Ever since the diesel was reformulated it eats and swells the rubber hoses on older diesel motors. Too much benzene I believe. I have an 85 MB and have been changing out the fuel lines every year or so for the past two years. I plan on switching them all over to viton hoses. It is the only hose that I know that will hold up. You can purchase it from one of the WVO conversion sites. 

Brion S.
S. Utah

  dear all pictures telling stories as we work

  This weekend i changed out the fuel filter on our 89 5 Speed Diesel -
  took some pictures of what went on -
  found out that even diesel pushers need to worry about hose failure -
  Technical comments welcome -
  -learning is the place where i live most