The oil pan used on 2.7L engines is non-reusable, therefore if removed a new one must be fitted in its place. First securely jack up the vehicle and remove the engine oil then clean the oil drain plug and reinsert it. Pull out and, finally, discard the oil filter, and then, the lower engine splash shield and lastly the air filter housing. Subsequently, remove the crossover, and Y-pipe coupled with the converter assembly. On 2.7L engines, unbolt the radiator support panel and the guide pins and fasten the cooling module with plastic straps. Remove the underbody splash shield fasteners and both splash shields, right-side inner fender splash shield and roll restrictor mount. Loosen the stabilizer bar links from the struts, take off the rear crossmember and scribe the two subframe positions. A floor jack with jackstands are to be used to support the subframe and make sure the cooling module is safe. Take out the radiator lower support bolts, subframe rear bolts, and the front bolts and very slightly lower the subframe on both sides. The oil pan mounting bolts can be now removed, the sealant around can be broken, and then the oil pan can be gently lowered down while seeing to it; that it does not touch the exhaust. Replace the oil pump to oil pan seal. The engines that require this procedure to be done are 3.5L and 3.7L; first, unscrew the alternator nut and stud, second, while supporting the engine, shift the transaxle back slightly. Disconnect the transaxle roll restrictor mount and the catalytic converter although the transfer case support brackets in the 4WD version. Pull out the air compressor while keeping the lines on then, unbolt the driveplate inspection cover and several bell housing bolts if necessary. Open the bellhousing from the block, have to unscrew the oil pan fasteners and clean all the surface of the engine. Abuse offorce when mounting may also lead to scratching of the surfaces to which the machines will be mounted on. Replace a pan to oil pump seal on 2:7L engines, use RTV sealant in specific places and fit the oil pan and tighten corner bolts hard and soon. Tighten and check all bolts and fasteners and ensure they have been tightened to the right torque, replace self locking nuts that may be interfered with, replace the oil in the engine with new oil, replace the oil filter and do some leak checks after starting the engine.