Replacing radial seals in the front covers - RA01001202140X(01-2140)

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Preceding work:

Model 129: Open hood, raise to vertical position (01-0080)

Model 140: Radiator removed (20-4200) .

Fig 1: Identifying Viscous Fan, Shield Caps, High Voltage Distributor, Distributor Rotor And Radial Seal

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Only for right radial seal: viscous fan (20)	remove, install (20-3120) .
Shield caps (11, 14 and 15)	remove, install (steps 2 and 3).
High voltage distributor (12) with holder (13)	remove, install (15-3010) (steps 4 and 5).
Distributor rotor (6), screw (5), and follower (4)	remove, install (steps 6 and 7).
Guard cover (2) and seals (3)	remove, fit on (step 8).
Radial seals (1)	remove, install (steps 9 to 12).

TIGHTENING TORQUE SPECIFICATION

Distributor rotor to follower (reference value)	2.5
Follower to camshaft (Torx T30)	16

Special tools

Fig 2: Identifying Special Tool (001 589 72 21 00 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 3: Identifying Special Tool (103 589 01 14 00 01)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 4: Identifying Special Tool (000 589 01 10 00 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Shop-made tool

Sleeve for pressing on radial seal in front cover.

Fig 5: Identifying Shop-Made Tool Dimension

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Removing, installing

Only for right radial seal: remove viscous fan (20-3120) .
Pull shield cap (14) to the front, remove.
Unclip shield caps (11) and (15) at the side, remove.

Fig 6: Identifying Shield Caps
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Unscrew high voltage distributor (12) with ignition cables connected (15-3010) .
Remove screws (18), take off shield cap holder (13).
Installation notes

Model 140: Clip cable of TDC sensors (L1/1) and (L1/2) into left and right holders (13).

Left holder (13) : Clip oil lines (21) and (22) into holder (13) (arrow).

Model 129: Clip ignition cable 4 into right holder (13).

Model 129: Clip cable of TDC sensors (L1/1) and (L1/2) into left holder.

Fig 7: Identifying High Voltage Distributor, TDC Sensors And Oil Lines
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Unscrew distributor rotor (6) and remove. Tightening torque 2.5 Nm.

Fig 8: Identifying Distributor Rotor And Follower
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Remove screw (5) (Torx T30), take off follower (4).
Installation note

The slot of the follower (4) must engage in the locating pin (arrow) in the camshaft.

Tightening torque 16 Nm.
Remove guard cover (2) together with seal (3).

Fig 9: Identifying Follower
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Press out radial seal (1) with a screwdriver.

Do not damage camshaft and mounting hole for radial seal.

Use a clean cloth as a base.

Fig 10: Pressing Out Radial Seal With Screwdriver
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fit insertion sleeve (7) 103 589 01 14 00 onto camshaft.
Coat sealing lip of radial seal with engine oil.

Do not use grease! Grease prevents the sealing lip of the radial seal transporting back the engine oil.

Fig 11: Identifying Insertion Sleeve
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fit radial seal (1) onto insertion sleeve (7) 103 589 01 14 00 and press in flush (arrows) with sleeve (8) (shop-made).

The radial seal (1) must be vertical relative to the camshaft (10) to achieve proper sealing.
Install in the reverse order, beginning with step 8.

Fig 12: Identifying Radial Seal, Insertion Sleeve, Camshaft And Front Cover
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.