BMW 11117547842 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.

The crankshaft vibration damper or flywheel/driveplate and crankshaft position sensor should be installed.

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.

Using the brush provided, coat both slots on the seal outer surface with the Loctite primer supplied. Allow the primer to dry for at least one minute before proceeding.

After removing the special tools, screw BMW special tool 11 0 371 into the crankshaft seal with about 80 Nm (59 ft-lb) of torque, then rotate it clockwise to extract the seal. Repeat the process if necessary.

The sealing surfaces of the crankshaft and cylinder block should be thoroughly cleaned, and a light coating of clean engine oil should be applied to the sealing surface of the crankshaft.

Install the new seal carrier to the crankcase, ensuring that the locating sleeves and bores are not damaged.

Begin by removing the transmission, followed by the clutch pressure plate and disc for manual transmission vehicles, and then the flywheel. Drain the engine oil, and if necessary, scrape off the rubber coating to expose the six removal openings on the crankshaft rear main seal.

The BMW special tools 11 9 231 and 11 9 233 are used to press in the seal.

Align the groove of the radial shaft seal centered to the partition in the crankcase and install it with tool 11 9 231 in conjunction with tool 11 9 233 until it is flush with the crankcase.

Crankshaft rear main seal replacement requires the removal of the transmission and flywheel, with caution taken to fill grooves and crankcase seams with special Loctite® sealant to prevent oil leaks.

The oil seal can be carefully pried out using a flat-bladed screwdriver or similar tool. Alternatively, two small holes can be drilled in the seal, self-tapping screws can be inserted, and the seal can be pulled out with pliers.

Crankshaft rear main seal replacement involves removing the transmission and flywheel, draining the engine oil, and removing the clutch pressure plate and disc for manual transmission vehicles.

The belts should be marked with the direction of rotation.