GM 10128316 Seal,Crankshaft Front Oil

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Remove the cable from the negative battery terminal. Remove the drive belt. Raise the vehicle and securely place it on jackstands. Remove the hub retaining bolt. Place a bar through one of the pulley holes and wedge it against the bottom of the front cover to keep the pulley from turning while loosening the pulley bolts. Remove the pulley hub. Use a puller if necessary. Note how the seal is installed-the new one must face the same direction! Carefully pry the Crankshaft Seal out of the cover with a seal puller or a large screwdriver. Be very careful not to distort the cover or scratch the crankshaft! Apply a thin layer of engine oil or multi-purpose grease to the Crankshaft Seal lip and to the outer edge of the new seal. Install the seal in the cover with the lip (open end) facing IN. Drive the seal into place with a large socket and a hammer. Make sure the seal enters the bore squarely and is driven in until the front face is flush with the cover. The seal can also be replaced if the timing chain cover has been removed for other work. Support the cover on a block of wood and drive the seal out from the backside. Install a new seal into the bore. Reinstall the timing chain cover with a bead of RTV sealant applied to the mating surface of the oil pan. Apply a small amount of RTV sealant on the crankshaft Woodruff key. Align the slot in the hub with the crankshaft Woodriff key, then press the hub onto the crankshaft until it bottoms against the crankshaft timing gear. The hub retaining bolt can be used to press the hub into position. Install the crankshaft pulley on the hub. Use a non-hardening thread-locking compound on the bolt threads. Tighten the hub-to-crankshaft bolt. Install the drive belt.

You should check the crankshaft surface for scratches and nicks that could damage the new seal lip and cause oil leaks. If the crankshaft is damaged, it may need to be replaced with a new or different one.

Clean the bore to remove any old seal material and corrosion.

Lubricate the cap seal lips and carefully position the bearing cap on the block. Install the bolts and tap the crankshaft to line up the main bearing and crankshaft thrust surfaces. Finally, tighten the rear bearing cap bolts to the specified torque. Install the oil pump and oil pan.

The seal lip must face toward the front of the engine.

Apply clean engine oil or multi-purpose grease to the outer edge of the new seal, then install it in the cover with the lip (spring side) facing IN. Drive the seal into place with a large socket and a hammer (if a large socket isn't available, a piece of pipe will also work). Make sure the seal enters the bore squarely and stops when the front face is at the proper depth.

The new seal should be positioned in the bore with the seal lip (usually the side with the spring) facing IN (toward the engine).

The oil seal should be pried from the block using a screwdriver, taking care not to damage the crankshaft or seal bore.

Use a punch or screwdriver and hammer to drive the seal out of the cover from the back side.

After installing the new seal, you should reinstall the flywheel or driveplate.

A seal installation tool.

The remainder of the installation is the reverse of the disassembly.

Apply clean engine oil or multi-purpose grease to the outer edge of the new seal, then install it in the cover with the lip (spring side) facing IN. Drive the seal into place with a large socket and a hammer (if a large socket isn't available, a piece of pipe will also work). Make sure the seal enters the bore squarely and stops when the front face is at the proper depth.

Clean the bore and position the new seal in the bore with the open end facing in. Then, drive the seal into the bore with a large socket and hammer.

A tool that tightly fits the diameter of the seal can be used with a hammer to drive the seal in.

You should drive the new seal into the bore with a seal driver or a large socket and hammer until it's completely seated.

If the special tool is not available, you can carefully work the seal lip over the end of the crankshaft and tap the seal in with a hammer and a blunt drift until it's seated squarely in the bore.

Thoroughly with a shop towel, removing all traces of oil and dirt.

After removing the drive belt, you need to raise the vehicle and securely place it on jackstands. Then, remove the hub retaining bolt.

Start the engine and check for leaks.

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