BenzWorld Junior Member
Date registered: Jul 2007
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
diesel fuel 'hard' lines- correct replacement
Hi on my 1975 240d, in replacing the old style hand primer pump with the newer style- I disconnected the fitting/line that comes from the main fuel filter and goes to a fitting near the hand primer pump to gain access to switch the hand primer pumps. In doing so, the hard plastic fuel supply line going to the fitting snapped- not surprising as its 30 years old. There are several of these low pressure fuel lines that are a very hard, once probably clear, plastic like material that get pushed on 'barbed' fittings without hose clamps. My question is- do you have to replace these plastic like lines with exactly the same material, or can you just use rubber type fuel line that is diesel fuel compatible. Does anyone know what the internal diameter of this stuff is? I stopped in at my local MB dealer to ask about it- he said its 8mm inside diameter and said go to NAPA- NAPA says they don't carry any metric hose- but for sure its smaller than 8mm anyway.
Lastly, if alternate style rubber hose is ok, do you want to/should you add a hose clamp where the lines go onto the barbed fitting ends? Thanks!