Dodge Nitro. Manual - part 614

Lower exhaust smoke density  

Improved operating economy  

Altitude compensation  

Noise reduction.  

The turbocharger is lubricated by engine oil that is pressurized, cooled, and filtered. The oil is delivered to the 
turbocharger by a supply line (2) that is tapped into the engine block. The oil travels into the bearing housing, 
where it lubricates the shaft (1) and bearings. See Fig. 16. A return pipe (3) at the bottom of the bearing 
housing, routes the engine oil back to the crankcase. 

The most common turbocharger failure is bearing failure related to repeated hot shutdowns with inadequate 
"cool-down" periods. A sudden engine shut down after prolonged operation will result in the transfer of heat 
from the turbine section of the turbocharger to the bearing housing. This causes the oil to overheat and break 
down, which causes bearing and shaft damage the next time the vehicle is started. 

Letting the engine idle after extended operation allows the turbine housing to cool to normal operating 
temperature. The following chart should be used as a guide in determining the amount of engine idle time 
required to sufficiently cool down the turbocharger before shut down, depending upon the type of driving and 
the amount of cargo. 

REMOVAL 

REMOVAL 

TURBOCHARGER "COOL DOWN" CHART 

Driving 

Load 

Turbocharger 

Idle Time (in minutes) 

Condition 

-

Temperature 

Before Shut Down 

Stop & Go

Empty

Cool

Less than 1

Stop & Go

Medium

Warm

1

Highway Speeds

Medium

Warm

2

City Traffic

Max. GCWR

Warm

3

Highway Speeds

Max. GCWR

Warm

4

Uphill Grade

Max. GCWR

Hot

5

 

2007 Dodge Nitro R/T 

2007 ENGINE Exhaust System And Turbocharger - Nitro

  

Fig. 17: Exhaust Manifold And Turbocharger Assembly 
Courtesy of CHRYSLER LLC 

 

2007 Dodge Nitro R/T 

2007 ENGINE Exhaust System And Turbocharger - Nitro

  

1. Disconnect negative battery cable.  

2. Disconnect the MAF and Inlet air pressure sensors wiring harness connectors, disconnect the air outlet 

duct from the turbocharger, and remove air cleaner assembly. Refer to REMOVAL .  

3. Remove charge air cooler inlet hose from turbocharger. See REMOVAL.  

4. Drain cooling system.  

5. Remove coolant recovery pressure container. Refer to REMOVAL .  

6. Disconnect the turbocharger actuator vacuum hose and position aside.  

7. Remove turbocharger upper heat shield.  

8. Raise and support the vehicle.  

9. Remove the lower splash shield.  

10. Disconnect the front exhaust pipe from the turbocharger.  

11. Remove the turbocharger support bracket.  

12. Disconnect turbocharger oil return line at turbocharger.  

13. Lower the vehicle.  

14. Remove the turbocharger oil supply line.  

15. Remove turbocharger to exhaust manifold retaining nuts and separate turbocharger from exhaust 

manifold.  

CLEANING 

CLEANING 

All old gaskets should be inspected for any tears or signs of prior leakage. If any gaskets show such indications, 
they should be replaced with new gaskets. All gasket mating surfaces must be cleaned of old gasket material to 
produce a smooth and dirt free sealing surface for the new gasket. 

INSTALLATION 

INSTALLATION 

1. Connect turbocharger to exhaust manifold with new gasket. Torque retaining nuts to 32 N.m. 

1 - EGR VALVE MOUNTING STUDS
2 - EXHAUST MANIFOLD
3 - TURBOCHARGER TO EXHAUST MANIFOLD MOUNTING STUDS
4 - TURBOCHARGER ASSEMBLY
5 - TURBOCHARGER OIL RETURN FITTING ATTACHING BOLT
6 - TURBOCHARGER OIL RETURN FITTING
7 - OIL RETURN FITTING GASKET
8 - RETAINING NUT
9 - TURBOCHARGER TO EXHAUST MANIFOLD GASKET

 

2007 Dodge Nitro R/T 

2007 ENGINE Exhaust System And Turbocharger - Nitro

  

2. Install exhaust manifold and turbocharger assembly with new gasket in position on studs in cylinder head. 

Install retaining nuts and tighten to 36 N.m.  

3. Install thermostat housing. Refer to INSTALLATION .  

4. Install accessory drive belt. Refer to INSTALLATION .  

5. Raise vehicle on hoist.  

6. Connect turbocharger oil return line at turbocharger.  

7. Connect exhaust pipe at turbocharger downpipe.  

8. Lower vehicle from hoist.  

9. Connect oil supply line at turbocharger. Tighten banjo fitting to 24 N.m (18 ft. lbs.).  

10. Install exhaust manifold heat shield. Tighten retaining bolts to 24 N.m (18 ft. lbs.).  

11. Reposition EGR cooler and or EGR valve assembly on exhaust manifold. Tighten retaining nuts and bolt 

to 32.4N.m.  

12. Connect EGR pipe to EGR valve. Torque bolts to 32 N.m (24 ft. lbs.).  

13. Connect EGR cooler coolant hoses at cooler.  

14. Install coolant recovery pressure container. Refer to INSTALLATION .  

15. Refill cooling system. Refer to STANDARD PROCEDURE .  

16. Connect charge air cooler inlet hose at turbocharger.  

17. Install air cleaner assembly.  

18. Connect air inlet hose to turbocharger.  

19. Connect negative battery cable.  

CHARGE AIR COOLER AND PLUMBING 

DIAGNOSIS AND TESTING 

LEAKS 

NOTE:

After tightening the exhaust manifold to specification using a diagonal-
cross pattern, retrace the pattern checking the correct torque value again.

 

2007 Dodge Nitro R/T 

2007 ENGINE Exhaust System And Turbocharger - Nitro