Chrysler 5038398AE Pump-Engine Oil

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Disconnect the cables from the negative terminals of the batteries. Remove the gear housing cover. Measure the backlash between the gears using a dial indicator. Install the dial indicator tip against one of the teeth on the idler gear and twist the idler gear back and forth. Place the dial indicator tip on the oil pump drive gear and check the backlash between it and the idler gear while securely holding the idler gear from moving. Remove the four mounting bolts and remove the oil pump assembly from the gear case. Remove the back plate of the oil pump assembly. Clean the top of the gerotor planetary of oil and use a felt pen or paint to mark it with the word TOP. Remove the components, clean them with solvent and dry them thoroughly. Assemble the components back in the oil pump housing. If any clearance is beyond that, replace the oil pump assembly. If the original pump is being reused, fill the pump cavity with engine oil and reinstall the back cover, then install the pump assembly in the gear case and tighten the mounting bolts to the torque. The remainder of installation is the reverse of removal. Refill the crankcase with oil, start the engine, and check for leaks and proper oil pressure.

To remove the oil pump, follow these steps: Disconnect the oil pump pick-up tube and solenoid electrical connector. Remove the oil pump timing gear splash shield and press the oil pump chain tensioner away from the chain. Make reference marks on the chain and oil pump gear. Hold the oil pump gear and remove the T45 Torx mounting bolt. Release the tensioner and remove the spring and tensioner from the oil pump. Finally, remove the oil pump mounting bolts and the pump itself.

The first step is to disconnect the cable from the negative terminal of the battery. For 2015 and later models with an Intelligent Battery Sensor, ensure that the IBS connector is disconnected before the negative battery cable.

Maneuver the oil pump solenoid into position until it snaps in place.

If the oil pressure relief valve is damaged, replace the oil pump as one complete assembly.

Clean the top of the gerotor planetary of oil and use a felt pen or paint to mark it with the word TOP.

Position the pump on the engine and make sure the pump rotor is aligned with the crankshaft drive.

Before removing the oil pump, you should start by disconnecting the cable from the negative terminal of the battery. Then, raise the front of the vehicle and support it securely on jackstands. Additionally, drain the engine oil and remove the skid plate and lower splash shield.

Install the oil pump mounting bolts and tighten them to the torque.

Use a feeler gauge and a micrometer or dial caliper to measure the clearance and compare it to the specifications.

Turn the flats in the rotor to align with the flats on the crankshaft and push the oil pump back into position against the block.

If any clearance is excessive, replace the entire oil pump assembly.