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#1
10-04-2010, 04:45 PM
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Why Different Amounts of Air in Primary Fuel Filters?
I suppose the only downside to owning two (almost) identical cars is that I notice every difference, so I start wondering...
In one car (91 300D), the amount of air in the primary fuel filter is negligible....maybe a half inch if the filter were turned vertically. In the other car (92 300D), I would say the amount of air is about 1/3 the volume of the filter. Both cars fun flawlessly. Why the difference in the size of the air pockets? I guess this is how I amuse myself when both cars are working perfectly! 
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife 
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#2
10-04-2010, 05:58 PM
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What was the fuel tank level in each vehicle at the time of the observation?
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#3
10-04-2010, 06:04 PM
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Quote:
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife
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#4
10-04-2010, 06:15 PM
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Quote:
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#5
10-04-2010, 06:17 PM
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Quote:
__________________
14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife
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#6
10-04-2010, 06:29 PM
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Quote:
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#7
10-04-2010, 06:50 PM
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Quote:
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#8
10-04-2010, 07:20 PM
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Quote:
Curious... Mine always has a small bubble in it and it is always around the same size. I'm so anal about it that I mark the side of the filter with a sharpie (along with the date and mileage), so I can see if the bubble size ever changes... But it never does in mine.
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AJ 1985 300D (SOLD) 
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#9
10-04-2010, 08:34 PM
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Mine had about half
Mine was about half air and it was throbbing at idle. I back blew the fuel hose and it stays completely full now.
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1983 300 SD. 157K. 1964 Studebaker GT Hawk 1972 Corvette, Bought new 2007 Toyota Tundra 2007 Toyota 4 Runner 1993 Toyota Sequoia Press 1 to continue in English, Press 2 to disconnect and call back when you learn to speak English.
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