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Old 08-08-2011, 06:27 PM
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boneheaddoctor boneheaddoctor is offline
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Join Date: May 2004
Location: Hells half acre (Great Falls, Virginia)
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What happens when a tank vent gets clogged.

What happens when a tank vent gets clogged on a W123.


For anyone that doesn't think the lift pump on a OM617 can practically suck a golf ball through a garden hose....here are two pictures of my fuel tank when the vent became fully blocked for some reason on a 3,200 mile round trip.

Two points of note.....the car never experienced a power loss, and it ran 80-90 mph during all of this. Right up until the fuel gauge suddenly stopped functioning with the only symptoms of a reduced fill-up volume. I drove the car another 4 hours after it crushed down this small, at this point it could only hold 6 gallons of fuel at most.


I guess these pictures are sized too big so you have to click the thumbnails for a better look.
Attached Thumbnails
What happens when a tank vent gets clogged.-p7020791.jpg   What happens when a tank vent gets clogged.-p7020792.jpg  
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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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