Removing and installing oil pressure relief valve - RA18001202150X(18-2150)

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:

Open hood, raise to vertical position (01-0080) .

Bottom engine compartment panel removed

(Maint. Man. 6190).

Operation no. of the operation texts and work units or standard texts and flat rates:

18-5043

Model 129

Fig 1: Identifying Oil Pressure Relief Valve (Model 129)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Engine oil	drain, pour in, replace seal (40 Nm) (18-0020) .
Cable strap of electric cable of oil pressure sensor at bottom part of oil pan (8)	take off, fit on.
Bottom part of oil pan (8)	unbolt, bolt on (10 Nm).
Gasket (6)	replace according to condition.
Screw plug (5) of oil pressure relief valve, WAF 22	unscrew, screw on (50 Nm).
NOTE: The screw plug seals with a tapered seat (arrows). Spring (4), filler pin (3) and control piston (2) NOTE: The control piston (2) must move easily in the oil pump bore (1).	remove, install.

Preceding work:

Oil pan removed (01-3100) .

Model 140

Fig 2: Identifying Oil Pressure Relief Valve (Model 140)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Screw plug (5) of oil pressure relief valve WAF 22	unscrew, screw on (50 Nm).
NOTE: Screw plug (5) seals with tapered seat (arrows). Spring (4), filling pin (3) and control piston (2)	remove, install.
NOTE: The control piston (2) must move freely in the oil pump bore (1).