Vibration Damper; Second Compression Ring Identification; Compression Ring Chamfer Location; Top Compression Ring Identification - Dodge 2001 Ram 1500 Owner's Manual

9 - 42 ENGINE 3.9L
PISTON RINGS (Continued)
lower rails. Insert oil rail spacer first, then side
rails.
(b) Install the second compression rings using
Installation Tool C-4184. The compression rings
must be installed with the identification mark face
up (toward top of piston) and chamfer facing down.
An identification mark on the ring is a drill point,
a stamped letter "O", an oval depression, or the
word "TOP" (Fig. 41) (Fig. 43).
(c) Using a ring installer, install the top com-
pression ring with the chamfer facing up (Fig. 42)
(Fig. 43). An identification mark on the ring is a
drill point, a stamped letter "O", an oval depression
or the word "TOP" facing up.
(d) Measure side clearance between piston ring
and ring land. Clearance should be 0.074-0.097 mm
(0.0029-0.0038 in.) for the compression rings. The
steel rail oil ring should be free in groove, but
should not exceed 0.246 mm (0.0097 in.) side clear-
ance.
(e) Pistons with insufficient, or excessive, side
clearance should be replaced.
Fig. 41 Second Compression Ring Identification
1 - SECOND COMPRESSION RING (BLACK CAST IRON)
2 - CHAMFER
3 - TWO DOTS
(3) Orient the rings:
(a) Arrange top compression ring 90° counter-
clockwise from the oil ring rail gap (Fig. 44).
(b) Arrange second compression ring 90° clock-
wise from the oil ring rail gap (Fig. 44).

VIBRATION DAMPER

REMOVAL
(1) Disconnect the negative cable from the battery.
(2) Remove fan, and fan drive (Refer to 7 - COOL-
ING/ENGINE/FAN DRIVE VISCOUS CLUTCH -
REMOVAL).
(Typical)
Fig. 42 Top Compression Ring Identification
1 - TOP COMPRESSION RING (GRAY IN COLOR)
2 - CHAMFER
3 - ONE DOT
Fig. 43 Compression Ring Chamfer Location
1 - CHAMFER
2 - TOP COMPRESSION RING
3 - SECOND COMPRESSION RING
4 - PISTON
5 - CHAMFER
(3) Remove the accessory drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL).
(4) Remove the vibration damper pulley.
(5) Remove vibration damper bolt and washer from
end of crankshaft.
(6) Install bar and screw from Puller Tool Set
C-3688. Install two bolts with washers through the
puller tool and into the vibration damper (Fig. 45).
(7) Pull vibration damper off of the crankshaft.
INSTALLATION
(1) Position the vibration damper onto the crank-
shaft.
(2) Place installing tool, part of Puller Tool Set
C-3688, in position and press the vibration damper
onto the crankshaft (Fig. 46).
(Typical)
(Typical)
BR/BE