What to do if the fuel tank drain hole of Audi A6 is blocked?
1 Answers
Open the outlet valve or faucet at the bottom of the fuel tank to let all the water flow out. The outlet valve or faucet is usually located above the bottom of the fuel tank, so after draining, some residual water needs to be removed from the tank. Scrub the inside of the fuel tank with a stiff brush or abrasive sponge. When applying force to the brush or sponge, move your arm horizontally left and right. Professional handling is required. It is best to spray with a hose onto the inner wall to ensure reaching all corners.