[Vwdiesel] Bubbles in the fuel line

[Bradley Flubacher]

If you've recently replaced the fuel filter, or removed fuel lines, I
would first start by making sure everything is tight. I've put in new
engines and had to tighten up the fittings a bit to stop air bubbles..

Brad


Ethan Vos wrote:

>Thanks to all who responded to my fuel filter question.
>
>I am getting bubbles in the fuel line. I have always heard that this is
>a result of a leak in the line somewhere. Is it normal for the return
>line to have bubbles?
>
>Where is the most likely spot for the leak to be? I can see most of the
>line except where it goes through the sub frame under the passenger
>seat.
>
>Is it possible that a restriction in the line could cause bubbles from
>the pump trying to pull a vacuum?
>
>Will I cause any damage blowing compressed air through the line from the
>fuel filter back to the tank?
>
>Under the tank on the passenger side is what looks like a box with a
>round thingy that can be turned. It looks like the fuel lines run in
>this. What is under there?
>
>Thanks.
>
>Ethan
>
>
>
>
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