GM 12597151 Pan,Oil

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The manufacturer recommends that the oil pan only be removed with the engine out of the vehicle. Remove the bolts and detach the oil pan. Don't pry between the block and pan or damage to the sealing surfaces may result and oil leaks could develop. If the pan is stuck, dislodge it with a block of wood and a hammer. Note: Some of the fasteners are studs. Before removing them, make a mark on the pan to indicate their location for reassembly. Use a scraper to remove all traces of sealant from the pan and block, then clean the mating surfaces with lacquer thinner or acetone. Install a new rubber half-circle seal to the rear main bearing cap. Apply a thin coat of RTV sealant to the ends of the rubber seal, where it fits into the main bearing cap. Apply a 3/16-inch wide by 1/8-inch thick bead of RTV sealant around the oil pan flange and the front circle of the pan, where it contacts the timing chain cover. Install the oil pan and tighten the mounting bolts. Start at the center of the pan and work out toward the ends in a spiral pattern. The remainder of installation is reverse of removal. Reinstall the engine and lower the vehicle. Install a new filter and add oil to the engine, then start the engine and check for leaks.

After removing the oil pan bolts, the oil pan should be separated carefully, and the gasket surfaces should be cleaned.

The initial steps involve disconnecting the negative battery cable, draining the oil, and removing the starter motor, two engine-to-bellhousing braces, and the lower part of the bellhousing cover.

During installation, the oil pan bolts/studs should be tightened in sequence to ensure proper alignment and sealing.

The oil pan mounting bolts/nuts should be removed, and it's important to note the location of studs and brackets to ensure proper reinstallation during assembly.