Page 2105 of 5267
INSPECTION
The cylinder walls should be checked for out-of-round
and taper with Special Tool C-119 (1). If the cylinder
walls are badly scuffed or scored, the cylinder bore
can be machined oversize. Oversize piston and rings
are available.
Measure the cylinder bore at three levels in directions
A and B. Top measurement should be 12 mm (0.50
in.) down and bottom measurement should be 12 mm
(0.50 in.) up from bottom of bore. (Refer to 9 -
ENGINE - SPECIFICATIONS) for cylinder bore and
piston specifications.
Page 2106 of 5267
HYDRAULIC TAPPETS
DESCRIPTION
The roller type design hydraulic tappets (3) are posi-
tioned in the cylinder block. Roller tappet alignment is
maintained by machined flats on tappet body being fit-
ted in pairs into ten aligning yokes (2).
REMOVAL
1.Removecylinderhead(s)(Referto9-ENGINE/
CYLINDER HEAD - REMOVAL).
NOTE: If tappets (3) are to be reused, identify tap-
pet location to ensure installation in original loca-
tion.
2. Remove tappet aligning yoke bolt (1).
3. Remove tappets (3) from bores.
CAUTION: Do not disassemble tappets.
Page 2107 of 5267
INSTALLATION
1. Lubricate tappets.
2. Install tappets in their original positions with oil
holes (1) facing up.
CAUTION: The “handle” on the tappet aligning
yoke must be installed in the outboard position;
i.e. toward the cylinders.
3. With roller tappets in proper position, install align-
ing yoke assemblies. Apply Mopar
Lock & Seal
Adhesive (Medium Strength Threadlocker) to the
screwsandtightento11Nꞏm(95in.lbs.).
4. Install cylinder heads (Refer to 9 - ENGINE/CYLIN-
DER HEAD - INSTALLATION).
5. Start and operate engine. Warm up to normal oper-
ating temperature.
CAUTION: To prevent damage to valve mecha-
nism, engine must not be run above fast idle until
all hydraulic tappets have filled with oil and have
become quiet.
Page 2108 of 5267

CAMSHAFT
REMOVAL
1. Perform the fuel pressure relief procedure (Refer to
14 - FUEL SYSTEM/FUEL DELIVERY - STAN-
DARD PROCEDURE).
2. Disconnect the negative battery cable.
3. Raise and support the vehicle.
4. Remove the front engine shield.
5. Drain the cooling system
6. Drain the power steering fluid.
7. Remove the oil pan (Refer to 9 - ENGINE/LUBRI-
CATION/OIL PAN - REMOVAL).
8. Lower the vehicle.
9. Remove the radiator and radiator fan assembly
(Refer to 7 - COOLING/ENGINE/RADIATOR -
REMOVAL).
10. Remove intake manifold (Refer to 9 - ENGINE/
MANIFOLDS/INTAKE MANIFOLD - REMOVAL).
11. Remove cylinder head covers (Refer to 9 -
ENGINE/CYLINDER HEAD/CYLINDER HEAD
COVER(S) - REMOVAL).
12. Remove timing chain cover (Refer to 9 - ENGINE/
VALVE TIMING/TIMING CHAIN COVER - REMOVAL).
13. Remove rocker arm assemblies.
NOTE: Identify each push rod to be replaced in its original location.
14. Remove push rods.
15. Remove cylinder heads (Refer to 9 - ENGINE/CYLINDER HEAD - REMOVAL).
16. Remove hydraulic tappets (Refer to 9 - ENGINE/ENGINE BLOCK/HYDRAULICTAPPETS - REMOVAL).
17. Remove timing chain and camshaft sprocket (Refer to 9 - ENGINE/VALVE TIMING/TIMING CHAIN AND
SPROCKETS - REMOVAL).
18. Remove camshaft thrust plate (2).
19. Slowly remove camshaft (1). Use care not to damage camshaft bearing surfaces with the cam lobes.
Page 2109 of 5267

INSTALLATION
1. Lubricate camshaft lobes and camshaft bearing
journals.
2. Slowly install camshaft (1). Use care not to dam-
age camshaft bearing surfaces with the cam lobes.
3. Install camshaft thrust plate bolts (3).. Tighten to 24
Nꞏm (210 in. lbs.).
4. Install timing chain and camshaft sprocket (Refer to
9 - ENGINE/VALVE TIMING/TIMING CHAIN AND
SPROCKETS - INSTALLATION).
5. Measure camshaft end play. End Play should mea-
sure 0.0127 - 0.381 mm (0.005 - 0.015 in.) 0.381
mm (0.015 in. Max.). If not within limits, install a
new thrust plate.
6.When camshaft is replaced, all of the tappets
must be replaced.Each hydraulic tappet must be
installed with oil hole facing up (Refer to 9 -
ENGINE/ENGINE BLOCK/HYDRAULIC TAPPETS -
INSTALLATION).
7. Install timing chain cover (Refer to 9 - ENGINE/
VALVE TIMING/TIMINGCHAIN COVER - INSTAL-
LATION).
8. Install cylinder heads (Refer to 9 - ENGINE/CYLIN-
DER HEAD - INSTALLATION).
9. Install push rods in their original location.
10. Install rocker arms (Refer to 9 - ENGINE/CYLIN-
DER HEAD/ROCKER ARMS - INSTALLATION).
11. Install intake manifold (Refer to 9 - ENGINE/MAN-
IFOLDS/INTAKE MANIFOLD - INSTALLATION).
12. Install cylinder head covers (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - INSTAL-
LATION).
13. Install the radiator and fan assembly (Refer to 7 - COOLING/ENGINE/RADIATOR - INSTALLATION).
14. Raise and support the vehicle.
15. Install the oil pan (Refer to 9 - ENGINE/LUBRICATION/OIL PAN - INSTALLATION).
16. Install the front engine shield.
17. Lower the vehicle.
18. Fill and purge air from the power steering (Refer to 19 - STEERING/PUMP -STANDARD PROCEDURE).
19. Fill and purge air from the coolingsystem (Refer to 7 - COOLING - STANDARD PROCEDURE).
Page 2110 of 5267
20. Fill engine crankcase with the proper oil to the correct level (Refer to9 - ENGINE/LUBRICATION/OIL - STAN-
DARD PROCEDURE).
21. Connect the negative battery cable.
22. Start the vehicle and inspect for leaks.
Page 2111 of 5267

ROD-PISTON & CONNECTING
DESCRIPTION
The pistons are made of cast aluminum with an added anodized coating on bothsides of the skirt and the top
piston ring groove for reduced wear and it’s low friction properties. Three piston rings are used; two compression
and one three-piece oil control ring. The piston pin (press-fit into the rods) joins the piston to a forged steel, frac-
tured cap, designed connecting rod, with a custom twelve point nine millimeter threaded bolt. The piston and con-
necting rod is serviced as an assembly and is not interchangeable with previous model years.
STANDARD PROCEDURE
PISTON FITTING
All pistons are machined to the same weight in grams,
to maintain piston balance.
Piston and cylinder wall must be clean and dry. Piston
diameter should be measured 90 degrees to piston
pin axis at size location shown in. Cylinder bores
should be measured halfway down the cylinder bore
and transverse to the engine crankshaft center line
shown in. (Refer to 9 - ENGINE - SPECIFICATIONS)
for cylinder bore and piston specifications.
NOTE: Pistons and cylinder bores should be mea-
sured at normal room temperature, 70°F (21°C).
Page 2112 of 5267
MEASURING CONNECTING ROD SIDE CLEARANCE
1. Using a feeler gauge, check connecting rod side
clearance. (Refer to 9 - ENGINE - SPECIFICA-
TIONS) for connecting rod side clearance
specifications.
REMOVAL
NOTE: Pistons and connecting rods are to be
removed as an assembly from top of cylinder
block.
1. Remove engine (Refer to 9 - ENGINE - REMOVAL)
and place in a suitable engine stand.
2. Remove cylinder heads (Refer to 9 - ENGINE/CYL-
INDER HEAD - REMOVAL).
3. Remove oil pan (Refer to 9 - ENGINE/LUBRICA-
TION/OIL PAN - REMOVAL).
4. Remove the oil pump pick up tube (2)