In 3.7L engines, the process can only be done when the engine is out; it is assumed that the 3.7L engine has been pulled out, and so all the steps that do not apply should be disregarded. Start with removing the cable on the negative battery terminal and then lift the vehicle and place on jackstands. Empty the engine oil, replace the oil drain plug and screw it to the required torque with a new sealing washer. Take out the oil filter and unconnect the oxygen sensor connector(s). The next step would be to take out crossover and flexible exhaust pipe and converter assembly and then the driveplate access cover. 3.7L engines have the nut and stud on the alternator removed and the bolts that held the oil pan on the transaxle are removed. Disassemble the timing chain cover,
Flywheel driveplate, and crankshaft position sensor timing ring and place the engine on an engine stand by making sure that only the bellhousing flange is bolted. Unscrew the fasteners of the oil pan and the oil pan, keeping track of the whereabouts of the stud bolts. In the case of 3.7L engines, two of the original oil pan bolts with threads at the front and back of the pan should be installed into the two holes and tightened to have all the oil pan slide away, in a straight line, with the block. Removal of the oil screen and pick-up tube is done by removing the oil pan gasket, and, where there are fasteners that hold the oil screen and the pick-up tube, removal of the fasteners is necessary, followed by removal of the screen and tube assembly. Wipe the oil pan and cylinder block mating surfaces with lacquer thinner or acetone and make sure that they do not have any residue. In order to do this, should it be removed, place a new O-ring seal on the oil pick-up tube and then install the tube and screen assembly, tightening the retaining fasteners to the recommended torque. Install another self-locking nut that will hold the pick-up tube support bracket and clamp it to the given torque. In case of 3.0L engines, install a new gasket on the oil pan and apply a bead of RTV sealant (1/8-inch) to the oil pan gasket at the place where the timing chain cover-to-cylinder block parting line is. Install the pan bolts, then tighten them by hand, and make sure to install any stud bolts in the mentioned positions when removing. Install the oil pan-to-transaxle bolts and press the oil pan firmly against the transaxle and secure the pan-to-transaxle bolts firmly and then gradually and uniformly screw the oil pan bolts to the required torque. With 3.7L engines, place RTV, 1/8-inch, on the flange of the oil pan and place the pan on such that only the 4 corner bolts are hand tightened. Place the pan face to the boss beneath the alternator and use a straightedge to place the pan in contact to the rear side of the block in a hurry and install the remaining bolts and tighten them in a criss-cross pattern until they are all in place and to the correct torque. The rest of the installation procedure is the opposite of the un-installation procedure which is to tighten all the fasteners to the required torque values, in all instances replace disturbed self-locking nuts during the removal, fill the engine with new engine oil, and fit a new oil filter. Lastly, turn on the engine and inspect it.