Since changing both fuel filters a few weeks ago, my car has been leaking fuel, alot. I checked all the lines today, and everything looks fine. When I checked my fuel filters, BINGO (I think).

The secondary filter looks too big, I can see the outer edge of the seal, and the outer lip is full of Diesel! Am I smoking dope, or is this the wrong filter?

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

Clcik buy parts tab and check part numbers.

Photo is fuzzy, but looks like there may be wetness on the fuel line above the filter too. Did you replace the oring on the shaft of the bolt?

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

nope... THAT MUST BE IT. If I recall correctly, there's no O ring at all. Didn't know it existed, thanks.

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

it looks like the top of the housing is wet with diesel. Did you use a new copper washer or reuse the old?

if you have to reuse the old I would anneal it and then sand it down until its flat again. Maybe a light film of gasket material(and I mean a film).

copper o ring, huh? never saw it. Perhaps I forgot to put it on, or it was never there.

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

it would be aluminum if it has it. some have the aluminum ring and others have o-rings on the shaft of the bolt.

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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350

if its an 85 there is no washer, copper or otherwise. There are 2 rubber o-rings on the shaft. looks like the right filter to me.

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1996 E300 110,000
1985 300TD 212,000
1980 300D 238,000

when i got a filter it didnt come with the new o-ring, old one looked fine though and i just left it on.

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1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350

Its leaking around the bolt. Replace those crush washers, some use aluminum others use O rings.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

The king of fuel leaks has spoken.

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

I know that one well my friend. I faught a never ending battle with it during my two year ownership of the 300SD.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

i couldnt get the big one to seal either. it was from Advance. I got one at NAPA that was the same as the one I took off and it worked perfectly. I will buy some from here next time but the change was not a planned one so I had to buy local

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)

Tomorrow I'm doing fuel filters on the Buttercup. The 116 is easy, take off-put on. Its the 123 not the same? What will I need to look for? Thanks!

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Ginny in Denver-ish
78 300SD, 265K (mine)

I've purchased NAPA filters and they don't always come with the crush washers. I think I used an O-ring to prevent leaks on my 240D.

John

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Certified Registered Nurse Anesthetist (CRNA)
2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI

mine i put on the other day looks simular u can see the leading edge of the o-ring i'm thinking mine is bosch or mann one i forget but i've got a 82 and the crush alum. washer is heavily worn i had to put a thin layer of hylomar on it to get it to seal that's after new o-rings etc.. the kit came with a larger one i couldn't figure out where it went does anyone have pics of the 85 bolt that has the 2 o-rings?

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2004 Infiniti G35 3.5L 6mt Coupe 73K miles 25.6mpg ytd
2001 Green Audi TT 225 AWD Roadster 71K 6sp 30.9mpg >>STOLEN<<
1982 300D Turbo 231K 120hp? 28.1mpg YTD