To bleed a diesel fuel engine, check the fuel filters, access the fuel lines, open the cut-off valve, leak the fuel, and clean up everything. Bleeding a diesel fuel engine takes roughly 1 hour and requires mechanic tools, rags, a container for the fuel and an engine hoist.
- Check the fuel filters
Locate the fuel filters, and examine them carefully for clogging. Look over the fuel line for holes, which cause air leaks.
- Find the fuel lines
While some vehicles offer easy-access to the fuel lines, others are covered by a valve cover. If necessary, remove the valve cover to expose the fuel lines. Typically a wrench is needed to remove valve covers, though a screwdriver may also be necessary.
- Open the fuel cut-off valve
The exact location of the fuel injector depends on the make of the car. However, typically the forward-most injector is the cut-off valve. Select the appropriate wrench to loosen the bolt, thereby opening the cut-off valve.
- Prepare the engine
Place the engine in no-fuel mode. Attach an engine hoist to the engine to turn it over. Place the container on the floor near the engine to catch the fuel.
- Bleed the diesel fuel
Using the engine hoist, turn the engine over. Diesel fuel should start leaking out from the cut-off valve. Watch for bubbles in the fuel leaking out of the valve. When there are no more bubbles in the fuel, tighten the bolt on the valve again with a wrench.
- Clean up everything
Carefully move the engine back into its natural position. Dispose of the fuel in the container, and use rags to clean up any spills.