Changing fuel filters - Ford Powerstroke Diesel Forum
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Old 03-24-2011, 01:27 PM
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Changing fuel filters

I'm going to try and change these myself this weekend does it matter which one you do first? how many times do you need to turn the key on and off to prime?

Thanks
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Old 03-24-2011, 02:48 PM
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wait til you have under 1/4 tank left.
loosen the top one first. Set your oil change pan under the lower one. open the water seperator and let er drain all the way. then go about doing the lower one with whatever extension combination works.

prime the system by cycling on for 30 seconds and off- 6x
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Old 03-24-2011, 03:21 PM
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you'll get a good diesel bath. I did mine the other night. 3 quarts drained out and I couldn't wait anymore and made a big mess. It drained a good 15 minutes when I lost patience
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Old 03-24-2011, 03:28 PM
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Just did mine last weekend...doesn't matter which is done first. And the diesel tech at the local dealership told me he only primes the system once for 30 seconds, so that's what I did and have had no problems. Oh, and make sure you have a 36mm socket!
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Old 03-24-2011, 04:53 PM
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Sounds like im gonna get messy! ill let you guys know how it goes.
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Old 03-24-2011, 05:09 PM
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Just remember...use a clean drain pan so you can save the fuel that drains out of the separator. Diesel is getting expensive.
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Old 03-24-2011, 07:18 PM
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I found after changing the filters several times, it is better to open the top one first. Doing this will prevent it from siphoning out when you open the bottom drain.
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Old 03-24-2011, 08:08 PM
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one more thing; do it on a muggy night that you want to spend outdoors, you wont need any mosquito repellent... LOL
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Old 03-24-2011, 09:23 PM
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yeah you will smell like diesel fora few days. if you followthe process above the mess wont be bad. last time it took 20 minutes and only spilled two drops
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Old 03-24-2011, 10:39 PM
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I've always opened the water separator drain first, drop the lower one and replace it, then replace the upper filter at work.
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