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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: woodgeek on February 04, 2018, 03:28:28 PM

Title: How clean does a fuel tank need to be?
Post by: woodgeek on February 04, 2018, 03:28:28 PM
My fuel tank sat overnight with a 50/50 mixture of water and Oil Eater. It’s looking much better. How clean am I trying to get it?
(https://uploads.tapatalk-cdn.com/20180204/b8afa7d45936d0a1d9a6e753f36fa24c.jpg) (https://uploads.tapatalk-cdn.com/20180204/80ddc33b11d3e46cc8e306745d5e03b6.jpg) (https://uploads.tapatalk-cdn.com/20180204/6049917e8777bb573f0d46d111b47937.jpg)


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Title: Re: How clean does a fuel tank need to be?
Post by: The Mighty Gryphon on February 04, 2018, 04:26:15 PM
I like the inside of my tanks to be spotless.  After all, it's holding fuel that needs to go through some very small holes at the injectors. 

Some of the inmates have had success with a white vinegar soak for a couple of days to really get things nice and shiny in there.
Title: Re: How clean does a fuel tank need to be?
Post by: woodgeek on February 04, 2018, 04:37:37 PM
That is very true. Good points about cleanliness.

Do the newer hoses and vibration damper dissolve like the older ones?

Do you recommend the BMW hoses or an alternative?


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Title: Re: How clean does a fuel tank need to be?
Post by: The Mighty Gryphon on February 04, 2018, 05:05:04 PM
Whenever posssible I avoid purchasing BMW rubber as it's horribly overpriced.  I use NAPA fuel hose, but can't remember the SAE spec off the top of my head.  I just ask for the stuff that can be immersed in fuel in a tank.
Title: Re: How clean does a fuel tank need to be?
Post by: woodgeek on February 05, 2018, 01:20:27 AM
Have you heard anything good or bad about the flexible nylon hose kit from beemer boneyard? (https://uploads.tapatalk-cdn.com/20180205/83b8c0b49d0e39024d9b0c5115317461.jpg)
Title: Re: How clean does a fuel tank need to be?
Post by: billday on February 07, 2018, 09:00:03 PM
Quote from: woodgeek on February 05, 2018, 01:20:27 AM
Have you heard anything good or bad about the flexible nylon hose kit from beemer boneyard?

I installed these last winter. I couldn't figure out a way to install them that didn't leave the fuel filter rubbing shoulders with the (inside) top of the tank, and I'm not crazy about the idea of normal vibration causing the filter to rattle against the inside of the tank.

That said, they didn't cause any problem all season. Also, the guys at Beemer Boneyard are great and I trust them implicitly. So after all my grousing, I guess I have to say that this hose kit is just fine.
Title: Re: How clean does a fuel tank need to be?
Post by: The Mighty Gryphon on February 08, 2018, 09:30:25 AM
I got a couple sets of those nylon lines when I bought my bikes.  Previous owners didn't use them, and I haven't either.  I do carry them as part of my touring spares with a spare fuel filter. 

I'm a little leery of the ability of the nylon to form a good seal around hose barbs.  It isn't one of the more flexible plastic resins.
Title: How clean does a fuel tank need to be?
Post by: woodgeek on February 09, 2018, 01:17:21 AM
A few dirty recesses left ...
(https://uploads.tapatalk-cdn.com/20180209/207f6c9bb85e8d1b58eede3ec0666cfe.jpg)
(https://uploads.tapatalk-cdn.com/20180209/46eb35cb40a2a3af8c1d74910950a83a.jpg)
(https://uploads.tapatalk-cdn.com/20180209/29d80804c1235fba0a4b9aadabca6c5a.jpg)
Title: Re: How clean does a fuel tank need to be?
Post by: Laitch on February 09, 2018, 12:09:23 PM
Keep cleaning but don't be gouging around down there with metal objects like screwdrivers and chisels. :yes
Title: Re: How clean does a fuel tank need to be?
Post by: Panchoplanet on February 18, 2018, 10:27:39 PM
It should be clean enough for you to pour your favorite beer inside the tank and drinking it without reservations as to it's cleanliness .
It has to be that clean for your fuel system.


Pp. :lets-eat:
Title: Re: How clean does a fuel tank need to be?
Post by: The Mighty Gryphon on February 19, 2018, 08:08:51 AM
Quote from: Panchoplanet on February 18, 2018, 10:27:39 PM
It should be clean enough for you to pour your favorite beer inside the tank and drinking it without reservations as to it's cleanliness .
It has to be that clean for your fuel system.


Pp. :lets-eat:

Well put!