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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, May-06-2019, 03:18:39 PM   #1
UFoh
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Default Bad fuel leak when gas pump tops off!

Hey guys. I get a really bad fuel leak when topping off the gas. Does anyone have any idea what it could be? I took the right rear tire off and the plastic guards and I don't see any obvious leaks. I'm going to go get gas and get my friend to fill it up while I stand under it, but I figured I would ask if y'all have any specific ideas on where I should be looking? In my head I was gonna see obvious wet spots but I don't.

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Old Mon, May-06-2019, 04:46:48 PM   #2
Pnick
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Default Re: Bad fuel leak when gas pump tops off!

One area besides the top of the gas tank/fuel tank mating surface is the formed hose from filler pipe to tank connection union.
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Old Tue, May-07-2019, 04:45:37 AM   #3
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Default Re: Bad fuel leak when gas pump tops off!

Hey, thanks a bunch for your reply Pnick. I looked where you told me to and there it was. I called jb weld and they told me to use jb plastic bonder. I applied it with a small paintbrush and it seems to have totally fixed my leak. I probably wouldn't have spotted it without ya
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Old Tue, May-07-2019, 05:41:11 PM   #4
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Default Re: Bad fuel leak when gas pump tops off!

Glad I was able to help...I won't trust that JB stuff on fuel hose though...I'd figure out a way to replace it if I were you...Fire is not something you want happening..
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Old Tue, May-07-2019, 05:43:55 PM   #5
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Default Re: Bad fuel leak when gas pump tops off!

Quote:
Originally Posted by Pnick View Post
Glad I was able to help...I won't trust that JB stuff on fuel hose though...I'd figure out a way to replace it if I were you...Fire is not something you want happening..
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Old Tue, May-07-2019, 05:52:22 PM   #6
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Default Re: Bad fuel leak when gas pump tops off!

I wouldn't ever top off any car, and I wouldn't trust JB weld when a fuel leak is the result if it goes south.
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Discussing Bad fuel leak when gas pump tops off! in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)