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How to bleed zd30 engine diesel pump

I change the two diesel filter and the engine don't want to start

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Posted on Jan 02, 2017

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  • 95 Answers

SOURCE: 1985 diesel after sitting overnight will not start

The check valve is a small brass fitting where the return line attaches to the filter head. I believe it takes a 7/16" wrench. There is a 'duck bill' inside that prevents fuel from leaking back to the tank causing air in the system. It should allow flow in only on direction. Some times you can see light through it if it's bad enough. Also, the lines between the injectors can dry out and start to leak air. Air will leak in before fuel leaks out, and you won't see it. There are plastic, cup-shaped connectors for these hoses that press onto the top of each injector. They are sealed by two o-rings on each injector body where it meets the connector. These o-rings can dry out and also leak air and fuel. Your Ford dealer or diesel service professional should have the proper o-rings. Any other o-rings might not seal, as they won't be the exact size. You already changed the fuel solenoid when you replaced the pump. It is inside. There has to be battery cranking voltage to it while cranking, and battery voltage with key in 'on' position. The wire attaches to the top of the pump. This is not likely to be the problem, since it restarts every 2 hours.

Posted on Jan 11, 2009

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SOURCE: priming fuel system on a 8.1L diesel engine 2001chev 1 ton dual

Well, one problem is, if its an 8.1, its not a diesel. The 8.1, or Vortec 8100, is a gas engine. The DuraMax is a 6.6 engine. There is usually not a priming system on a gas engine, because the fuel pumps will usually get it through the smaller filters used quick enough you dont need them. However, if it is a DuraMax engine, then right on top of the fitting where you mount your diesel filter, there is a primer pump and an air bleed valve. What you do is, open up that air bleed valve ( its a little black plastic octagon shaped thing on the top of the filter mount) then you pump the primer (the silver button looking thing) until you get diesel squiting out the air vent without too many air bubbles or gurgles.

Posted on Jan 23, 2009

  • 1 Answer

SOURCE: air in fuel line between fuel filter and injection

Hi, before the pump it is a loose connection or maybe a pin hole in the pipe, check all the connections and pipes for seepage, after the pump it will be a leak, i knowit sounds the same but after the pump the fuel is under pressure. It would appear that your system drawing air rather than forcing air in. daveg

Posted on Mar 10, 2009

asetech74
  • 218 Answers

SOURCE: 1999 landrover range rover 2.5 diesel put petrol

I would start by looking for the valve on the fuel rail (or at the filter housing), if you disconnected the fuel pipe from the filter feed you will have a lot of air in the system (and diesels do not like air in the feul system) you will need to have someone crank the motor over while you push in on the schrader valve to release the air out of the system until you get fuel to flow steady out of that port (this may take a short period of time), then you should be able to start the vehicle... would also recommend replacing the fuel filter as well. Hope this helps.

Posted on Mar 10, 2009

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