So I purged the air from my fuel filter today. I got air the first 3 times I opened the bleeder. On the fourth diesel came out and I did it one last time just to be sure I got all the air out. From what you guys have seen is this alot or a little of air.

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2006 Jeep Liberty CRD Limited
1983 Mercedes Benz 240D

I'd put that in the middle, closer to a little bit of air. I've had to open the bleeder 6 or 8 times back when I had a major leak at the heater connection. It takes a lot of air before it makes it out the discharge of the filter. There is a solid wall aluminum tube running down the middle of the filter that is the discharge. The bottom of the tube where the exiting fuel enters the tube is about 2.5 inches off the bottom of the filter - right in the area where the diameter changes. The air has to be down that far before it can make it out the discharge. Seems to me like they expected to have a lot of air in the system. I basically purge air when I check the oil now. Usually about two openings of the bleeder.

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Matt B.

05 Limited CRD. Bought it new. 112k on the clock now.

GDE Eco-tune, rear differential drain plug (drilled and tapped the pumpkin), transmission pan drain plug, Fumoto oil valve, fuel filler neck restriction removed, front hitch, Hayden fan clutch, Sears P1 battery since 08, Mobil 1 5w40, 5 volt glow plugs, DIY timing belt at 109k