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7 Series - E38 (1995 - 2001)

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  #1  
Old 11-19-2012, 11:36 AM
97bmr 97bmr is offline
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Location: Olathe
 
Join Date: Nov 2012
Posts: 1
Mein Auto: 1997bmw
740i Fuel tank imploded.

The fuel tank on my 1997 740i has been building up great amounts of pressure. It is almost impossible to get the gas cap off and then when it does come off there is a huge "whoosh" sound from pressure release. My mechanic said to get a new ventilated fuel cap but problem remained. My fuel tank on the drivers side has actually imploded and is sitting in my garage leaking gas. This problem is also causing the fuel to stop flowing when I get down to 1/4 tank. BMW says there is no recall on this issue. Seems like a dangerous situation to me.
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  #2  
Old 11-19-2012, 06:36 PM
Sobek Sobek is offline
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Location: Queensland, Australia
 
Join Date: Jun 2012
Posts: 25
Mein Auto: 1996 BMW 730iL
Yeah pretty common thing it seems. It's generally related to the charcoal canister, which was actually redesigned on 3/97 and later models to try and avoid this particular issue. What specific month model is your car? It's possible yours was built just prior to this change coming into effect (remember there's a difference between the PRODUCTION date and build date - my car is a 1996 build but production was in 95 for my motor, if I've got that right).

Have a read here, it's a well known issue;

http://www.e38.org/SI.New.Evaporativ...Purge.Line.pdf

No recalls issued by BMW that I'm aware of!
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  #3  
Old 11-19-2012, 11:53 PM
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BMWFatherFigure BMWFatherFigure is offline
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Location: Perth, Western Australia
 
Join Date: Aug 2012
Posts: 2,324
Mein Auto: E23;E30;E38;E32;E34 +
Mine is going the same way - stealer quoted $300 for change over. BTW the cap is not vented - unless you drill it.
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  #4  
Old 11-20-2012, 04:20 AM
mgoods50 mgoods50 is offline
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Location: Nashvegas
 
Join Date: Nov 2012
Posts: 74
Mein Auto: E36 M3
'97 - can't drill since OBDII if I'm not mistaken-- the goods have already been posted. Good luck.
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  #5  
Old 11-21-2012, 03:16 AM
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BMWFatherFigure BMWFatherFigure is offline
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Location: Perth, Western Australia
 
Join Date: Aug 2012
Posts: 2,324
Mein Auto: E23;E30;E38;E32;E34 +
Our Ausi spec cars wouldn't know or be able to tell if a cap was drilled - sorry about the mis-info.
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Good - Fast - Cheap: Pick any two.
Current:
E23 735i; E32 735iL (X 2 - 1 Alpine White and 1 Glacier Blue); E34 535i; E38 735iL; R50 Cooper; R55 Cooper Clubman.
Previous:
E21 318i; E30 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i
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  #6  
Old 11-22-2012, 05:20 AM
chrisn7 chrisn7 is offline
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Location: Huddersfield, West Yorks
 
Join Date: Oct 2011
Posts: 521
Mein Auto: 750iL
Yep we drill the cap in the UK too as no one has found the solution to this. Some have changed the charcoal cannister with no effect..
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