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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 07-30-2008, 05:06 PM   #1 (permalink)
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noobie query

I have just aquired a 1991 318i lux e30 and I am having a problem with the fuel tank filler hose. When the tank is half or more full the fuel leaks from the hose connection. This does not happen when the tank is a quarter ful. I have removed the hose and used Hylomar blue jointing compound and a new clip. The problem continues as soon as I put more fuel in the tank. The pressure does not seem to be rekieved when I remove the filler cap as I fond out yesterday when I removed the cap and then disconnected the hose and washed about 10 litres of fuel on the floor. Any suggestions would be really helpful.
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Old 07-31-2008, 10:38 AM   #2 (permalink)
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what about the breather hose, did u check that??
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Old 07-31-2008, 12:49 PM   #3 (permalink)
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Breather hose???

Can't seem to find the breather hose that you told me about. Looked in Haynes workshop manual as well. Told you I was a noobie to BMW's
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Old 07-31-2008, 03:09 PM   #4 (permalink)
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note the technical drawings... there are several places where your leak can occur.

Good luck.
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Old 07-31-2008, 04:23 PM   #5 (permalink)
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Thanx

Thanx for the diagram, I will check it out tomorrow. My leak is at the connection between the rubber fiiler hose and the tank inlet. It could be that after 17 years the hose needs replacing. I haven't spotted an expansion tank yet.
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