Dodge Ram Truck 1500-2500-3500. Manual — part 1324

6. Remove the spring retainer, and the spring.

NOTE: Check for sharp edges on the keeper grooves. Remove any burrs from the valve stem before remov-
ing the valve from the cylinder head.

7. Remove the valve from the cylinder head.

NOTE: The valve stem seals are common between intake and exhaust.

8. Remove the valve stem seal. Mark the valve for proper installation.

TESTING VALVE SPRINGS

NOTE: Whenever the valves are removed from the
cylinder head it is recommended that the valve
springs be inspected and tested for reuse.

Inspect the valve springs for physical signs of wear or
damage. Turn table of tool C-647 (1) until surface is in
line with the 40.12 mm (1.579 in.) mark on the
threaded stud and the zero mark on the front. Place
spring over the stud on the table and lift compressing
lever to set tone device. Pull on torque wrench until a
Ping is heard. Take reading on torque wrench at this
instant. Multiply this reading by two. This will give the
spring load at test length. Fractional measurements
are indicated on the table for finer adjustments. Refer
to Specifications Section to obtain specified height and
allowable tensions. Replace any springs that do not
meet specifications.

INSTALLATION

1. Coat the valve stem with clean engine oil and

insert it into the cylinder head.

2. Install the valve stem seal (3). make sure the seal

is fully seated and that the garter spring at the top
of the seal is intact.

3. Install the spring (6) and the spring retainer (2).

4. Using the valve spring compressor, compress the

spring (6) and install the two valve locks (1).

5. Release the valve spring compressor and make

sure the two valve locks and the spring retainer are
fully seated.

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ENGINE - 4.7L - SERVICE INFORMATION

DR/DH

6. lubricate the camshaft journal with clean engine oil

then Position the camshaft (with the sprocket dowel
on the left camshaft at 11 o’clock and the right
camshaft at 12 o’clock), then position the camshaft
bearing caps.

7. Install the camshaft bearing cap retaining bolts.

Tighten the bolts 9–13 N·m (100 in. lbs.) in

1

⁄

2

turn

increments in the sequence shown.

8. Position the hydraulic lash adjusters and rocker

arms.

ROCKER ARM - VALVE

DESCRIPTION

The rocker arms are steel stampings with an integral roller bearing. The rocker arms incorporate a 2.8 mm (0.11
inch) oil hole in the lash adjuster socket for roller and camshaft lubrication.

DIAGNOSIS AND TESTING - HYDRAULIC LASH ADJUSTER

A tappet-like noise may be produced from several items. Check the following items.

1. Engine oil level too high or too low. This may cause aerated oil to enter the adjusters and cause them to be

spongy.

2. Insufficient running time after rebuilding cylinder head. Low speed running up to 1 hour may be required.

3. Turn engine off and let set for a few minutes before restarting. Repeat this several times after engine has

reached normal operating temperature.

4. Low oil pressure.

5. The oil restrictor in cylinder head gasket or the oil passage to the cylinder head is plugged with debris.

6. Air ingested into oil due to broken or cracked oil pump pick up.

7. Worn valve guides.

8. Rocker arm ears contacting valve spring retainer.

9. Rocker arm loose, adjuster stuck or at maximum extension and still leaves lash in the system.

10. Oil leak or excessive cam bore wear in cylinder head.

11. Faulty lash adjuster.

a. Check lash adjusters for sponginess while installed in cylinder head and cam on camshaft at base circle.
Depress part of rocker arm over adjuster. Normal adjusters should feel very firm. Spongy adjusters can be bot-
tomed out easily.

b. Remove suspected lash adjusters, and replace.

c. Before installation, make sure adjusters are at least partially full of oil. This can be verified by little or no
plunger travel when lash adjuster is depressed.

DR/DH

ENGINE - 4.7L - SERVICE INFORMATION

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REMOVAL

NOTE: Disconnect the battery negative cable to
prevent accidental starter engagement.

1. Remove the cylinder head cover (Refer to 9 -

ENGINE/CYLINDER

HEAD/CYLINDER

HEAD

COVER(S) - REMOVAL).

2. For rocker arm removal on cylinders 3 and 5

Rotate the crankshaft until cylinder #1 is at TDC
exhaust stroke.

3. For rocker arm removal on cylinders 2 and 8

Rotate the crankshaft until cylinder #1 is at TDC
compression stroke.

4. For rocker arm removal on cylinders 4 and 6

Rotate the crankshaft until cylinder #3 is at TDC
compression stroke.

5. For rocker arm removal on cylinders 1 and 7

Rotate the crankshaft until cylinder #2 is at TDC
compression stroke.

6. Using special tool 8516 Rocker Arm Remover (2),

press downward on the valve spring, remove
rocker arm.

INSTALLATION

CAUTION: Make sure the rocker arms are installed with the concave pocket over the lash adjusters. Failure
to do so may cause severe damage to the rocker arms and/or lash adjusters.

NOTE: Coat the rocker arms with clean engine oil prior to installation.

1. For rocker arm installation on cylinders 3 and 5 Rotate the crankshaft until cylinder #1 is at TDC exhaust stroke.

2. For rocker arm installation on cylinders 2 and 8 Rotate the crankshaft until cylinder #1 is at TDC compression

stroke.

3. For rocker arm installation on cylinders 4 and 6 Rotate the crankshaft until cylinder #3 is at TDC compression

stroke.

4. For rocker arm installation on cylinders 1 and 7 Rotate the crankshaft until cylinder #2 is at TDC compression

stroke.

5. Using special tool 8516 press downward on the valve spring, install rocker arm.

6. Install the cylinder head cover (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) -

INSTALLATION).

SPRINGS-VALVE

DESCRIPTION

The valve springs are made from high strength chrome silicon steel. The springs are common for intake and
exhaust applications. The valve spring seat is integral with the valve stem seal, which is a positive type seal to
control lubrication.

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ENGINE - 4.7L - SERVICE INFORMATION

DR/DH

REMOVAL

1. Remove the cylinder head cover (Refer to 9 -

ENGINE/CYLINDER

HEAD/CYLINDER

HEAD

COVER(S) - REMOVAL).

2. Using Special Tool 8516 Rocker Arm Remover (2),

remove the rocker arms and the hydraulic lash
adjusters.

3. Remove the spark plug for the cylinder the valve

spring and seal are to be removed from.

4. Apply shop air to the cylinder to hold the valves in

place when the spring is removed

NOTE: All eight valve springs and seals are
removed in the same manner; this procedure only
covers one valve seal and valve spring.

5. Using Special Tool 8387 Valve Spring Compressor,

compress the valve spring.

NOTE: It may be necessary to tap the top of the
valve spring to loosen the spring retainers locks
enough to be removed.

6. Remove the two spring retainer lock halves.

NOTE: the valve spring is under tension use care when releasing the valve spring compressor.

7. Remove the valve spring compressor.

8. Remove the spring retainer, and the spring.

9. Remove the valve stem seal.

NOTE: The valve stem seals are common between intake and exhaust.

INSTALLATION

1. Coat the valve stem with clean engine oil and

install the valve stem seal. Make sure the seal is
fully seated and that the garter spring at the top of
the seal is intact.

2. Install the spring (6) and the spring retainer (2).

3. Using Special Tool 8387 Valve Spring Compressor,

compress the spring and install the two valve
spring retainer halves.

4. Release the valve spring compressor and make

sure the two spring retainer halves and the spring
retainer are fully seated.

5. Position the hydraulic lash adjusters and rocker

arms.

6. Install the cylinder head cover (Refer to 9 -

ENGINE/CYLINDER

HEAD/CYLINDER

HEAD

COVER(S) - INSTALLATION).

DR/DH

ENGINE - 4.7L - SERVICE INFORMATION

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