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Unread 08-15-2015, 12:19 PM   #1
plunix
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2008 WK 
 
Join Date: Jan 2015
Location: Ajax, On
Posts: 115
CRD Fuel Filter

Do I have to put diesel in the fuel filter before installing it?

Can I just let the system fill it with diesel from the tank somehow?

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2008 Jeep Grand Cherokee CRD
GDE Hot Tune, DPF Delete, Turbo Res. Delete, Exhaust Res. Delete
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Unread 08-15-2015, 12:28 PM   #2
caddydaddy
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2007 WK 
 
Join Date: Dec 2013
Location: Gales Ferry, Connecticut
Posts: 753
No, I cycled the key a few times to fill it up. You can also hook a hose to the water drain valve in the center, and let it purge out the air into a bucket or jug.
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Unread 08-15-2015, 12:43 PM   #3
JT77
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2008 WK 
 
Join Date: Feb 2015
Location: Sudbury, Ontario
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When I change my fuel filter, I always pre fill the new one using the electric lift pump in the fuel tank. Once you're filter is completely installed, all you have to do is install a clear hose on the center nipple(bleed valve) of the fuel filter and the opposite end in a container to catch the fuel. You must leave the nipple loose (about 2 turns out from bottom). This will allow the air to be purged out of the filter. Turn the ignition on but do not start the engine. The pump will cycle and fill the filter. Once the filter is full of fuel it will flow through the clear hose and into you're container. When full, turn ignition off and tighten the nipple down. Start engine and check for leaks.
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Unread 08-15-2015, 02:16 PM   #4
ianrmz250
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Never needed to do any of that and i have changed my filter 8 times . Just fit filter and crank until it starts.
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Unread 08-15-2015, 08:17 PM   #5
zc911
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yup, just fill it and cycle the key.

PS don't break the water in fuel sensor or you'll be out $200
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Unread 08-15-2015, 10:18 PM   #6
Chirpz
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Quote:
Originally Posted by ianrmz250 View Post
Never needed to do any of that and i have changed my filter 8 times . Just fit filter and crank until it starts.
That is what I have always done too... It does take a little longer to start. Next time I'll try pre-filling.
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Chirpz
2007 WK 3.0L CRD, Quadradrive II, GDE EcoTune, DPF-Delete
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Unread 08-16-2015, 06:32 AM   #7
JT77
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Join Date: Feb 2015
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Posts: 27
If you don't purge the air out of the filter, it has to flow through the high pressure injection pump($$$), and then downstream from there. Over time that could be hard on the pump. Not too many pump failures reported on the forum but I try to maintain best practice.
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Unread 08-16-2015, 06:46 AM   #8
plunix
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2008 WK 
 
Join Date: Jan 2015
Location: Ajax, On
Posts: 115
Great tips guys. I ended up pre-filling it.

I literally solved ALL of my CRD problems by changing this fuel filter out. Low RPM vibrations, chugging, sluggish acceleration, rough downshifting.

I was also stalling out a few times a week. I'm HOPING that's the end of that problem as well. Time will tell.

This just goes to show how important a CRD fuel filter is. I have had the vehicle for 20,000km so far and I guess the fuel filter wasn't replaced for a while.

If anyone is still reading, what intervals do you change yours at?
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Unread 08-16-2015, 09:38 AM   #9
mushkasdad
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2008 WK 
 
Join Date: Nov 2014
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I will be changing mine out at 15,000 miles or so.
Surely overkill, old habit from 5.7,6.2,6.5 gm's
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Unread 08-16-2015, 04:09 PM   #10
ianrmz250
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Location: Hertfordshire England UK
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Once a year regardless of milage .
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