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im gonna change my fuel filter and just wondering if i have to open the water separater first before i start or just remove and reinstall and i am on my way?
It's a good idea to drain the water separator while you're changing the fuel filter. Quite often, opening the drain will require you to crack open the filter housing to get the drain flowing anyway.
I have found that if you try to put the new dry fuel filter in with the bowl full of fuel, the new filter will displace the fuel and then you have a mess to clean up. Better to drain and install the new filter when empty.
it all depends on how much time you have. all suggestions here will work. I am always in a hurry that i just let the fuel pull the filter in and then i dont have a mess. i do drain if i see water and or dirt in the bowl
All the junk that's behind the filter that isn't trapped will mix with the filtered fuel. First time you fire her up, guess were it goes? It doesnt' take that long. Injectors ain't cheap!