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Old 07-09-2013, 08:09 PM
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How to clean a gas tank on a BMW parked 2 years

What is best way to clean a gas tank?

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Old 07-09-2013, 08:14 PM
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first drain the tank, then drop it. clean and flush it. then use this.

Gas Tank - Under Car Coatings - Paints & Coatings
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Old 07-09-2013, 08:19 PM
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Older Beemers had drain plugs in the tank. I would just drain it, put in some fresh gas, like 3-4 gallons, and a can of seafoam , and see if she runs. Keep it simple.
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Old 07-09-2013, 09:50 PM
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it is a bmw i would not chance crap getting in. no year was given. and sitting 2 years means ethanol is in the lines and affecting all the rubber parts. and should be changed .
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Old 07-10-2013, 06:02 PM
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I agree ratrod. The ethanol could be the silent killer here. It doesnt play well with older seal materials in the fuel system.
I thought it was worth the mention to start the easier way in case there are some serious issues with the whole system the OP wouldnt waste a bunch of time and money.
The filter will catch anything before it, but there could be a ton of issues after the filter due to the ethanol, and just fuel degradation as well.
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Old 07-10-2013, 06:06 PM
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hey i am right their with you. i would go simple too. just would like to give all the options . i would clean and replace all that has to do with old stale fuel.
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Old 07-10-2013, 06:20 PM
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Its a tough fix when good fuel goes bad. It just isnt a good scenario.
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Old 07-10-2013, 06:42 PM
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If I could afford a Beemer (which I cant), I could afford the premium fuel without the ethonol. Trouble is, I cant afford that either....

I would just replace the gas and see how it goes from there.
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