Pays to replace all the fuel hoses under the hood and under the tank
when you get another car, and every 5-10 years, depending on the quality
of the hose.
Dan Penoff via Mercedes wrote on 2/25/19 6:23 PM:
Oldest son texts me this afternoon: “Car is leaking fuel bad, only when
running. I’m going to pull it in the garage and have a look.”
Hmm. He’s had a fuel leak that we haven’t been able to pinpoint for a long
time, but it’s always been pretty small. He still gets between 30-40 mpg.
So I get home, change into my grubbies, and glove up. I look all over that
thing and I can’t find anything obvious. Start the car and fuel is pouring out
from between the injection pump and engine, but we can’t see into this area
from either above or below. I notice the supply hose from the filter assembly
seems really soft and spongy. I’m thinking it’s got a crack in it, but we can
only see to the fuel heater, which on the OM6076 is in a weird place on the
head under the intake manifold runners for cylinders one and two. You can’t see
a darned thing.
I call my dealer and ask my parts gal about the availability of fuel heater.
“None in the country, nearly 300 in Germany.”
That’s a tell, a really big one. It told me that these things never get
replaced or there would be some inventory in the US parts depots. Hmm.
Off comes the crossover pipe. Can’t see any better. Off comes the intake
manifold.
The spongy hose? It had been connected to the banjo fitting on the side of the
injection pump, but was barely hanging on. It was bent into a 90 degree elbow
with no slack at the turn, and the banjo fitting was pointing down. There was a
clamp on the hose but it was run down so tight that it was bottomed out.
I broke the banjo fitting loose a bit and rotated it around so we could get at
the clamp. The hose was torn where it was bent into a 90. Great. To add to the
fun, it was clearly not diesel rated hose, and had broken down badly. I wonder
how much schmutz from the inside of the hose got into the engine…
Anyway, we got the clamp and hose off, replaced it with the proper stuff and
new clamps, put everything back together and that was it. Total time maybe 90
minutes if that. As an added bonus, we were able to take advantage of taking
things apart and get the plastic cover that Karl was so kind to sell me
installed. Nice.
The cars must communicate, as my wagon failed its water pump on Sunday. Despite
the rash of issues, the finnie ran flawlessly to and from work today. Old
Faithful, no doubt.
-D
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