Jeep 53021779AB Pan-Engine Oil

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First, disconnect the negative battery terminal and raise the front of the vehicle safely on jack stands, applying the parking brake and blocking the rear wheels. Drain engine oil from the car and if your car has one remove lower splash shield fasteners along with skid plate fasteners. For removal of bolts and nuts around its perimeter take care not to pry it between upper and lower pans to avoid damage. You can tap on a soft-faced hammer to help break loose any stuck gasket or use a putty knife if necessary. Remove power steering gear as well as dipstick tube bracket mounting bolt and then pull out carefully dipstick tube for removing upper oil pan. Remove lower oil pan, coolant tube-to-upper pan fastener, and move back tube. Disconnect the front differential from engine mounts in case it is a 4WD model, connect engine hoist to engine above oil pan bolts to lift it up for access. Four lower oil pan-to-transmission mounting bolts should be removed including torque converter access plate at which point rubber plugs below are taken off too (also two rubber plugs). In order to separate an upper pan from an engine block you should remove nineteen upper oil pan bolts (M6 size) located around it's perimeter with caution. Clean both sumps and surfaces where they come into contact each other; apply RTV sealant to sealing surface of top sump; install top sump & tighten finger tight all screws thereon; finally tighten those pan-to-transmission screws in a circular pattern beginning from centre outwards towards torque value set by manufacturer for this screw size. Lowering bottom part involves application of RTV silicone sealant to mating surfaces, installing bottom part as well as tightening screws in similar circle outward manner ending up at required torque setting indicated by company specifications applicable hereof . Finally fill the crankcase with fresh oil, start-up & run until normal operating temperature has been attained while looking out leaks that could have taken place during previous step.

Refill the engine with new oil. The remainder of installation is the reverse of removal. Start the engine and check for oil leaks.

Apply RTV sealant to the corners where the timing chain cover meets the block and at the rear where the rear main oil seal retainer meets the block.

Clean the oil pan and mating surfaces, inspect the oil pan gasket for damage and replace it if necessary, as the gasket and windage tray are a one-piece design. Position the pick-up tube and oil pan gasket/windage tray in the oil pan, then place the oil pan on the engine, ensuring to use a new O-ring on the pick-up tube.

Proceed to drain the engine oil and replace the oil filter. Remove the dust cover/transmission brace and the fan along with the fan shroud. Detach the automatic transmission cooler lines from the radiator and move them aside.

Place the pick-up tube and oil pan gasket/windage tray in the oil pan and position the oil pan on the engine. Always use a new O-ring on the pick-up tube and tighten the pick-up tube-to-oil pump bolt first. Tighten the oil pump pick-up tube bolt to the specified torque. After the oil pan bolts are started, tighten them in several steps in a criss-cross pattern starting from the center and working out to the ends. Tighten them to the specified torque.