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  #1  
Old 08-18-2002, 11:35 PM
Alan S's Avatar
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Join Date: Dec 2000
Location: Cary, IL
Posts: 94
Primer pump/Fuel filter change

Silly question, is the hand pump the same as the primer pump I have in my car? I'm going to change fuel filters and want to make sure I do it right. Also, I would like to verify that I should keep the top hex nut cracked, then pump until no bubbles appear, then tighten hex? Thanks again

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2012 550CLS
1982 380SL
1985 300D
1998 ML-320
1997 E-320
1984 380SE

Last edited by Alan S; 08-18-2002 at 11:44 PM.
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  #2  
Old 08-18-2002, 11:51 PM
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Join Date: Aug 2001
Location: Evansville, Indiana
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You are correct. I would suggest filling the filter with either clean diesel fuel or Diesel Purge or some such -- it takes a LONG time to pump the filter full by hand, and if you don't get all the air out, it ends up in the IP. Big pain. Much faster to fill the filter first.

Peter
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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
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Old 08-20-2002, 01:21 AM
Alan S's Avatar
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Join Date: Dec 2000
Location: Cary, IL
Posts: 94
I ended up replacing both filters plus fuel lines to injectors. Whole project took less than an hour. What surprised me was that I only had to pump maybe 15 times to get air bubbles out. The car started fine and has run well all day. I was under the assumption that I would spend all day pumping, considering I just spun the filter on without filling it with diesel
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2012 550CLS
1982 380SL
1985 300D
1998 ML-320
1997 E-320
1984 380SE
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  #4  
Old 08-20-2002, 07:03 PM
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Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
Never argue when things work right!

I did at least 200 stroked on the 200D when I ran it out of fuel, still had to crank until the battery was nearly flat before it started!

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
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