Quote:
|
Originally Posted by Rebe
I am wanting to change the fuel lines where there is rubber before starting on biodiesel. Can you possibly shed some light on which ones to change, and where to get the synthetic hoses at? Also, if the hose ends are changed do I have to reprime the engine?
|
There is no need to change fuel hoses when using biodiesel!
LSD & ULSD also cause deterioration of the fuel hoses, but no-one is recommending that everyone change the fuel hoses on every diesel in the country.
Checks of fuel hose condition is part of good preventative maintenance. Look for moist looking fuel hoses, replace any hoses which are suspect and keep a supply of the 2 sizes used on your vehicle available for this purpose.
Biodiesel (& vegetable oil, mineral oil and diesel fuel) does degrade NATURAL rubber. Fortunately vehicle manufacturersw do not use NATURAL rubber in fuel hoses. They use NITRILE rubber, which is RESISTANT to deterioration by these substances.
The MB fuel filler neck sealing ring to the body, is NATURAL rubber and I need to replace this item on our 2 MB300Ds, - deterioration due to spilled fuel.
If you need to replace any fuel hose on the fuel delivery side, priming the fuel system is advisable, although you can get away without priming, if the fuel tank is low and the time taken is short (fuel does not have time to drain back to the tank), or if the vehicle fuel tank is near full (fuel tends to leak from removed hose).
Hoses replaced on the Return side, do not require priming of the fuel system.
Remember that biodiesel will clean the gunk out of your fuel tank and dump it into the prefilter. Buy a few of the cheap inline fuel filters and place one in front of the prefilter. Replace the cheap filter when you notice a loss of performance.
Much cheaper to replace 2, 3, 4 or 5 of these than having to replace the stock MB prefilter.