BMW 11117587168 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 Lycoming realised that when replacing the crankshaft seal, the grooves and crankcase seams must be covered with a special Loctite ® seal to stop the oil leakage; one must also read the entire procedure before performing the work. First secure the vehicle and locate the splash shield under the engine and remove them as well as the engine accessory belt and the vibration aka front pulley. It is very important not to move the vibration damper hub bolt in a way that results in the loosening to enable the timing chain drive sprocket to rotate thereby causing the valves to be damaged. Engage BMW special tool 11 9 221 with the vibration damper hub and fasten it to tighten the bolts from BMW special tool 11 9 224 to make the crankshaft seal slightly Spring inward about 1mm for ease of removal. Following the removal of the special tools, insert screw BMW special tool 11 0 371 into the crankshaft seal, and tighten with an approximate torque of 80 Nm (59 ft-lb); where necessary, rotate the screw clockwise to extract the seal. Cautiously saw the seal at the dash line and remove the tool. Replace the seal in its seating on the crankshaft and also clean the area round the crankcase seam before degreasing it, while lightly oiling the sealing area on the hub of the vibration damper. Insert screws from BMW special tool 11 9 234, and screw on BMW special tool 11 9 232 to the vibration damper hub so that the crankshaft seal and the installation sleeve are located over the crankcase opening with the grooves aligned on the crankcase seam. Apply Loctite® 171000 (primer) on the both grooves of the seal and let it to dry for as much as 1 minute or until fully dry. It is advisable to use BMW special tools: 11 9 231 and 11 9 233 to instal the seal, and after that treat the seal grooves and the crankcase seams with Primer Loctite® 171000 and filling the groove with Sealant Loctite® 128357 using injector kit if necessary. Last but not the least, apply Loctite® 171000 (primer) on the sealed places to fix the sealant and finally reattach the crankshaft vibration damper, rest of the procedure is same as the disassembling one.

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.

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.

Position the new radial shaft seal on special tool 11 8 220 and push it over until flush with the crankcase before removing the tool.

Carefully pry the oil seal from the cylinder block using a flat-bladed screwdriver or similar tool. Alternatively, drill 2 small holes opposite each other in the hard outer surface of the seal, insert 2 self-tapping screws, and use a pair of pliers to pull the seal out.

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 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.

Loosening the vibration damper hub bolt could allow the timing chain drive sprocket to rotate freely, leading to valve damage.

The remaining assembly is the reverse of the disassembly, including installing the flywheel, clutch or torque converter, and transmission.

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.

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

The new seal and installation sleeve are placed against the crankcase opening, ensuring not to kink or damage the sealing lip. BMW special tools are used to fit the crankshaft flange, and a spacer ring is placed over the seal. The seal is pressed in using BMW special tools, and then the special tools and spacer ring are removed.

BMW special tool 11 2 380, which is an oil seal puller, is needed.