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#1
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Question about fuel bleeding...
I'm a newbie to the diesel Benz world and just installed new fuel filters yesterday. Then I bled the fuel system using the hand pump on the engine. I'm not sure I did this right.
I loosened the nut atop the spin-on fuel filter and pumped until the bubbles seemed to stop coming out below the nut. But I kept seeing air in the clear fuel line that runs from the IP to the spin-on filter. Also, the hand pump was making a whistling or squeeking sound that led me to believe maybe the hand pump is bad. There was also an air bubble that I couldn't get out of the clamp-on prefilter. Is all of this normal, or did I do something wrong? Thx in advance everybody! ![]()
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'81 300TD turbo <<sold 12/05 to another diesel nut |
#2
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Did your engine start and run ?
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#3
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The air bubble in the prefilter is normal, and as I understand it, squeaking in the hand pump is a sign that you've got things pressurized and are moving fluid.
If it runs, then you're good to go!
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1983 300td 240k (down with bad tranny) 1984 300d 222k (daily driver) "Olive" 1997 GMC K2500 105k (sled dog limo) "The scenery in ANWR is as spectacular as the Grand Canyon and the wildlife is more impressive." |
#4
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With a return fuel line a little air in the lines really isn't a problem. I just replumbed my system and added a switch valve for running on WVO. Didn't bleed anything despite having a little air in the diesel line. I then added oil to my 2nd tank.. and literally sucked the oil from the trunk and filled my Racor filter without bleeding. That said I only had the oil tank switched on for about 20 second intervals till I had cleared the air from the lines. The engine didn't sputter at all.
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'84 300CD Turbo 132k (Anthracite Grey) - WVO - My daily driver - Recently named coo-coo-coupe by my daughter. '84 300D Turbo 240k (Anthracite Grey) - Garage Queen '83 300D Turbo 220k (Orient Red) - WVO - Wifes daily driver I'm not a certified mechanic, but I did stay at a HolidayInn Express last night. |
#5
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Yes! She started and ran fine after the filter swap and bleeding. So it sounds like I'm good to go...?
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'81 300TD turbo <<sold 12/05 to another diesel nut |
#6
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Yes, no matter what you did..... if it starts and runs all is well.
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