while later.


Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V

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volvolugnut
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volvolugnut

Re: leaking gas very urgent

Post by volvolugnut » Mon Nov 11, 2019 4:41 pm

Good general troubleshooting info is to know the smell, color, etc. of all your cars fluids. Then you can determine what is leaking. Can't recommend the flame test. That is kinda funny, though.

volvolugnut


2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple parts cars.

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