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Draining E31 fuel tank

Printed From: BMW Car Club Forum
Category: Cars & Registers
Forum Name: 8-series
Forum Description: Discussion forum for the 8-series
URL: https://www.bmwccgbforum.co.uk/forum_posts.asp?TID=16176
Printed Date: 28 Mar 2024 at 8:06pm
Software Version: Web Wiz Forums 12.03 - http://www.webwizforums.com


Topic: Draining E31 fuel tank
Posted By: alan.sockett@btinter
Subject: Draining E31 fuel tank
Date Posted: 08 Aug 2021 at 9:07am
My car has been in storage for 8 years, unfortunately I left it with fuel tank half-full. 
I have tried to siphon fuel out via the filler neck but even with 42in of tube in the tank I have not reached any petrol. 
Suggestions of any method for draining the tank of the waste petrol would be appreciated. 
Many thanks 
Alan




Replies:
Posted By: Mike Fishwick
Date Posted: 08 Aug 2021 at 3:37pm
Assuming that the engine cranks but does not start (a miracle after 8 years!) remove the plugs and make sure they are clean and dry.

You could try extending the fuel supply pipe into a tin, and hot wiring the fuel pump.  When the tank is down to about a quarter full, fill it up with a decent four-star fuel.  If you then get problems with starting, and the plugs are getting wet, dry them off with a blowtorch and feed some butane gas from the torch into the air intake while cranking - this always works well on lawnmowers etc!


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A Z3 is not just for Christmas - it's for life!


Posted By: alan.sockett@btinter
Date Posted: 09 Aug 2021 at 9:07am
Hi Mike, thanks for the quick response, your suggestions are very helpful. However I am not familiar with the location of the components, also I doubt that I would be able to access them. 
Therefore I think I will enlist the help of my local independent BMW garage. Thanks again for your help. Best regards Alan. 



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