Galant L4-1997cc 2.0L SOHC 16 Valve (1993)
Piston Ring: Technical Service Bulletins
Engine - Piston Ring Modification
NO.: TSB-93-11-005
DATE: August, 1993
MODEL: Various (See Below)
SUBJECT:
DESIGN CHANGE TO # 1 PISTON RING
BACKGROUND INFORMATION
This bulletin describes a design change to the # 1 piston ring on 4G63 and 4G64 engines. Engines with these re-designed # 1 piston rings are used in
several 1993 vehicles built from 05/01/92.
AFFECTED VEHICLES
1993 Galant, 2.0L, 4G63 Engine (SOHC, DOHC, and DOHC Turbo)
1993 Eclipse, 2.0L, 4G63 Engine (DOHC, and DOHC Turbo)
1993 Expo/Expo LRV, 2.4L, 4G64 Engine
1993 Truck, 2.4L, 4G64 Engine
DESCRIPTION
The shape of the # 1 piston ring used on 1993 vehicles with 4G63 and 4G64 engines has been changed. Previously, the cross-view of the # 1 ring was a
flat rectangle. On vehicles built from 05/01/92, ALL 4G63 and 4G64 engines utilize a # 1 ring with a bevel on the interior (piston) side of the ring. This
is the same design already used for the # 1 ring on DOHC turbo engines.The design change is not applicable to vehicles built before 05/01/92.
INSTALLATION NOTE
