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Any time I change my fuel filter I like to completely drain the fuel bowl. You also might want to install a piece of tubing (5/16" I think) to catch the fuel and water coming out of the fuel bowl. Anyway, here's the procedure I follow:
1. Open the drain valve on the fuel bowl
2. Open the lid on the fuel bowl and remove the cap and old filter
3. After the bowl fully drains close the drain valve and fill it about 1/2 way up with fuel additive (I use Standyne lubricity formula for this)
4. Attach the new o-ring to the lid and coat with fresh diesel fuel (make sure you follow the direcitons for the ring so that the beveled edge is in the correct direction)
5. Attach the new fuel filter to the lid
6. Install the filter/lid back into the fuel bowl
7. Turn the key and wait to start (gives the fuel bowl a chance to comletely fill up)
is the fuel additive necessary?....i've heard some people say it can do more harm than good. could i just fill the bowl halfway up with fuel alone?
thx