11 14 151 Replacing crankshaft radial seal on transmission side (N74)

Necessary preliminary tasks: 

• Drain off ENGINE OIL 
• Remove FLYWHEEL 

Release screws (1).

Unfasten screws (2).

Carefully remove end cover with crankshaft radial seal.

Fig 1: Identifying Screws

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If the crankshaft radial seal (1) is stored for more than six months without the support sleeve (2), its operational reliability will no longer be guaranteed.

Crankshaft radial seal (1) must not be reused in this eventuality! 

Support sleeve (2) remains in the crankshaft radial seal (1) and is used as a slip sleeve during subsequently described installation.

Fig 2: Identifying Support Sleeve And Radial Seal

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When the crankshaft radial seal is installed, only the support sleeve included in the scope of delivery may be used as a slip sleeve.

Fig 3: Do Not Use Special Tool 11 2 390 On Sealing Lip Of Crankshaft Radial Seal

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Installation: 

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

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

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

Fig 4: Identifying Dowel Sleeves, Sealing Face, And Drie Bond 1209 Application Areas

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Installation: 

Lightly oil running surface of crankshaft.

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

Fig 5: Identifying End Cover And Support Sleeve

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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: see 7AZ in 11 14 CASE COVERS

Assemble engine.

Fig 6: Identifying Bolts And Screws

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