Dodge RAM TRUCK 1500 1995 Service Manual page 946

9 - 102 5.9L ENGINE
S E C O N D C O M P R E S S I O N R I N G
(BLACK CAST IRON)
CHAMFER
(3) Arrange r i n g gaps 180° apart as shown i n F i g .
T W O
DOTS
J9009-46
Fig. 2 Second Compression Ring Identification
(Typical)
(c) Using a r i n g installer, install the top compres­
sion r i n g w i t h the chamfer facing u p (Fig. 3). A n
identification m a r k on the r i n g is a d r i l l point, a
stamped letter O , an oval depression or the word
T O P facing up.
TOP C O M P R E S S I O N R I N G
(GRAY I N COLOR)
CHAMFER
J9009-48
Fig. 3 Top Compression Ring Identification (Typical)
CHAMFER
V.PRESSION
. HG
. .1
SECOND
* C O M P R E S S I O N
R I N G
* PISTON J9409-37
Fitx 4
Ion Ring Chamfer Location
(Typical)
(d) Measure side clearance between piston ring
and ring land. Clearance should be 0.074-0.097 mm
(0.0029-0.0038 inch) for the compression rings. The
steel rail oil ring should be free in groove, but
should not exceed 0.246 mm (0.0097 inch) side
clearance.
(e) Pistons with insufficient or' excessive side
clearance should be replaced.
5.
OIL RING
SPACER GAP
. TOP
COMPRESSION
RING GAP
SECOND
COMPRESSION
RING GAP
OIL RING RAIL
GAP (TOP)
OIL
R I N G
RAIL
GAP (BOTTOM) J 9 3 0 9 - 8 0
Fig. S Proper Ring Installation
CONNECTING ROD BEAMINGS
Fit all rods on a bank until completed. DO NOT al­
ternate from one bank to another, because connecting
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 as­
sembly.
Each bearing cap has a small V-groove across the
parting face. When installing the lower bearing shell,
make 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 m m (0.001
inch).
Bearings are available in 0.025 m m (0.001 inch),
0.051 m m (0.002 inch), 0.076 m m (0.003 inch), 0.254
m m (0.010
inch) and
0.305 m m (0.012
inch) under­
size. Install the bearings in pairs. DO NOT use a
new bearing half with an old bearing half* DO
NOT file t h e rods or bearing caps.
INSTALLATION
(1) Be sure that compression ring gaps are stag­
gered so that neither is in line with oil ring rail gap.
(2) Before installing the ring compressor, make
sure the oil ring expander ends are butted and the
rail gaps located properly (Fig. 5).
(3) Immerse the piston head and rings in clean en­
gine oil. Slide Piston Ring Compressor Tool C-385
over the piston and tighten with the special wrench
(part of Tool C-385). Be sure position of rings
does not change during this operation.