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Home >> BMW >> 2014 >> M6 2D Convertible, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Crankshaft Seal, Timing Case Cover, Engine Oil Pan, Crankcase Ventilation System - Repair - F12 >> Crankshaft Seal, Timing Case Cover >> 11 14 151 Replacing the crankshaft seal on the transmission side (N63O1)

11 14 151 Replacing the crankshaft seal on the transmission side (N63O1)

IMPORTANT: The crankshaft seal can only be replaced completely with the end cover.
The crankshaft seal is an integral part of the end cover and cannot be replaced individually.

Necessary preliminary work: 

Release screws (1).

Unfasten screws (2).

Carefully remove end cover with crankshaft seal.

Fig 1: Identifying End Cover Screws
G10041946Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Support bush (2) is included in delivery specification.
If the crankshaft seal (1) is stored for more than six months without the support sleeve (2), its operational reliability will no longer be guaranteed.
Crankshaft seal (1) must not be reused in this case! 
Support bush (2) remains in the crankshaft seal (1) and is used as a slip bush during described installation described below.
Fig 2: Identifying Support Bush And Crankshaft Seal
G10041947Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: The sealing lip of the crankshaft seal (1) is very sensitive and must not be kinked.

Installation note: 

Check fitting sleeves (1) for damage and correct installation position.

Clean sealing surface (2) so that it is free from oil and grease.

Coat contact edges on separating face along oil sump (see arrows in illustration) with DREI BOND 1209 2.1 .

Fig 3: Identifying Fitting Sleeves And Sealing Surface
G10041948Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Lightly oil running surface of crankshaft.

Fit end cover (1) with support bush (2) on crankshaft and push on carefully.

NOTE: Illustration (N62TU).
Fig 4: Identifying Support Bush And End Cover
G10041949Courtesy of BMW OF NORTH AMERICA, INC.

Insert screws (2) and initially tighten without play.

Insert screws (1) and initially tighten without play.

Tighten down bolts (2) from inside outwards.

Tighten down screws (1) from inside outwards.

Tightening torque 11 14 4AZ . See N63O1 OIL SUMP and N63O1 CASE COVERS .

Fig 5: Identifying End Cover Screws
G10041950Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

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