Ano proper way (step by step) to bleed a dieself fuel system?

[theveed]

Like from the hose inlet to the filter to the injector pump to the injector lines etc.

[OTEP]

On a W123, just open unsrew the bleed pump, pump like hell, then screw back bleed pump.

On most other vehicles, open drain under fuel filter, pump like hell, screw back drain.

[ARB]

what i do is pump first, open bleeder screw, let the air out, pump again, open bleeder until the fuel that goes out is pure diesel wala nang air. then pump it again until the pump hardens.

[afrasay]

I second ARB. Pump first then bleed, just like... ;)

[yebo]

some injectors will not work if there is air in the lines from the injector pump to the injector. so you will also need to bleed the lines one by one. as in the posts above, bleed the injector pump first, then open the fitting nearest the injector just 1/2 turn, then pump until the fuel comes out. do this with all the injectors one at a time.

although i'm not familiar with the diesels in your suv/pick up, most of the small isuzu, toyota and mitsubishi engines i work on need this to work properly. you'll know a completely bled injector line when the engine runs smoother than if there is still air in the lines. this is due to uneven injection if there is air since air can be compressed. think of the air in the line as a spring, it contracts and expands as the pressure varies. as the air contracts in volume during the high pressure injection phase it leads to a smaller amount of fuel delivered by that particular injector.

[theveed]

Otep: yun usually ginagawa ko but may knock padin, when I had it bled sa shop ng friend ko (nagpalit kasi ako ng filter) iba yung result sa kanila nawala knocking at low speed/idle that I've been having the past 2 years.

(lagi kasi ako nauubusan ng gas hehe)

[theveed]

ARB/Alfred/Yebo: Thanks din nga pala hehe... try ko pag kailangan na ulit i-bleed... :D