Emission System: Removal & Installation Jeep Commander I

REMOVAL - 3.7L

The PCV valve is located at the rear of the left cylinder head.

Scheme 9

1. Remove line (1) and rubber connector hose from PCV valve.
2. Unthread PCV valve (3) from metal fitting (2).

INSTALLATION - 3.7L

1. Check condition of PCV valve rubber O-ring (2).
2. Clean fitting (2).
3. Install PCV valve (3) into fitting (2).
4. Install PCV line (1) and rubber connector to valve.

Scheme 10

The 4.7L V-8 engine is equipped with a closed crankcase ventilation system. The Positive Crankcase Ventilation (PCV) valve (6) is mounted to the oil filler housing (4).

The PCV valve is sealed to the oil filler housing with an O-ring (1).

Scheme 11

Two interconnected breathers (1) threaded into the rear of each cylinder head are used with the system.

The system also includes the air cleaner housing and various tubes and hoses to connect the system components.

Scheme 12

The 5.7L V-8 engine is equipped with a closed crankcase ventilation system and a Positive Crankcase Ventilation (PCV) valve.

A PCV valve (4) mounted into the top of the intake manifold (1), located to the right/rear of the throttle body (2) is used.

Scheme 13

The PCV valve (1) is sealed to the intake manifold with two O-rings (2).

The system also consists of passages in the intake manifold, and various tubes and hoses to connect the system components.

REMOVAL

The ESIM (EVAP System Integrity Monitor) switch is attached to the EVAP canister and is usually not serviceable. Replace the switch by replacing the EVAP canister. Refer to VAPOR CANISTER removal/installation.

If servicing separately, refer to the following

Scheme 14

The ESIM switch (2) is located on the EVAP canister (1) The illustration displays a typical EVAP Canister and a typical ESIM switch.

Scheme 15

Scheme 16

Scheme 17

1. Remove both plastic lines from switch by folding line tabs (2).
2. Disconnect electrical connector at switch.
3. Clean any dirt from ESIM switch and its lines.
4. A lock tab (see arrow in illustration) is used on the back of the switch. Push lock tab towards switch while rotating switch counterclockwise 1/4 turn for removal.
5. The fresh air lines and hoses from the ESIM must have a clear opening to the atmosphere. Check the fresh air lines, including the fresh air filter, for obstructions or restrictions at the ESIM. Also check the routing to the exit to atmosphere. If a restriction is present, the system will not allow free flow passage of clean air, and an early shut off of the fuel fill nozzle may occur during fuel fill.

INSTALLATION

The following illustrations display a TYPICAL EVAP Canister and a typical ESIM switch. After installing any ESIM switch, the electrical connector on the switch must be in the 3 O'clock position. This step must be done for proper ESIM switch operation.

1. The fresh air lines and hoses from the ESIM must have a clear opening to the atmosphere. Check the fresh air lines, including the fresh air filter, for obstructions or restrictions at the ESIM. Also check the routing to the exit to atmosphere. If a restriction is present, the system will not allow free flow passage of clean air, and an early shut off of the fuel fill nozzle may occur during fuel fill.
2. Be sure O-ring (2) and EVAP canister opening are clean. 1 - EVAP Canister 2 - ESIM Switch 3 - Electrical Connector CAUTION: The electrical connector (3) on the ESIM switch must be in 3 O'clock position after installation. This step must be done for proper switch operation.
3. Position ESIM switch (2) into EVAP canister (1) and rotate until electrical connector is in 3 O'clock position (3).
4. Connect electrical connector.
5. Connect plastic lines to ESIM switch.

1. Position a new metal gasket between cylinder head (1) and valve assembly (3).
2. Install two mounting bolts (2) and tighten to 20 ft. lbs. (27 N.m).
3. Clean EGR tube where it joins EGR valve.
4. Position new gasket between EGR tube flange and EGR valve assembly.
5. Install two bolts (3) connecting EGR tube (4) to valve assembly (2). Tighten bolts to 20 ft. lbs. (27 N.m).
6. Connect electrical connector (1) to EGR solenoid (2).
7. Position generator to generator mounting bracket.
8. Install generator mounting bolts. Tighten generator mounting bolts to 30 ft. lbs. (41 N.m). CAUTION: Never force a belt over a pulley rim using a screwdriver. The synthetic fiber of the belt can be damaged. CAUTION: When installing a serpentine accessory drive belt, the belt MUST be routed correctly. The water pump may be rotating in the wrong direction if the belt is installed incorrectly, causing the engine to overheat. Refer to belt routing label in engine compartment, or refer to «ACCESSORY DRIVE»(ref-288235-S14966743812008062000000) .
9. Install accessory serpentine drive belt.
10. Install air resonator box above EGR valve/solenoid.
11. Connect negative battery cable to battery.
12. Using a diagnostic scan tool, erase any previously recorded DTC's (Diagnostic Trouble Codes).

Scheme 18

1. Disconnect the negative battery cable.
2. Remove engine cover.
3. Disconnect the EGR valve wiring harness connector.
4. Remove EGR valve retaining bolts and valve, discard the gasket.