Nissan 12297-F6500 RETAINER-Oil

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An interesting aspect is the one-piece sealing system that is put into a housing located at the transaxle extension of the block; an element where the crankshaft is inserted prior to engaging the main bearing caps and, in fact, where the new Crankshaft Seal is fitted into the retainer and bolted to the block. Again, the seal contact surface needs to be checked for any roughness due to scratching causing the trim on the new seal lip and eventual oil leakage; if the crankshaft is badly worn, advice to get a replacement. The old seal can be easily chased out using hammer and punch from the back side of the retainer by noting down the depth; it is to be remembering that while fitting the new Crankshaft Seal this depth is required to be followed to without causing any harm to the bore in the retainer that results in the leakage of oil. Once the retainer has been cleaned, a thin layer of engine oil is then applied to the outer periphery of the new seal which has to be fitted squarely into the retainer bore, if a press is not available, then the retainer and the seal can be put in between two identical wooden blocks and the vise is applied till the force is evenly distributed and the seal is properly aligned with the retainer so that the them being pressed together Lubricate both sides of the seal lips with moly-base grease or engine assembly lube or before placing of the seal/retainer over the crankshaft is done then it should be firmly fit into the block and a new gasket should be used without sealant, the dowel pins should also be put before fitting the seal/retainer. Last of all the screws should be tightened in sequence to approximately the tightening torque decided upon.

After removing the old seal, clean the bore to eliminate any remnants of the old seal material and corrosion.

Remove the timing belt covers and timing belt, then carefully remove the crankshaft sprocket with a prybar or two screwdrivers, taking care not to damage the oil pump body.

The seal lips must be lubricated with clean engine oil or multi-purpose grease before the seal/retainer is slipped over the crankshaft.

Apply a continuous 1/8-inch bead of RTV sealant.

The remaining steps involve reversing the removal process.

Carefully pry the old seal out of the retainer with a seal removal tool or screwdriver.

If the crankshaft is damaged, the new seal will leak.

Lubricate the crankshaft seal journal and the lip of the new seal with multi-purpose grease.

Before installing the new seal, inspect the surface of the damper that the oil seal rides on. If the surface is grooved from prolonged contact with the seal, consider using a press-on sleeve to renew the sealing surface. These sleeves are commonly available at most auto parts stores.

Before installation, apply a thin coat of multi-purpose grease to the inside of the seal. Fabricate a seal installation tool with a short length of pipe of equal or slightly smaller outside diameter than the seal itself. File the end of the pipe that will bear down on the seal until it's free of sharp edges. You'll also need a long bolt of the same thread pitch as the crankshaft pulley bolt and a large washer, slightly larger in diameter than the pipe, on which the bolt head can seat.

Rotate the crankshaft by hand to check for binding.

The first step when installing a one-piece seal for the crankshaft is to install the crankshaft itself and bolt the main bearing caps in place.

If the crankshaft is damaged, the new seal will leak.

Slide the timing belt plate back onto the crankshaft, insert the Woodruff key, and apply assembly lube to the crankshaft timing pulley before sliding it on.

Use a blunt tool, such as a brass punch, to carefully work the edge of the seal evenly into the bore and around the crankshaft.

Use a seal driver or a large socket and hammer to drive the new seal into the bore until it is completely seated. Ensure that the new seal is pressed in place until it bottoms against the cover flange. Select a socket with the same outside diameter as the seal.

Carefully pry out the old seal with a seal removal tool or screwdriver.

Install the oil seal by pressing it into position with the seal installation tool. When the seal is bottomed in the housing, don't turn the bolt any more or you'll damage the seal.

First, ensure the retainer is clean and apply a thin coat of engine oil to the outer edge of the new seal. The seal must be pressed squarely into the retainer bore; hammering it into place is not recommended. If a press is not available, the retainer and seal can be sandwiched between two smooth pieces of wood and pressed into place using a large vise. The wood must be thick enough to distribute the force evenly around the seal's circumference, and care should be taken to ensure the seal enters the bore squarely.

The remaining steps are the reverse of removal.

The remaining steps are the reverse of removal.

It is recommended to press the new seal into the retainer bore using a press or, if a press is not available, by sandwiching the retainer and seal between two smooth pieces of wood and pressing it into place with the jaws of a large vise.

Apply multi-purpose grease to the crankshaft seal journal and the lip of the new seal.

Press the oil seal into position using the installation tool, tightening the bolt until the seal is bottomed in the housing without turning it further to avoid damage.

Remove the crankshaft pulley, timing belt covers, and timing belt.

Remove the crankshaft pulley from the engine.

The remaining steps involve reversing the removal process.