Engine - Piston Ring Replacement

Cars

Section:
2

Group:
21

No.:
0050

Year:
04

Month:
04

Reference:

This service bulletin is a complement to service bulletins 21-0040, 21-0041 and 21-0042. This Service Bulletin applies to three different subscriptions. The Service Bulletin must be inserted in the relevant subscription systems.

Vehicles involved:
Vehicles with 4, 5 and 6-cylinder engines.

Piston rings, Replacing

Background

Certain piston ring kits stocked by Parts do not contain the latest design of rings These rings must be replaced before the pistons are installed in the engine.

Materials

Description

See tables, below.








Cylinder Liner and Piston Tables

Changing piston rings

Piston rings, installing 1

Use a piston ring expander.





Turn the piston rings so that the gaps are offset relative to each other as illustrated.

A. Compression ring. Text on ring should face upward.

B. Scraper ring. Chamfered edge should face downward.

C. Oil ring. Consists of three separate rings, each with identical sides.

First fit the corrugated expander ring (C) with the other two plain rings on either side. Then fit rings (A) and (B) in their respective grooves.

Caution!
Ensure that the rings are free to move in their grooves.

Note!
Incorrect installation may result in higher oil consumption.





WARRANTY STATEMENT:
Claims may be submitted under the New Car Warranty when there is a documented customer complaint, using claim type 01.