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Re: priming fuel system on a 8.1L diesel engine 2001chev...
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.
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If fuel filter has been changed suspect lack of fuel to engine, Diesels sometimes have a manual priming pump to over come this problem, the cars diesel pump will not easily self prime., although some GM engines are designed like this. Always fill fuel filter bowl with clean diesel when re assembling. A after market manual pump with non-return valve is often fitted as an addition to overcome this difficulty.
I'm guessing that you got an air lock in your fuel system as a result of your changing the fuel filter... I certainly don't know about a BMW diesel, but in most semi-truck engines, there is a priming pump just for the purpose of getting the air out ... and the fuel into.... the fuel system. I've even been known to fill the filters with diesel fuel before screwing them onto the base.. This is risky because of the possibility of allowing some foreign, unfiltered debris to get into your pump and/or injectors, just because of your putting unfiltered fuel into your filter... Check and see if there is some kind of priming pump close to the filter. Also, a possibility is that you may have an electric fuel pump.... as to where all you may need to do is loosen a fuel fitting on the pressure side of the pump and filter.... and allow the electric pump to purge the system of air.. I confess to my lack of knowledge on your BMW.... but, I do have some basic understanding of most diesel systems... Good luck..
I'm not familiar with that particular vehicle, but most diesel systems have a primer under the hood. You will need to pump that slowly until you feel some resistance. That will push fuel to the engine. The other pump may not be able to push fuel through until the system is primed.
If that doesn't get you running I would suspect a clogged fuel filter. Most Dodge vehicles have one on the frame. Just follow the fuel lines until you find it. There may also be one attached to the pump primer.
Changing that filter would my next action. Whether the pump is in the tank or added on outside the tank, you may still need to prime the system after the filter is replaced. Air in the line may cause it to stall, just reprime and start again.
Hello and welcome. you will have to perform the bleed procedure using the fuel prime on the fuel filter housing. there is a pump on top of the fuel filter assembly, on the passenger side of engine.
Open the vent valve screw (1) by turning the screw counterclockwise several full turns.
Operate the priming pump (1) by repeatedly pumping until a small amount of fuel seeps from the vent valve. Allow the pump to fully return upward between pumps. When fuel is present, the filter is full of fuel and the system is primed.
Close the vent valve screw.
This system should be self priming, however if it did run out of fuel, I highly recommendchanging the filters.After doing so have an assistant turn key to run as you listen for fuel lift pump running,(under drivers side floor attached to frame, one of the fuel filters is part of pump,the other filter is on top of engine) Could have hurt pump by running dry. They are notorious for hard start after filter change and/or out of fuel.Hope this helps.
You need to install an electric fuel pump to lift the fuel from the tank to the mechanical pump. You can turn off the electric pump after starting or use it when bleeding the lines after changing the fuel filter. You can start the truck after a few minutes instead of a few days. I know from experience and fought that problem for years.