Engine - Piston Rings, Installation Procedure Update

BULLETIN NUMBER:
IB02-01-S004

ISSUE DATE:
APRIL 2002

GROUP:
ENGINE

6VD1 & 6VE1 # 1 PISTON RING INSTALLATION PROCEDURE UPDATE

AFFECTED VEHICLES
1998 through 2001 Isuzu vehicles equipped with 6VD1 or 6VE1 engines.

SERVICE INFORMATION





The procedure for replacing piston rings in affected vehicles has changed. Workshop manual indicates # 1 compression ring has a "T" mark on the "UP" side of the ring (Figure 1). Replacement rings (piston ring set, part # 8-97136135-0) do not contain the marking (Figure 2). The new # 1 replacement ring has identical taper on the upper and lower edges and can be installed in either direction. If old piston rings are re-used, all parts must be reinstalled in their original positions.





Both Factory installed and replacement # 2 compression rings are marked with a "2T". The "2T" mark must be facing up during installation (Figure 3).