Replacing piston rings - RA03001043170X(03-3170)

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:

Piston removed (03-3160) .

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

Fig 1: Identifying Plain Compression Ring, Taper-Faced Hook Scraper Ring And Double Bevelled Oil Control Ring

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Gap and end clearance of piston rings	measure, see table.
Piston rings	remove with pliers (10) 000 589 51 37 00.
Width of ring of piston rings	measure.
Piston rings	install only rings with identical ring width.
Installation position	note, "Top" faces up.
Hook spring (8) in oil scraper ring (3)	install offset 180° to joint (arrow).

Special tool

Fig 2: Identifying Special Tool (000 589 51 37 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

TEST DATA

Gap clearance of piston rings	groove 1	0.20 - 0.40
	groove 2	0.20 - 0.40
	groove 3	0.20 - 0.45
End clearance of piston rings	groove 1	0.015 - 0.050
	groove 2	0.020 - 0.040
	groove 3	0.010 - 0.045

NOTE: When replacing the piston rings, determine which pistons are installed.

When performing repairs, fit pistons only with the matching piston rings.