Installation Procedure
- NOTE:
The camshaft must be in the base circle position before the high pressure fuel pump is installed.
EN-50790 High Pressure Fuel Pump Installation Alignment Gauge - Install
- Ensure the EN-50790 High Pressure Fuel Pump Installation Alignment Gauge is positioned flush to the cylinder head, which indicates the engine is at base circle position. If necessary, rotate the engine until the tool sits flush to the cylinder head.
- EN-50790 High Pressure Fuel Pump Installation Alignment Gauge - Remove
Lubricate the fuel pump cylinder head bore with clean engine oil. Adhesives, Fluids, Lubricants, and Sealers
- Lubricate the fuel pump roller lifter with clean engine oil and install into the cylinder head bore.
- Install the valve lifter follower (4).
- Lubricate NEW fuel pump O-ring (3) with one drop of clean engine oil and install.
- Install the fuel pump (2).NOTE:
Ensure the plastic bolt retainers are installed in the fuel pump mounting holes before installing.
- Start and hand-tighten the NEW fuel pump bolts (1) evenly.
- Tighten the fuel pump bolts (1) to 25 N.m (18 lb ft).
Electrical Connector (1) @Fuel Pump (2) - Connect
- CAUTION:
Refer to Fuel and Evaporative Emission Hose/Pipe Connection Cleaning Caution .
NOTE:High pressure fuel feed pipes are one time use only. ALWAYS install a NEW high pressure fuel feed pipe if the pipe is removed OR the fittings are loosened.
Fuel Feed Intermediate Pipe (1) - Install NEW - Fuel Feed Intermediate Pipe Replacement
- CAUTION:
Refer to Fuel and Evaporative Emission Hose/Pipe Connection Cleaning Caution .
Fuel Feed Pipe (4) @Fuel Pump - Connect - Fuel Feed Pipe Replacement
- Inspect for leaks using the following procedure:
- Turn ON the ignition with the engine OFF for 2 seconds.
- Turn OFF the ignition for 10 seconds.
- Turn ON the ignition with the engine OFF.
- Inspect for fuel leaks.
- WARNING:
The noise cancelling foam component MUST be replaced if it has been exposed to engine fluids. Failure to replace the noise cancelling foam component that has been exposed to engine fluids may result in an engine fire resulting in catastrophic engine damage, and possible injury or death.
Engine Rear Noise Shield (1) - Install - Engine Rear Noise Shield Replacement
Ensure that the fuel pump roller lifter is oriented properly, the camshaft is at base circle and the number 1 piston is at top dead center (TDC) on the exhaust stroke.
Refer to Fastener Caution .
Alternately hand-tighten the fuel pump bolts one turn at a time until the pump is fully seated. Trying to draw down the pump without even side-to-side tightening may result in pump plunger damage.
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.