Dodge Nitro. Manual — part 30

Fig. 91: Removing/Installing Rocker Arm
Courtesy of CHRYSLER LLC

1. Remove rocker arms and lash adjusters. See REMOVAL.

2. Remove the camshaft bearing caps and the camshaft.

1 - CAMSHAFT
2 - VALVE SPRING COMPRESSOR 10102

NOTE:

The cylinder heads must be removed in order to perform this procedure.

NOTE:

All valve springs and valves are removed in the same manner; this

2007 Dodge Nitro R/T

2007 ENGINE 3.7L - Service Information - Nitro

3. Using Valve Spring Compressor C-3422-B or C-3422-C and Adapter 8519, compress the valve spring.

4. Remove the two spring retainer lock halves.

5. Remove the valve spring compressor.

6. Remove the spring retainer, and the spring.

7. Remove the valve from the cylinder head.

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

TESTING VALVE SPRINGS

procedure only covers one valve and 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.

NOTE:

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

NOTE:

Check for sharp edges on the keeper grooves. Remove any burrs from the
valve stem before removing the valve from the cylinder head.

NOTE:

The valve stem seals are common between intake and exhaust.

2007 Dodge Nitro R/T

2007 ENGINE 3.7L - Service Information - Nitro

Fig. 92: Testing Valve Spring
Courtesy of CHRYSLER LLC

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
to obtain specified height and allowable tensions. Replace any springs that do not meet specifications.

1 - SPECIAL TOOL C-647

NOTE:

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

2007 Dodge Nitro R/T

2007 ENGINE 3.7L - Service Information - Nitro

INSTALLATION

VALVES AND VALVE SPRINGS

Fig. 93: Valve Assembly Configuration
Courtesy of CHRYSLER LLC

1 - VALVE LOCKS (3-BEAD)

2007 Dodge Nitro R/T

2007 ENGINE 3.7L - Service Information - Nitro