BMW 11142249532 Shaft Seal

To replace the crankshaft front oil seal, follow the timing chain cover removal and installation procedure. For the crankshaft rear oil seal, begin by removing the flywheel/driveplate. At the bottom of the oil seal housing, unscrew the bolts securing the rear of the oil pan to the housing, then unscrew the bolts securing the oil seal housing to the engine block. If the housing is stuck to the oil pan gasket, use a sharp, thin blade to separate them without damaging the gasket. Withdraw the housing from the engine block, gently tapping it with a soft-faced mallet if necessary, and remove the gasket. Clean all traces of old gasket and sealant from the mating faces, taking care not to damage the oil pan gasket; if it is damaged, install a new one. Support the oil seal housing on blocks of wood and drive out the seal from the rear using a hammer and drift, then clean the seal mating surfaces. Install the new seal using the seal protector, ensuring not to touch the sealing lip, and drive it into position with a seal driver. Ensure the locating dowels are in place, then position a new oil seal housing gasket over them. Carefully install the housing to the engine block, sliding the oil seal protector over the crankshaft flange, and push the seal and housing into place without damaging the oil seal lips. Reinstall and lightly tighten the housing-to-engine block and oil pan-to-housing bolts, then tighten them to the specified torque. Finally, reinstall the flywheel/driveplate. For camshaft oil seals, note that in a timing chain engine, sealing is provided by the valve cover gasket and timing chain cover gaskets.

When replacing the crankshaft seal, it is important to fill the grooves and crankcase seams with special Loctite sealant to prevent oil leaks. To begin, raise the vehicle and remove the splash shield underneath the engine. Next, remove the engine accessory belt and the vibration damper (front pulley), taking care not to remove the vibration damper hub bolt to avoid valve damage. Use BMW special tool 11 9 221 to push the crankshaft seal inward, loosening it for removal. Then, screw BMW special tool 11 O 371 into the seal and rotate it clockwise to pull out the seal. Clean the crankshaft seal seating surface and degrease the area around the crankcase seam. Lightly oil the sealing surface on the vibration damper hub. Attach BM special tool 119 232 to the hub and place the crankshaft seal and installation sleeve over the tool and crankcase opening. Coat the seal grooves with Loctite 171000 primer and ensure they center on the crankcase seam. Use BMW special tools 11 9 231 and 11 9 233 to press in the seal. Coat the seal grooves and crankcase seams with Loctite 171000 primer and fill them with Loctite 128357 sealant using an injector kit. Finally, coat the sealed areas with Loctite 171000 primer and reinstall the crankshaft vibration damper. The remaining assembly is the reverse of the disassembly process.

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.

Install the crankshaft protector cap using the special tool on the end of the crankshaft.

The first step is to remove the transmission.

Before installing the new oil seal, you should inspect the outer edge of the seal housing for nicks or sharp edges.

Coat the new seal with oil.

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.

Apply a thin coat of 3-Bond® 1209 or equivalent sealant to the oil pan gasket sealing surfaces, and lubricate the crankshaft and seal contact surfaces.