Dodge Nitro. Manual — part 21

INSTALLATION

VALVES AND VALVE SPRINGS

Fig. 65: Valve Assembly Configuration
Courtesy of CHRYSLER LLC

1 - VALVE LOCKS (3-BEAD)

2007 Dodge Nitro R/T

2007 ENGINE 3.7L - Service Information - Nitro

1. Coat the valve stem with clean engine oil and insert it into the cylinder head.

2. 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.

3. Install the spring and the spring retainer.

4. Using the valve spring compressor, compress the spring and install the two valve spring retainer halves.

5. Release the valve spring compressor and make sure the two spring retainer halves and the spring retainer

are fully seated. See Fig. 65.

Fig. 66: Camshaft Bearing Caps Tightening Sequence
Courtesy of CHRYSLER LLC

2 - RETAINER
3 - VALVE STEM OIL SEAL
4 - INTAKE VALVE
5 - EXHAUST VALVE
6 - VALVE SPRING

2007 Dodge Nitro R/T

2007 ENGINE 3.7L - Service Information - Nitro

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. See Fig. 66.

8. Position the hydraulic lash adjusters and rocker arms. See INSTALLATION.

ARM-VALVE ROCKER

DESCRIPTION

VALVE ROCKER ARM

The rocker arms are steel stampings with an integral roller bearing. The rocker arms incorporate a 2.8 mm (0.5
inch) oil jet hole in the lash adjuster socket for roller and camshaft lubrication.

REMOVAL

VALVE ROCKER ARM

2007 Dodge Nitro R/T

2007 ENGINE 3.7L - Service Information - Nitro

Fig. 67: Removing/Installing Camshaft & Special Tool 8516
Courtesy of CHRYSLER LLC

1. Remove the cylinder head cover. See REMOVAL).

2. For rocker arm removal on cylinder No. 4, Rotate the crankshaft until cylinder No. 1 is at BDC intake

stroke.

3. For rocker arm removal on cylinder No. 1, Rotate the crankshaft until cylinder No. 1 is at BDC

combustion stroke.

1 - CAMSHAFT
2 - SPECIAL TOOL 8516

NOTE:

Disconnect the battery negative cable to prevent accidental starter engagement.

2007 Dodge Nitro R/T

2007 ENGINE 3.7L - Service Information - Nitro