GM 12637710
Rear Main Seal

To replace the crankshaft rear oil seal and housing, remove the engine fly wheel, take off the Oil Pan, take off the crankshaft rear oil seal and housing. After removal, install the new crankshaft rear oil seal and housing and then reattach the oilpan and lastly reinstall the engine Flywheel. The machinist needs to prepare the following tools in this process: the engine Flywheel (part number: ). 123456), oil pan (part number: Crank shaft front oil seal and steering pump (part number: 123456), oil pan (part number: 654321) and crank shaft rear oil seal and housing (part number: 789012).

Start by removing the engine Flywheel, oil pan and then the crankshaft rear oil seal and housing. After that, replace the crankshaft rear oil seal and housing, then fit the Oil Pan and lastly secure the engine Flywheel. Make sure to use the correct tools according to the instructions. Engine Flywheel replacement (tool required: you will need the engine Flywheel tool, oil pan tool and Crankshaft Seal tool to carry out these repairs.

To replace the Crankshaft rear oil seal, start by removing the engine Flywheel without damaging the Crankshaft or seal bore. Then, after you've removed as much of the old grease as you can, pry out the Crankshaft rear oil seal by inserting, at an angle, through the dust lip, the flat-bladed tool while moving, the handle towards the end of the Crankshaft, repeating if old as many times as you can. Before installation, make sure that no oil lubrication is put on the Crankshaft rear oil seal and on the seal installer (J34686), and during the process of removing the protective sleeve off the sealing lip do not touch it to avoid damaging it. Clean Crankshaft sealing surface using a lint-free towel and looking at the lead-in edge for burrs and sharp edges, eliminate these using crocus cloth. Prcisely lift off the protective sleeve from the new Crankshaft rear oil seal and slip in it into the j34686, slidding it over the mandrel till it fastens against the collar. Splint the dowel pin of the j34686 with the dowel pin of Crankshaft attach tool hand or screw to 5 nm (45 inch lbs.) and t handle to compress the seal into the bore until the collar is tight against the engine block be certain to provide implement seating. Unscrew the t-handle until it cannot be unscrewed any further, then remove the attaching screws and finally reinstall the engine Flywheel.

A procedure for Oil Pan removal based on the Oil Pan replacement guide must be followed before starting crankshaft rear oil seal and housing replacement work. Follow the engine Flywheel replacement procedure to remove the engine Flywheel before proceeding. Start by following the crankshaft rear oil seal and housing removal procedure to extract the housing and its rear seal. Installation begins with placing the crankshaft rear oil seal and housing into position following the crankshaft rear oil seal and housing installation procedure. You should first replace the engine Flywheel using the engine Flywheel replacement procedure before installing it back with the Oil Pan replacement procedure.

The replacement process starts by removing the engine Flywheel then the Oil Pan and finally the crankshaft rear oil seal and housing. Firmware installation starts with the crankshaft rear oil seal and housing placement followed by reinstalling the Oil Pan before installing the engine Flywheel.

To replace crankshaft rear oil seal, be certain to remove the fly wheel without damaging the outside diameter of the crankshaft or chamber. Pry out the old rear oil seal using a flat-bladed tool to do this. Next, use the en-42067 (Rear Main Seal Installer) to install a new rear oil seal crankshaft using. Finally, reinstall the Flywheel.

Place the new crankshaft rear oil seal and housing.

Remove the crankshaft balancer.

Remove the A/C compressor and power steering pump drive belt.

Use the Oil Seal Installer (J 29184) or an equivalent tool to install the new crankshaft front oil seal.

Take out the crankshaft rear oil seal and housing.

Utilize the J-29184 (Oil Seal Installer) to install the new crankshaft front oil seal.

First, remove the crankshaft balancer.

Utilize the Seal Remover (J 45000) to extract the crankshaft oil seal.

Remove the engine flywheel.

First, remove the crankshaft balancer.

Turn the T-handle to push the seal into the bore until the collar is tight against the engine block, ensuring proper seating of the seal.

Remove the crankshaft balancer.

Reinstall the crankshaft balancer.

Reinstall the oil pan.

Take off the crankshaft balancer using the appropriate procedures.

Remove the oil pan.

The crankshaft balancer.

Remove the engine flywheel from the crankshaft.

Install it onto the center hub of the J 45930-A, tightening the mounting bolts until the installer is firmly attached to the crankshaft.

Use the Oil Seal Installer (J 29184).

Utilize the Crankshaft Rear Oil Seal Installer (J45930) to install the new rear crankshaft oil seal.

Utilize the Crankshaft Rear Oil Seal Installer (J 45930-A) to install the new rear crankshaft oil seal.

The generator and water pump drive belt.

The seal and the sealing surfaces of the crankshaft balancer.

Take off the oil pan.

Take off the oil pan.

Reinstall the oil pan.

Install the new crankshaft rear oil seal and housing.

First, remove the crankshaft balancer.

Reinstall the oil pan.

Take off the crankshaft balancer.

First, remove the crankshaft balancer.

Remove the crankshaft balancer.

Take out the crankshaft rear oil seal following the Crankshaft Rear Oil Seal Removal procedure.

Reinstall the Crankshaft Balancer Holder (J 38122-A) to keep the flexplate from rotating while tightening the new flexplate bolts.

Use a flat-bladed tool to remove the seal.

The generator and water pump drive belt.

Use a flat-bladed tool to remove the crankshaft oil seal.

Utilize the Oil Seal Installer (J 29184) to install the new crankshaft front oil seal.

Remove the crankshaft rear oil seal and housing.

Utilize the J 35268-A (Camshaft/Front Main Seal Installer) to properly install the new crankshaft front oil seal.