Removal and installation

Pcv valve-4.7L v-8 engine

The PCV valve is located on the oil filler tube (Fig.

20). Two locating tabs are located on the side of the valve (Fig. 20). These 2 tabs fit into a cam lock in the oil filler tube. An o-ring seals the valve to the filler tube.

REMOVAL

(1) Disconnect PCV line/hose (Fig. 20) by disconnecting rubber hose at PCV valve fitting.

(2) Remove PCV valve at oil filler tube by rotating PCV valve downward (counter-clockwise) until locating tabs have been freed at cam lock (Fig. 20). After tabs have cleared, pull valve straight out from filler tube. To prevent damage to PCV valve locating tabs, valve must be pointed downward for removal. Do not force valve from oil filler tube.

(3) After valve is removed, check condition of valve o-ring (Fig. 20).

Fig. 20 PCV Valve/Oil Filler Tube Location

1 - O-RING

2 - LOCATING TABS

3 - CAM LOCK

4 - OIL FILLER TUBE

5 - PCV LINE/HOSE

6 - PCV VALVE

INSTALLATION

(1) Return PCV valve back to oil filler tube by placing valve locating tabs (Fig. 20) into cam lock.

Press PCV valve in and rotate valve upward. A slight click will be felt when tabs have engaged cam lock.

Valve should be pointed towards rear of vehicle.

(2) Connect PCV line/hose and rubber hose to PCV valve

Evaporation (evap) canister

The EVAP canister is located below the vehicle, inside the left frame rail, in front of the fuel tank (Fig. 21).

REMOVAL

(1) Raise vehicle.

(2) Disconnect vacuum lines at EVAP canister.

Note location of lines before removal.

(3) Remove canister mounting nut.

Fig. 21 EVAP Canister Location

1 - LEFT FRAME RAIL

2 - RUBBER GROMMETS (2)

3 - LOCATING PINS (2)

4 - EVAP CANISTER

5 - MOUNTING NUT

6 - MOUNTING BRACKET

(4) Remove canister from mounting bracket.

INSTALLATION

(1) Position canister locating pins into mounting bracket grommets (Fig. 21) and install mounting nut.

(2) Tighten mounting nut to 17-24 N*m (150-210 in. lbs.) torque.

(3) Connect vacuum lines at canister.

(4) Lower vehicle

Duty cycle evap canister purge solenoid

The duty cycle EVAP canister purge solenoid is located at the left-rear side of engine compartment near power brake vacuum unit (Fig. 22).

REMOVAL

(1) Disconnect electrical wiring connector at solenoid (2) Disconnect vacuum harness at solenoid.

(3) Remove 2 support bracket mounting nuts.

(4) Remove solenoid and its support bracket from vehicle.

INSTALLATION

(1) Position EVAP canister purge solenoid and its mounting bracket.

(2) Install mounting nuts and tighten to 8 N*m (75 in. lbs.) torque.

(3) Connect vacuum harness and wiring connector.

Fig. 22 Duty Cycle EVAP Canister Purge Solenoid

1 - BRACKET NUTS (2)

2 - EVAP CANISTER PURGE SOLENOID

3 - EVAP SYSTEM TEST PORT (IF EQUIPPED)

4 - VACUUM LINES

5 - ELECTRICAL CONNECTOR

Rollover valve(s)

Two rollover valves are used. One of the valves is permanently mounted to top/rear of fuel tank (Fig.

23). If replacement of this particular valve is necessary, the fuel tank must be replaced. Refer to Fuel Tank Removal/Installation in Group 14, Fuel System.

The other rollover valve is located on top of the fuel pump module (Fig. 23). This valve may be serviced separately. Refer to following steps for procedures.

Fig. 23 Rollover Valve Locations

1 - FUEL PUMP MODULE

2 - FRONT ROLLOVER VALVE

3 - FUEL FILTER/FUEL PRESSURE REGULATOR

4 - FUEL TANK

5 - EVAP LINE

6 - REAR ROLLOVER VALVE

REMOVAL

WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE (EVEN WITH THE ENGINE OFF).

REFER TO FUEL PRESSURE RELEASE PROCEDURE IN GROUP 14, FUEL SYSTEM.

(1) Disconnect negative battery cable at battery.

(2) Remove fuel filler cap and drain fuel tank.

(3) Remove fuel tank. Refer to Fuel Tank Removal/ Installation in Group 14, Fuel System.

(4) Disconnect tube (line) at valve.

(5) The rollover valve is seated into a rubber grommet.

Remove valve by prying one side upward and then roll valve out of grommet.

(6) Discard old grommet.

INSTALLATION

(1) Install new grommet into fuel pump module.

(2) Using finger pressure only, press valve into place.

(3) Install fuel tank. Refer to Fuel Tank Installation.

(4) Fill fuel tank. Install fuel tank filler cap.

(5) Connect negative battery cable.

(6) Start vehicle and check for leaks.

Leak detection pump (ldp)

The LDP is located in the engine compartment under the battery tray and Power Distribution Center (PDC) (Fig. 24). The LDP filter is attached to the outside of battery tray (Fig. 25). The LDP and LDP filter are replaced (serviced) as one unit.

REMOVAL

(1) Disconnect negative battery cable at battery.

(2) Remove battery. Refer to Group 8A, Battery for procedures.

(3) Carefully disconnect rubber hose from bottom of LDP filter (Fig. 25).

(4) Remove clip retaining LDP filter to battery tray (Fig. 25) and remove filter from tray.

(5) Disconnect battery temperature sensor pigtail wiring harness at bottom of battery tray.

(6) To gain access to LDP, the PDC must be partially removed. Remove PDC-to-fender mounting screw at rear of PDC. Unsnap PDC from battery tray. To prevent damage to PDC wiring, carefully position PDC to gain access to LDP.

(7) Remove battery tray. Refer to Group 8A, Battery for procedures.

(8) Carefully remove vapor/vacuum lines at LDP.

(9) Disconnect electrical connector at LDP.

Fig. 24 Leak Detection Pump (LDP) Location

1 - BATTERY

2 - LEAK DETECTION PUMP (LDP)

Fig. 25 LDP Filter Location

1 - LDP FILTER

2 - LDP FILTER-TO-LDP HOSE

3 - BATTERY TRAY

4 - LDP MOUNTING CLIP

(10) Remove 3 LDP mounting screws (Fig. 26) and remove LDP from vehicle.

INSTALLATION

(1) Install LDP to bottom of battery tray. Tighten screws to 1 N*m (11 in. lbs.) torque.

(2) Carefully install vapor/vacuum lines to LDP.

Fig. 26 Leak Detection Pump (LDP) Mounting Screws

1 - BATTERY TRAY

2 - LDP

3 - LDP MOUNTING SCREWS (3)

The vapor/vacuum lines and hoses must be firmly connected. Check the vapor/vacuum lines at the LDP, LDP filter and EVAP canister purge solenoid for damage or leaks. If a leak is present, a Diagnostic Trouble Code (DTC) may be set.

(3) Connect electrical connector to LDP.

(4) Install battery tray. Refer to Group 8A, Battery for procedures.

(5) Install PDC to fender and battery tray (snaps on to battery tray).

(6) Install LDP filter to battery tray (one clip).

(7) Install connecting hose to bottom of LDP filter.

(8) Connect battery temperature sensor pigtail wiring harness.

(9) Install battery. Refer to Group 8A, Battery for procedures.

(10) Connect negative battery cable to battery.

Specifications

TORQUE CHART

Description - Torque

EVAP Canister Mounting Nut . . . . . . . . 17-24 N*m (150-210 in. lbs.)

EVAP Canister Purge Solenoid Mounting Bolt . . . . . . . . . . . . . . . . . . . . 11 N*m (95 in. lbs.)

Leak Detection Pump (LDP) Mounting Screws . . . . . . . . . . . . . . . . . . 1 N*m (11 in. lbs.)