Dodge ram truck 3500 1996 Service Manual page 1018

I - 28 3.SL i ^ i h i
SEitWlCE ? R O £ £ D U R £ S (Continued)
lower ralk. Insert cll rail spacer first, then side
rails.
- c) Install the second compression rings using
Installation Tool 0-4184. 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. 8) (Fig. 10).
(c) Using a ring installer, install the top com­
pression ring with - the chamfer facing up (Fig. 9)
(Fig. 10). 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.
SECOND COMPRESSION RING
( B L A C K
CAST IRON)
CHAMFER
TWO
DOTS
J9009-46
Fig, 8 Second Compression Ring identification
(Typical)
^^5Nv
TOP
COMPRESSION
R I N G
X \ % \ (GRAY IN COLOR)
x * - > \ 'Ox.
CHAMFER
J9009-48
Fig, 9 Top Compression Ring Identification (Typical)
(3) Orient the rings:
(a) .Arrange top compression ring 90° counter­
clockwise from the oil ring rail gap (Fig. 11).
CHAMFER
\
TO? COMPRESSION
RING
/
:HAMFER
PISTON
SECOND
COMPRESSION
RING
J 9 4 0 9 - 3 7
Fig, 10 Compression Ring Chamfer Location
(Typical)
(b) Arrange second compression ring 90° clock­
wise from the oil ring rail gap (Fig. 11).
OIL RING
SPACER GAP
TOP
COMPRESSION
RING GAP
SECOND
COMPRESSION
RING GAP
OIL RING RAIL
GAP (TOP)
OIL RING RAIL
GAP (BOTTOM)
J9309-80
Fig, 11 Proper Ring Installation
CONNECTING ROD BEARINGS
Fit all rods on a bank until completed. DO NOT
alternate from one bank to another, because connect­
ing rods and pistons are not interchangeable from
one bank to another.
The bearing caps are not interchangeable and
should be marked at removal to ensure correct
' assembly.
Each bearing cap has a small V-groove across the
parting face. When installing the lower bearing shell,
be certain that the V-groove in the shell is in line
with the 'V-groove in the cap. This provides lubrica­
tion of the cylinder wall in the opposite bank.
The bearing shells must be installed so that the
tangs are in the machined grooves in the rods and
caps.
Limits of taper or out-of-round on any crankshaft
journals should be held to 0.025 mm (0.001 in.).
Bearings are available in 0.025 mm (0.001 in.), 0.051
mm (0.002 in.), 0.076 mm (0.003 in.), 0.254 mm
(0.010 in.) and 0.305 mm (0.012 in.) undersize.
Install the bearings in pairs. DO NOT use a new