Hi, saw a pic of a forum member's car with fuel filters installed inline on vaccum lines in engine compartment -seems like a good idea as you would notice a failing vacuum pump quickly by noting oil in fuel filter yes? How many members are doing this? Smart!

I've seen it done on MANY cars I service, and plenty on here as well. it's a cool little trick.

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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!

Is that what the straight fuel filter attached to vacuum lines in my engine is? Weird. Was wondering about that.

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1985 300D (CA, 173K)

Dynamite Biodiesel Co-op, Phoenix,AZ

Cool trick!

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I choose to be happy, even when the Mercedes is being awkward, lol

Have them on all of ours. Have caught a shutoff valve failure on two of them so far.

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

I can't speak for your vehicle but in mine the filter is in front of the battery and appears to be on a vent line.

Here is a thread I started showing how I installed some on my engine.

Vacuum Line Filter


Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Thanks Charlie -I'm sold, nothing wrong with a "canary in a coal mine" Sorry peta people, just say'n! Cheap insurance and the filters are dirt cheap!

Mine is on the opposite side, I'll take some pics tomorrow

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1985 300D (CA, 173K)

Dynamite Biodiesel Co-op, Phoenix,AZ

Hmmmm.... Somehow I missed that thread.

Nice polish job on the oil filter housing Charlie!!

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AJ

1985 300D (SOLD)

There is one on the passenger side on a vent line not at the end of the line. If you add one you want to place it in front of the vac pump, it sucks towards it. Think of the hose as a straw with the vac pump being the mouth. (That sentence reminds me of a joke concerning a 50 foot garden hose and a golf ball.) ,) I digress. I put one on my 602 just in front of the pump. So far so good.

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92 300D 2.5L OM602 OBK #59

There is merit in this. I have often been concerned about the air flowing through the vac system. Over here my cars spend much of their life on dusty dirt roads. The old 300D (now parts car) had its vac pump discharge going into the air cleaner. Though I never found any dust in it, I was always concerned about it given how much dust there was accumulated every place on the car.
My newer 300D & the 2.5 both have internal ventilation of the vac pump, so unfiltered air goes into the crankcase. While I have never seen a build up of dust or oily mud, it does concern me. Maybe I will place a filter on the main vac line just before the vac pump & on the small line that also comes out of the pump.

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

I have two on each of my cars, seems like a good idea.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

Specifically, which lines would you put them on??

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2012 Mercedes ML350 Bluetec 91K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 231K (mine)
1998 Volvo S70 T5 Turbo 196K (kids)
1994 Ford F150 4WD 249K (firewood hauler)
1983 Mercedes 300D 376K (diesel commuter)

so direction of the fuel filters is important too -follow the arrows that show flow direction on the outer casing of the fuel filter