Dodge RAM TRUCK 1500 1995 Service Manual page 886

S - 41 3 J L ENGINE
SECOND C O M P R E S S I O N mm
(BLACK CAST IROHf
CHAMFSi
i
DOTS
?00f-46
Fig, 14 Second Compression Ring identification
(Typical)
TOP
COMPRESSION
R I N G
(GRAY IN COLOI)
ONE
DOT
. J9009-48
Fig, 15 Top Compression Ring Identification
(Typical)
r y A M P P i
TOP COMPRESSION
CHAMFER ^
! N G
SECOND
- C O M P R E S S I O N
RING
, "PISTON J9409-37
i Compression Ring Chamfer Location
(Typical)
steel rail oil ring should be free in groove, but
should not exceed 0.248 mm (0.0097 Inch) side
clearance.
(e) Pistons with Insufficient or excessive side
clearance should be replaced.
(8) Arrange ring gaps 130° apart as shown in Fig.
17.
CONNECTING R O D BEARINGS
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.
TOP
COMPRESSION
RING GAP
^ SECOND
COMPRESSION
RING GAP
OIL RING RAIL
GAP (TOP)
OIL R I N G RAIL
GAP (BOTTOM) J9309-80
Fig. 17 Proper Ring Installation
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 mm (0.001 inch).
Bearings are available in 0.025 mm (0.001 Inch),
0.051 mm (0.002 inch), 0.078 mm (0.003 inch), 0.254
mm (0.010 inch) and 0.305 mm (0.012 inch) under-
size. Install the bearings in pairs. DO NOT use a
new bearing half with, a n old bearing half. BO
NOT file the rods or bearing caps*
(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. 17).
(3) Immerse the piston head and rings In clean en­
gine oil. Slide Piston Ring Compressor Tool 0-885
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.
(4) Install connecting rod bolt protectors on rod
bolts, the long protector should be installed on the
numbered side of the connecting rod.
(5) Rotate crankshaft so that the connecting rod
journal is on the center of the cylinder bore. Be sure
connecting rod and cylinder bore number are the
same. Insert rod and piston into cylinder bore and
guide rod over the crankshaft journal.