Installation

Installation

1. Install the O-ring to the fuel supply pump.






2. Install the pump to the bracket and tighten the 3 bolts to the specified torque.

Tightening torque: 19 N-m (14 lb ft)

CAUTION: Take care not to twist the O-ring.







3. Align the fuel supply pump shaft key and gear. Install the gear and tighten the nut to the specified torque.
There is a round alignment mark on the gear (white paint).

Tightening torque: 64 N-m (47 lb ft)







4. Apply white paint to the top of the fuel supply pump gear tooth directly above the stamped 'O' mark. Refer to the illustration.







5. Turn the crankshaft in the normal direction of engine rotation until the No. 1 or No. 4 cylinder is at TDC on the compression stroke.
Refer to the illustration.






NOTE: There are 2 timing marks on the crankshaft pulley.
Mark (1) is near the front cover and is used to bring the 4HK1-TC engine to TDC.
Mark (2) is not applicable to this engine. Be sure to use mark (1) when bringing the engine to TDC.



6. Remove the oil drain adapter.
7. Install the O-ring to the fuel supply pump.
8. Align the slits as shown in the illustration.
9. Insert the stud bolts into the guides and temporarily tighten them.

CAUTION:
- If the stud bolts (cylinder block side) have been loosened or replaced, apply Loctite 262 to the recessed portion of the bolts.







- Check that the round alignment mark (white paint) is positioned as shown in the illustration when viewed from the plug hole. If necessary, reposition the gear.
- Tighten the stud bolts and the nuts to the specified torque.

Tightening torque
nut: 50 N-m (37 lb ft)
bolt: 76 N-m (56 lb ft)






10. Apply a light coat of engine oil to the O-ring.
11. Install the oil drain adapter to the plug hole. Tighten the bolt to the specified torque.

Tightening torque: 8 N-m (69 lb in)







12. Connect the fuel temperature sensor and the fuel rail pressure regulator connectors to the fuel supply pump.
13. Install the fuel feed hose.
14. Install the throttle assembly.
- Coat the fluid gasket and mount within 7 minutes.

Tightening torque: 24 N-m (17 lb ft)

- Install the intake throttle valve chamber hose.







15. Install the fuel pipe and fuel leak-off pipe

Fuel Supply Pump Relearn Procedure
The ECM gose through a fuel supply pump learn procedure to fine tune the current supplied to the fuel rail pressure (FRP) regurator. This learning process in only performed when the engine is idling.

1. Install the scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Turn ON the ignition, with the engine OFF.
4. Command the Supply Pump Learn Reset with the scan tool.
5. Observe the Supply Pump Status paremater with the scan tool. Confirm the scan tool indicates Not Learn.
6. Start the engine and let idle until engine coolant temperature (ECT) reads 149 °F (65 °C) or higher while observing Supply Pump Status parameter with the scant tool. The scan tool changes status Not Lean > Tentative > Learning > Learned.
7. If the ECM has correctly learned the fuel supply pump current adjustment, the Supply Pump Status parameter on the scan tool will indicate Learned.