BMW 11117584398 Shaft Seal

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To change the crankshaft front oil seal, detach the crankshaft vibration damper. To replace the crankshaft rear oil seal, remove the flywheel/driveplate. While the flywheel/driveplate is off, this would be an ideal time to check on your vehicle's manual transmission clutch. Carefully pry out the oil seal from within a cylinder block using a flat-bladed screwdriver or a similar tool. Try as much as possible not to destroy either side of where you have placed it on your engine. Alternatively, drill two tiny opposing holes in the hard outer surface of the sealant, insert two self-tapping screws and use pliers to pull out this particular type of filler material. Before applying any lubrication between crank shaft hub and cylinder block surfaces make sure that they are cleaned up very well with clean engine oil solution. Genuine BMW seal kits come with a guide sleeve pre-fitted into the seals using Loctite sealing compound and primer at place. Set seal and guide sleeve onto crankshaft hub such that slots located at external periphery of sealer are aligned with junction in cylinder block. Apply Loctite primer supplied to both slots on outer sur-face of sealer using brush provided for that purpose only. Make sure you leave it for at least one minute before proceeding forward because most times you may find yourself running after some little mistakes which could have been avoided if enough time was given for drying process. Use right size socket or pipe to push in new oil seal squarely as possible until it becomes flush with its outer edge only then should you stop hammering; also force some Loctite primer into slot on each side of lip by means of brush supplied; inject additional loctite sealing compound by way of kit syringe into slot on each side of lip finally apply some more primer over coating sealing compound. Afterwards fit back crank shaft vibration damper or fly wheel drive plate assembly again return sequence.

With the engine fully cooled off, remove the electric cooling fan and cowl, engine accessory belts and crankshaft vibration damper and pulley. Be sure to mark belts with direction of rotation. Install cap (BMW special tool 11 2 383) on the end of the crankshaft. Install seal guide (BMW special tool 11 2 385) over the end of the crankshaft. Be sure to align the groove with the keyway on the crankshaft (arrow). Install oil seal puller (BMW special tool 11 2 380) and screw in the body of the puller until it contacts the seal. Tighten the bolt in the center of the tool to draw the seal out of the cover. Coat the new seal with oil and position it in the timing chain cover. Use BMW special tool 11 3 280 and the crankshaft center bolt to draw the seal in flush with the timing case cover. Reinstall the crankshaft vibration damper and pulley. The remainder of the installation is the reverse of removal, noting the following: Install engine accessory belts. Install the cooling fan.

The clutch on manual transmission vehicles should be checked.

Position the seal and guide sleeve on the crankshaft hub, aligning the slots in the outer circumference of the seal with the joint in the cylinder block.

Thoroughly clean the sealing surfaces of the crankshaft hub and cylinder block, then apply a light coating of clean engine oil to the sealing surface of the crankshaft hub.

Secure special tool 11 9 182 to the crankshaft with tool 11 9 184, then connect tools 11 9 185 and 11 9 181.

Use BMW special tool 11 0 371 to screw into the crankshaft seal and torque it to 80 Nm (59 ft-lb).

Attach BMW special tool 11 9 232 to the vibration damper hub using bolts from special tool 11 9 234. Place the crankshaft seal and installation sleeve over the tool against the crankcase opening, ensuring the seal grooves are centered on the crankcase seam.

Carefully remove the seal carrier without damaging the oil pan gasket.

Use the BMW special tool 11 9 200 to pull out the seal by inserting sheet metal screws into the removal openings and tightening them snugly. Slowly screw in the seal remover spindle to extract the seal.

The vibration damper hub bolt should not be removed to avoid valve damage.

The clutch on manual transmission vehicles should be checked.

The oil seal should be driven into place as squarely as possible using a seal driver, a suitable socket, or a piece of pipe of the appropriate diameter until its outer edge is flush.

Before installing the new seal, the seal seating surface should be cleaned, and the crankcase seams should be degreased. A light coat of engine oil should be applied to the seal lip running surface on the crankshaft flange.