Dodge Nitro. Manual — part 140

INSPECTION

EXHAUST MANIFOLD

1. Inspect exhaust manifolds for damage or cracks.

2. Check manifold flatness.

3. Inspect the exhaust manifold gasket for obvious discoloration or distortion.

4. Check distortion of the cylinder head mounting surface with a straightedge and thickness gauge.

INSTALLATION

MANIFOLD-EXHAUST LEFT

Fig. 289: Left Exhaust Manifold
Courtesy of CHRYSLER LLC

2007 Dodge Nitro R/T

2007 ENGINE 4.0L - Service Information - Nitro

1. Position the exhaust manifold (7) and gasket (1). Install the retaining bolts (2). Tighten 4 bolts starting at

the center working outward to 23 N.m (200 in. lbs.).

2. Install the exhaust manifold heat shields (5,6). Tighten the bolts to 12N.m (105 in. lbs.).

3. Tighten the out most stud nuts to 8N.m (73 in.lbs.).

4. Connect the oxygen sensor.

Fig. 290: Removing/Installing Exhaust Pipe
Courtesy of CHRYSLER LLC

5. Raise and support the vehicle.

6. Connect the exhaust pipe to manifold union (2). Tighten the exhaust stud nuts to 34N.m (300 in.lbs.).

7. Connect the negative battery cable.

MANIFOLD-EXHAUST RIGHT

REMOVAL

1 - GASKET
2 - STUD
3 - NUT
4 - BOLT
5 - UPPER HEAT SHIELD
6 - LOWER HEAT SHIELD
7 - EXHAUST MANIFOLD

NOTE:

If replacing the exhaust manifold, tighten the exhaust outlet studs to manifold
to 40N.m (350 in.lbs.).

2007 Dodge Nitro R/T

2007 ENGINE 4.0L - Service Information - Nitro

MANIFOLD-EXHAUST RIGHT

Fig. 291: Removing/Installing Exhaust Pipe
Courtesy of CHRYSLER LLC

1. Disconnect the negative battery cable.

2. Disconnect the upstream oxygen sensor electrical connector.

3. Raise and support the vehicle.

4. Remove the exhaust manifold to exhaust pipe flange retaining bolts (2).

2007 Dodge Nitro R/T

2007 ENGINE 4.0L - Service Information - Nitro

Fig. 292: Right Exhaust Manifold
Courtesy of CHRYSLER LLC

5. Lower the vehicle.

6. Remove the exhaust manifold heat shield and manifold.

7. Remove the oxygen sensor from the exhaust manifold.

INSTALLATION

1 - GASKET
2 - MANIFOLD
3 - LOWER SHIELD
4 - UPPER SHIELD
5 - BOLT

2007 Dodge Nitro R/T

2007 ENGINE 4.0L - Service Information - Nitro