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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 09-20-2006, 02:15 PM
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ChileBeem ChileBeem is offline
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Fill up my tank => puddle of gas on floor!!!

Hey guys: ideas please before I rip the whole tank out.

I have noticed a light gas smell after long drives, but no wet patches on floor or tank bottom. I fill up (feeling rich!) on Friday, and the guy really fills the tank several clicks past the first pump click (I know, but was too late). There is a splash and gas, about 1/8 gal. I guess, falls very fast to floor. Looks like from front upper of tank.

Any ideas?

Thanks...
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  #2  
Old 09-20-2006, 02:40 PM
BillP BillP is offline
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Quote:
Originally Posted by ChileBeem View Post
Hey guys: ideas please before I rip the whole tank out.

I have noticed a light gas smell after long drives, but no wet patches on floor or tank bottom. I fill up (feeling rich!) on Friday, and the guy really fills the tank several clicks past the first pump click (I know, but was too late). There is a splash and gas, about 1/8 gal. I guess, falls very fast to floor. Looks like from front upper of tank.

Any ideas?

Thanks...
Define "floor" - if you mean "ground", that is normal, though your gas station attendant is an idiot. Where else do you want excess fuel to go? There is a spill pipe that runs along the back of the rear right tire.

If by "floor" you mean the interior of the car, that is bizarre and probably dangerous.


Bill
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  #3  
Old 09-20-2006, 02:56 PM
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ChileBeem ChileBeem is offline
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ok, sorry Bill.

On the concrete gas station floor. The spill ran down the tank to ground. If there was a overfill from filling process, would it not end up at gas station attedants feet? ie right side, rather than left?

Thanks for advice!
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2002 540ia MSport Euro
Factory fitted goodies:
Titanium Silver, Blk interior/headliner
MSport option 337, body, seats, s.wheel, shadowline, trim
MSport op. 705, st II suspension
MSport op. 204, 3.15 dif/ high stall tq converter
Premium Sound with DSP + Sub
Type 66 wheels 245f 265b
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  #4  
Old 09-20-2006, 05:30 PM
BillP BillP is offline
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It is possible that the overflow pipe/tube isn't extending through the wheel liner and is then causing the fuel to run along the bottom of the car before it finally hits the ground. Get under the car and look.


Bill
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'00 540iA/Sport, Anthracite/Black - Euro Delivery in Spring 2000
'06 Honda S2000, Black/Black (my go-kart) - GONE
'03 Z4 3.0 6-speed/Sport, Sterling Gray/Black - GONE
'71 2002 Green/Black - GONE
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  #5  
Old 09-20-2006, 07:24 PM
BMWtech75 BMWtech75 is offline
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Quote:
Originally Posted by ChileBeem View Post
Hey guys: ideas please before I rip the whole tank out.

I have noticed a light gas smell after long drives, but no wet patches on floor or tank bottom. I fill up (feeling rich!) on Friday, and the guy really fills the tank several clicks past the first pump click (I know, but was too late). There is a splash and gas, about 1/8 gal. I guess, falls very fast to floor. Looks like from front upper of tank.

Any ideas?

Thanks...

Remove your rear seat bottom and insulation then take a look to see if the area of the sending unit is wet. If so, possibly a bad gasket.
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  #6  
Old 09-20-2006, 07:43 PM
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Redshift Redshift is offline
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Had this problem with my track car. The side-to-side vent tube was not properly seated and had to be fixed. It's not a pressurized line, so not immediate harm/danger, but should be inspected anyway. The way to check it is to remove your rear seat bottom, pull back the carpet and sound deadening material, and remove the round gas tank access panel.
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  #7  
Old 09-21-2006, 07:01 AM
KTrostel KTrostel is offline
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Originally Posted by BMWtech75 View Post
Remove your rear seat bottom and insulation then take a look to see if the area of the sending unit is wet. If so, possibly a bad gasket.
I had the same problem. Car had a faint smell of gas and would drip fuel onto the ground after a full fill up. Realigned the sending unit gasket and the problem went away. As BMWtech said, it is quite easy to check.
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  #8  
Old 04-20-2012, 11:01 AM
SamReyes91 SamReyes91 is offline
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bump any ne info on this??
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  #9  
Old 04-20-2012, 12:53 PM
JimLev JimLev is offline
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It's possible the top of the connecting hose to the tank behind the wheel well liner has a split in it, or one of the clamps is loose.
Maybe the fuel ran down the liner toward the rear of the car.
If your really want to know you will need to pull the wheel and liner, put the wheel back on, go to the gas station and fill'er up.
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  #10  
Old 04-21-2012, 06:00 PM
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gtxragtop gtxragtop is offline
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Originally Posted by JimLev View Post
It's possible the top of the connecting hose to the tank behind the wheel well liner has a split in it, or one of the clamps is loose.
Maybe the fuel ran down the liner toward the rear of the car.
If your really want to know you will need to pull the wheel and liner, put the wheel back on, go to the gas station and fill'er up.
+1 Mine seems to be seeping from this hose. I get a faint smell only, nothing on the ground. Pulled wheel liner (which is a pain) and could see that there was brownish stains around the area where the rubber hose clamps to the tubes from filler and down to tank. I tightened the clamps figuring... All set now. Well, better but not fixed. This started late last year.
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  #11  
Old 09-30-2012, 05:05 PM
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gtxragtop gtxragtop is offline
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Originally Posted by gtxragtop View Post
+1 Mine seems to be seeping from this hose. I get a faint smell only, nothing on the ground. Pulled wheel liner (which is a pain) and could see that there was brownish stains around the area where the rubber hose clamps to the tubes from filler and down to tank. I tightened the clamps figuring... All set now. Well, better but not fixed. This started late last year.
Found the problem. Removed rear seat and fuel pump access cover. First thing I see is a mouse nest loaded with grass other debris and acorns. The area was wet with gas. It turns out the lovely mice chewed on the small black line which I assume is the vent line. The chewing left a pinhole that peed fuel when I filled the tank. I cut out the bad section and used 1/4" fuel line with fuel line hose clamps and problem is solved. I hate mice
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  #12  
Old 10-03-2012, 07:06 AM
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bluebee bluebee is offline
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Quote:
Originally Posted by gtxragtop View Post
the lovely mice chewed on the small black line which I assume is the vent line. The chewing left a pinhole that peed fuel when I filled the tank.
The cute mice have given us a nice update for this thread:
- Does spilled gasoline go into the charcoal canister (1)
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Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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  #13  
Old 10-03-2012, 08:56 AM
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Fudman Fudman is offline
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I hate mice
I hate those meeses to pieces!
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