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Gas Smell Volvo 850 GLT

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
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Gas Smell Volvo 850 GLT

Post by mecheng » Fri Feb 07, 2020 6:49 am

Good morning, I am noticing a gas smell in my garage which is coming from my wife's Volvo.
I read this excellent post by CN90 which lists the 4 potential causes.

viewtopic.php?t=60269


I inspected the hose, and the fuel pump access port.

1)The wax sealant is fine, I added some RTV gas resistant compound on top of it, to just ensure a perfect seal. No change in smell

2)Looking at the end of the suspect hose, 9463088 it is not cracked, I can't see the other end.

3)Gasket on fuel pump seal,PN 9447141 I don't know how to tell if this is leaking.

4)I will fill up and see if the inlet hose gasket is leaking.6842188

Is there a way to pinpoint what is causing the leak? Should I remove and replace the hose?

Does the gasket on the fuel pump seal go bad or is it mainly the hose? What about the gasket on the fuel sending unit.?

Thank you
Last edited by mecheng on Fri Feb 07, 2020 7:57 am, edited 1 time in total.
1998 Volvo S70 T5 - SE - 240km - Sold July 2018
1997 Volvo 850 GLT - 190km
Boost is my drug of choice

850 LPT
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Re: Gas Smell Volvo 850 GLT

Post by 850 LPT » Fri Feb 07, 2020 6:53 am

I would also inspect the fuel filler neck. There is a collar connecting the pipe to the tank which can fail I believe.

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96' 850 sedan, base, auto, pewter/charcoal, 115k miles
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Re: Gas Smell Volvo 850 GLT

Post by bmdubya1198 » Fri Feb 07, 2020 7:51 am

Yes, check for any signs of leak on the filler neck. Especially where it goes into the tank. There's a v-band style clamp holding them together that I've seen rust out.
2000 V70R Venetian Red/Charcoal M56 Swapped 195k
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Re: Gas Smell Volvo 850 GLT

Post by mecheng » Fri Feb 07, 2020 7:58 am

bmdubya1198 wrote:
Fri Feb 07, 2020 7:51 am
Yes, check for any signs of leak on the filler neck. Especially where it goes into the tank. There's a v-band style clamp holding them together that I've seen rust out.
I updated the original post link, it has the 4 areas.

Do you mean this area?

viewtopic.php?t=60291
1998 Volvo S70 T5 - SE - 240km - Sold July 2018
1997 Volvo 850 GLT - 190km
Boost is my drug of choice

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Re: Gas Smell Volvo 850 GLT

Post by bmdubya1198 » Fri Feb 07, 2020 8:00 am

mecheng wrote:
Fri Feb 07, 2020 7:58 am
bmdubya1198 wrote:
Fri Feb 07, 2020 7:51 am
Yes, check for any signs of leak on the filler neck. Especially where it goes into the tank. There's a v-band style clamp holding them together that I've seen rust out.
I updated the original post link, it has the 4 areas.

Do you mean this area?

viewtopic.php?t=60291
Yup, the first picture. Right where the clamp is that connects the neck to the tank.
2000 V70R Venetian Red/Charcoal M56 Swapped 195k
2003 S60 2.4T Silver/Black 112k
2007 XC90 V8 AWD Sport Titanium Grey/Black 166k
1991 944 Turbo Dark Green/Beige 173k
1992 245 Base White/Beige 249k
2006 BMW 330i
1999 BMW 528i
Sold-
2000 S70 GLT Mystic Silver/Taupe 253k
1993 944 Base Beige/Beige 221k
1998 V70 GLT Black/Beige 199k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k

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Re: Gas Smell Volvo 850 GLT

Post by ToriWhite » Fri Feb 07, 2020 1:06 pm

Your local garage may have a little hand-held sniffer machine, it was a godsend for pinpointing when I ran into this. Until then, take advantage of your sunroof to vent fumes!

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Re: Gas Smell Volvo 850 GLT

Post by rguzz » Fri Feb 07, 2020 1:36 pm

Is it a fresh gas smell? Probably suggested already, check the hoses to the rollover valve to see if they are intact. That was my source.There is either a gasoline leak or fumes from the vent system doing this. Usually pretty easy to find out which. Follow your nose, front or rear of the car? Tank area or otherwise, basically.

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Re: Gas Smell Volvo 850 GLT

Post by mecheng » Fri Feb 07, 2020 1:43 pm

rguzz wrote:
Fri Feb 07, 2020 1:36 pm
Is it a fresh gas smell? Probably suggested already, check the hoses to the rollover valve to see if they are intact. That was my source.There is either a gasoline leak or fumes from the vent system doing this. Usually pretty easy to find out which. Follow your nose, front or rear of the car? Tank area or otherwise, basically.
I don't notice any smell in the car and zero leaks. The smell is outside the car. Can you point me to where the rollover valve is/
Thanks
1998 Volvo S70 T5 - SE - 240km - Sold July 2018
1997 Volvo 850 GLT - 190km
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Re: Gas Smell Volvo 850 GLT

Post by erikv11 » Fri Feb 07, 2020 1:52 pm

mecheng wrote:
Fri Feb 07, 2020 6:49 am
... Does the gasket on the fuel pump seal go bad or is it mainly the hose? ...
Yes, yes yes yes on the gasket. I've had that fix a gas leak at least twice. They get hard and seal poorly or even crack.

By far the way to go is to pull the cover on the fuel pump and try to get an eyeball on the leak, I'd keep pushing that. And look up from under the car etc.

I don't think the "wax" coating on the wire entry port actually leads to fuel leakage, but rather it breaks down and crumbles away either with age or when there is a leak causing gas to pool up on top of it.

Rollover valve is right by the fuel filter: viewtopic.php?f=1&t=70426
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Re: Gas Smell Volvo 850 GLT

Post by abscate » Fri Feb 07, 2020 3:01 pm

I’ve got a 1998 gas tank out if any pictures are needed
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