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 Blue65
A.k.a.: Yau
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| posted on August 30th, 2012 at 12:44 AM |
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Petrol smell
Hi - it seems petrol is splashing out of the cap (just a tiny bit) when I go driving. I've tried various petrol caps but I can still smell the
occasional smell of petrol when I turn a corner hard or brake hard. Is there any remedy for this?
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toey1984
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| posted on August 30th, 2012 at 02:24 AM |
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Hi, guessing its in a early beetle?
Other than knowing its the correct cap for that tank and putting new cork / rubber seals in the cap ( was a problem with my old buggy) and make sure
breather piping as crack free ( as this too could be your smell if it's not the cap itself)
Nathan
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Blue65
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| posted on August 31st, 2012 at 12:44 AM |
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| Quote: | Originally
posted by toey1984
Hi, guessing its in a early beetle?
Other than knowing its the correct cap for that tank and putting new cork / rubber seals in the cap ( was a problem with my old buggy) and make sure
breather piping as crack free ( as this too could be your smell if it's not the cap itself)
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Yes, its a 1960s era Beetle. Did all that. Maybe I'll try it again.
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silver
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| posted on August 31st, 2012 at 08:04 AM |
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check the seal under the fuel gauge sender
Keeping it real !
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68AutoBug
A.k.a.: Lee Noonan
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| posted on August 31st, 2012 at 01:04 PM |
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| Quote: | Originally
posted by Blue65
Hi - it seems petrol is splashing out of the cap (just a tiny bit) when I go driving. I've tried various petrol caps but I can still smell the
occasional smell of petrol when I turn a corner hard or brake hard. Is there any remedy for this?
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I can remember the 65 beetle fuel caps and they weren't very well made...
You may need to find a rubber washer to put on it...
the original washer will shrink or be pushed in over many years..
a new cap or washer should fix the problem of fuel smell...
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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bajachris88
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| posted on August 31st, 2012 at 06:07 PM |
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Maybe relevant, but i was in the same situation.
See, the stock breather pipe for my 69' goes from the filler neck, under the dash and back towards the tank near the passenger side then out under
the front wheel arch area on the passenger side. When i'd fill the tank up, particularly when taking right turns i'd get a fuel odour, and upon
investigation i culd see the breather pipe outlet near the wheel arch was damp. This 'seems' like the normal operation, but when full it allowed the
excess to creep up and out and maybe loose a few mL's of petrol which didn't bother me but would certainly make a smell.
NOW! Where I am going, is the reason i could smell the fuel on the outside during the normal breather operation, was because of the bonnet seal and
the seals for the indicators not being present (I believe). When you drive the cabin is often under vacuum (bernoulli's effect with windows down or
the vacuum from the rear of the car passing into the engine bay and channels in the roof as you drive), and this causes the cabin to suck in air from
the outside at the front into the bonnet, into the cabin (through the speaker grills, dash holes, demister vents etc). and thus, because i had no
seals for my indicators, nor any bonnet seal, the fumes from the petrol breather at the front could pass into the cabin easily and get 'sucked
in'.
After going nuts with silicone around the indicator wire holes and fitting a seal on the bonnet, it has cured it! Could possibly be the same cause for
yours if there are unsealed openings from the bonnet into atmosphere. (This includes holes for the inspection plate covers).
(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears. 
New engine in process: 94mm p&bs, 74mm C/w chomol Crank, 35.5x39 SP heads, turbo. Wierd combo, hopeful torque monsta! |
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Blue65
A.k.a.: Yau
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| posted on September 3rd, 2012 at 04:06 PM |
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| Quote: | Originally
posted by 68AutoBug
| Quote: | Originally
posted by Blue65
Hi - it seems petrol is splashing out of the cap (just a tiny bit) when I go driving. I've tried various petrol caps but I can still smell the
occasional smell of petrol when I turn a corner hard or brake hard. Is there any remedy for this?
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I can remember the 65 beetle fuel caps and they weren't very well made...
You may need to find a rubber washer to put on it...
the original washer will shrink or be pushed in over many years..
a new cap or washer should fix the problem of fuel smell...
LEE
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I've changed the washer twice. But I have noticed that when I pour in new petrol, the washer area is wet with petrol that has splashed upwards.
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Owner of a 1964 VW Beetle, 1641cc engine, etc..
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 vw54
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| posted on September 3rd, 2012 at 08:36 PM |
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check the small vent tube on the filler neck and the tube as well
if this is blocked it will pressurise the tank and force the fuel vapours past the cap gasket
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Blue65
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| posted on September 21st, 2012 at 09:33 PM |
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| Quote: | Originally
posted by vw54
check the small vent tube on the filler neck and the tube as well
if this is blocked it will pressurise the tank and force the fuel vapours past the cap gasket
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I checked the tube. Its OK. However the metal vent tube seems to have been pinched on the inside - inside the tank. Is that normal?
I squirted some WD40 from one side of the metal tube and the vapour does go through somewhat.
I made the opening even and I hope that will help.
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Owner of a 1964 VW Beetle, 1641cc engine, etc..
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Blue65
A.k.a.: Yau
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| posted on February 11th, 2013 at 11:37 AM |
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Just to conclude this discussion - I am happy to let everyone know that after I unpinched the vapor slot in the fuel tank neck - the issue of vapor
fumes has largely gone away.
I think the previous owner clamped the vapor slot thinking it would solve the fuel vapor problem. What he probably didn't realize was that fuel line
that runs inside the car chassis spine tunnel had rusted and was leaking - I got Volkscare to fix that.
Most of the vapor fumes are noticable esp after I pump in the fuel. But it does occur in rare odd moments when I'm doing normal easy driving.
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Owner of a 1964 VW Beetle, 1641cc engine, etc..
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vlad01
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| posted on February 12th, 2013 at 02:01 PM |
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| Quote: | Originally
posted by bajachris88
Maybe relevant, but i was in the same situation.
See, the stock breather pipe for my 69' goes from the filler neck, under the dash and back towards the tank near the passenger side then out under
the front wheel arch area on the passenger side. When i'd fill the tank up, particularly when taking right turns i'd get a fuel odour, and upon
investigation i culd see the breather pipe outlet near the wheel arch was damp. This 'seems' like the normal operation, but when full it allowed the
excess to creep up and out and maybe loose a few mL's of petrol which didn't bother me but would certainly make a smell.
NOW! Where I am going, is the reason i could smell the fuel on the outside during the normal breather operation, was because of the bonnet seal and
the seals for the indicators not being present (I believe). When you drive the cabin is often under vacuum (bernoulli's effect with windows down or
the vacuum from the rear of the car passing into the engine bay and channels in the roof as you drive), and this causes the cabin to suck in air from
the outside at the front into the bonnet, into the cabin (through the speaker grills, dash holes, demister vents etc). and thus, because i had no
seals for my indicators, nor any bonnet seal, the fumes from the petrol breather at the front could pass into the cabin easily and get 'sucked
in'.
After going nuts with silicone around the indicator wire holes and fitting a seal on the bonnet, it has cured it! Could possibly be the same cause for
yours if there are unsealed openings from the bonnet into atmosphere. (This includes holes for the inspection plate covers).
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I get fuel smell for my work car coming from the front but the leaks are in the rear (leaking breather hoses and main filler hose, love todays
"improved fuel") the vacuum under the car pulls the fumes up and around the car and into the front windows when down.
sounds similar to that.
71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE |
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68AutoBug
A.k.a.: Lee Noonan
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| posted on February 12th, 2013 at 04:05 PM |
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| Quote: | Originally
posted by silver
check the seal under the fuel gauge sender
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well, I had My sender out to fix a couple of rusted holes in My tank..
I repaired from the nside and outside...
Now the seal for the sender does leak... even though I have tried permatex, which has helped except for very hot days...
when the fuel expands...
I tend Not to fill the tank right up.. lol
I'll just have to replace the seal...
and recheck all the breather hoses too...
I have lost one of the screw plastic seals too...??
where I had an earth wire...
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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empi
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| posted on February 13th, 2013 at 08:29 AM |
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check sender seal, cap seal and breather pipe near the cap is attached.
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