It is what it is.

I've went through two copper washers trying to prevent fuel from seeping out. It's not much fuel, but a little diesel goes a long way and leaves an unsightly stain beneath the car.

Is there supposed to be an o-ring on the hold down bolt or something?

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1974 240D "Boldie" 170K.- New timing chain/freshly rebuilt IP/replaced valve seals/injectors/upgraded stereo/new Bilsteins with Yokohamas/fresh paint and rocker panels plus lots of welds.

The older fuel filter head has a common problem of not being able to seal effectively. The crush washer does seat properly because the rubber gasket of the filter does not allow it to do so. Too much flexing of the how assembly.

So the best way to fix this issue is to upgrade your filter head. 617 cars 1983 and newer came with an improved version in which there are now two O-rings on the bolt to replace the crush washer. This provided better sealing in conjuction with the filter's rubber gasket.

Photo of updated filter head with updated bolt. Courtesy of toomany MBZ.




.

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1983 123.133 California
- GreaseCar Veg System

Danka.

Is this part available new or do I have to call salvage yards?

Anyone got a spare?

I wonder if double washers or a small gasket would work?

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1974 240D "Boldie" 170K.- New timing chain/freshly rebuilt IP/replaced valve seals/injectors/upgraded stereo/new Bilsteins with Yokohamas/fresh paint and rocker panels plus lots of welds.

You need the casting in the picture? I have a 1984 300D that is going to the salvage yard tomorrow.

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Current:
1985 300D aka Miss Margaret
1991 300SE aka Alarice
1995 SL320 aka Samantha
1997 K1500 Silverado
Past:
1999 E300 ex-wife got it and let her son ruin it
1984 190 2.3 ex-wife got it and let her son destroy a great car
1985 300D (CA version) aka Maybelline lost to deer at high speed.
1981 300D aka Madeline (went to salvage at near 400k) rusty, yet best car I ever drove
Wishlist:
McFarlan TV6 (only a few privately owned)
ReVere with Rochester engine
1917 Premier (only one left)

I'm not sure, but I doubt it. I believe that mine only has a connection for the return line from the IP. This one seems to have that plus two others.

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1974 240D "Boldie" 170K.- New timing chain/freshly rebuilt IP/replaced valve seals/injectors/upgraded stereo/new Bilsteins with Yokohamas/fresh paint and rocker panels plus lots of welds.

Sounds like our vehicles have similar problems. Mine leaks in the same place. I tried a fiber washer from the hardware store of appropriate dimensions, which helped but didn't totally eliminate the problem. So I wouldn't recommend that solution. The correct part is the copper washer that you allude to (seal ring N 007603014100). I have ordered it and plan to intensive scrub the surfaces prior to installation. But I haven't received it yet, so I cannot say if a new washer solves the problem. Actually, EPC has two different filters, so yours may differ from mine (68 220D). Perhaps the correct part for you is N 007603016401. Good luck.

The pic above is from a 123, you may be able to make out the part number.

The attachment here shows the filter and seal ring for a 115.117 with a 616.916 engine.

Attached Thumbnails

 

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83 SD

84 CD

You know...

It didn't start leaking until I replaced the filter with one provided by the PO.

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1974 240D "Boldie" 170K.- New timing chain/freshly rebuilt IP/replaced valve seals/injectors/upgraded stereo/new Bilsteins with Yokohamas/fresh paint and rocker panels plus lots of welds.

The filters should be the same between the different housings if you are worried about that. The washer just didn't seat properly and is leaking. I have had the same issue on both of my cars with either the gaskets or washer failing.

I might need one. Could you PM me with the details? Thanks.

I'm sorry. I was thinking you have a w123. You have a w115. Totally different animal.

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1983 123.133 California
- GreaseCar Veg System

I'm having that problem on my 123. It's not seeping very much, but I'll have to fix it soon.

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Never be ashamed to ask for help.

1985 300D
1987 300SDL
1970 Jaguar E-Type OTS
2002 Dodge Intrepid (Traded In)
2011 Ford Crown Victoria

Use a Nu-Lip Aluminum washer with a bonded seal available at any Hydraulic spares store. It is a permanent fix for that problem and will seal perfectly even at finger tight. The 123 series is 18Ø but the 115 may be a different size.

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Beagle

I had the same issue of seepage on my 300 CD. I used a nylon washer instead of the copper crush washer. No leaking for 2 years.

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'88 300 sold
'83 300cd

on the 300, there is an o-ring on the bolt if it's pre 83, there is two o-rings on the bolt if it's 83 or newer... or if it's had an ...02 base installed.
this was news to me, and I was glad to hear it.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!