Oil pump – removal and installation
Warning: Wait until the engine is completely cool before beginning this procedure.
Caution: The oil pressure relief valve must not be removed from the oil pump housing on this engine. If the oil pressure relief valve is removed from the housing, the entire oil pump assembly must be replaced with a new unit.
Note: The oil pump on the Hemi engine is available only as a complete unit.
Removal
1. Disconnect the cable from the negative terminal of the battery (see Engine electrical systems).
2. Remove the timing chain cover (see Section Timing chain cover, chain and sprockets – removal, inspection and installation).
3. Remove the oil pan (Oil pan – removal and installation).
4. Remove the pick-up tube and the oil pump mounting bolts and detach the pump from the engine block (see illustration).
13.4 Location of the oil pump pick-up tube retainer bolt (A) and the oil pump mounting bolts (B)
Installation
5. Position the pump on the engine. Make sure the pump rotor is aligned with the crankshaft drive. Install the oil pump mounting bolts and tighten them to the torque listed in this Chapter’s Specifications.
6. Install a new 0-ring onto the oil pump pick-up tube, connect the tube to the pump and tighten the bolt to the torque listed in this Chapter’s Specifications.
7. The remainder of installation is the reverse of removal.
8. Fill the crankcase with the proper type and quantity of engine oil, and install a new oil filter (see Tune-up and routine maintenance). Fill the cooling system with the proper type of coolant (see Tune-up and routine maintenance).
9. Run the engine and check for oil pressure and leaks.