Thread: A fault in the 4bd1's reliability!!

I aswell had the same problem. Along with the other pipes cracking one by one. All the larger hoses are now replaced with Ryco trucker line, which is flexible.

As for the small line, mine broke in exactly the same spot, but i was able to make a temporary (10,000km......) fix. I got some 6mm air line, and slid it over the injector hose, then slid 8mm air line over the top of that. The 8mm then slid over the larger part of the broken pipe in the banjo fitting, and then secured it all with a few small hose clamps. It weeped a little, but didnt drip, as it is only the return line, and not under much preassure


Andy

Hi Dobbo, that's a good point. I did not have the problem on my County 110 Isuzu during the 15 years of ownership. If I recall correctly, the only problem I had in the Engine bay was with the electric mechanism controlling the fuel valve. It corroded beyond repair.Cheers, 130man.

The pig tail is in the return line to give it some flexibility - take strain when connecting to filter and for thermal expansion.

However adding weight and increasing flexibility through lengthening the pipe, will lower it's resonant frequency. Best to use flexible hose like Andrew has done.

The fuel filter on the truck engines have a flexible mount so flex in that line is even more important.

I'm moving the fuel filter away from the engine and will run flexible delivery and return hoses instead of pipe.

I wondered why mine had a piece of rubber hose in that line. Seems that is the solution.