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how to check egr valve on 2002 chev 6 0 chevy engine

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2002 Chevrolet Chevy Suburban – 4WD Intake Manifold Replacement Manual

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Removal Procedure Important: The intake manifold, throttle body, fuel rail, and injectors may be removed as an assembly. If not servicing the individual components, remove the manifold as a complete assembly. 1. Remove the throttle body. Refer to Throttle Body Assembly Replacement in Engine Controls – 4.8L, 5.3L, and 6.0L. 2. Remove the fuel injectors. Refer to Fuel Injector Replacement in Engine Controls – 4.8L, 5.3L, and 6.0L. 3. Disconnect the following electrical connectors: 4. Remove the knock sensor harness electrical connector from the intake manifold. 5. Set the electrical harness aside. <- Back Forward -> Document ID# 738735 2002 Chevrolet Chevy Suburban – 4WD Print – Manifold absolute pressure (MAP) sensor (1) – Knock sensor (2) – Exhaust gas recirculation (EGR) valve, if equipped. 6. If equipped, remove the following EGR pipe bolts: 7. If equipped, remove the EGR pipe with valve. 8. If equipped, remove the EGR pipe gasket from the exhaust manifold If equipped with vacuum assisted brakes, remove the vacuum brake booster hose from the rear of the intake manifold.

Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Operation/Check Sensor for Oil Contamination)

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2000-2002 Buick Century, Regal 2000-2001 Chevrolet Lumina 2000-2002 Chevrolet Impala, Monte Carlo 2000-2002 Pontiac Grand Prix 2000-2002 Oldsmobile Intrigue 1. Verify that the coolant is at proper level in the radiator and the coolant recovery bottle. If the coolant is low, add proper amount of 50/50 water and DEX-COOL® mixture. If the low coolant light operates properly, diagnose the cooling system for loss of coolant as outlined in SI. DO NOT proceed further with this bulletin. 2. Remove the low coolant level sensor. Refer to Coolant Level Module Replacement in the Engine Cooling sub-section. 3. With the key on, the engine off and the coolant level sensor disconnected from the vehicle wiring harness, observe the low coolant light: Subject: Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Operation/Check Sensor for Oil Contamination) Models: 2000-2002 Buick Century, Regal 2000-2001 Chevrolet Lumina 2000-2002 Chevrolet Impala, Monte Carlo 2000-2002 Pontiac Grand Prix 2000-2002 Oldsmobile Intrigue • Light is on — Chassis wiring or instrument cluster concern. Follow the appropriate diagnostic information in SI. • 4. With the key off, connect the coolant level sensor into the vehicle’s wiring harness. Connect a ground wire (1) to the battery negative terminal. Using a sharp probe (3) attached to the ground wire, ground the coolant sensor probe (2) as shown in the illustration. Make sure a good contact is made. With the key on and the engine off, observe the low coolant light for at least 15 seconds. 5. Using a small wire brush or emery cloth, polish the low coolant level sensor probe to remove any film or oxidation. The probe should be a bright brass color when finished. Use Brake Parts Cleaner to flush removed deposits from the low coolant sensor probe. Reinstall the low coolant sensor into the vehicle and proceed to Step 6. 6. Flush the cooling system and install new DEX-COOL® mixture as outlined in the SI. Check the vehicle’s warranty history to determine if any engine gasket had recently been changed. If there has not been a recent gasket replacement, locate and repair the source of the engine oil contamination

2003 BMW 525I 2.5L Check engine light on and fault codes stored Vehicle running normally

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1. Based upon stored fault codes for secondary air system, there is little or no flow of secondary air into engine. Typical causes for this issue are failed secondary air pumps and/or secondary air check valves. Secondary air pump should operate under normal circumstances when vehicle is first started to perform system test. Pump will normally be heard running when standing in front right corner of vehicle. 2. The secondary air pump is located in the right front of engine compartment. A secondary air pump relay located in the glove box is controlled by the engine control module and sends power to the secondary air pump. 3. Air pump can be disconnected and supplied with power and ground at pump to verify operation is possible. 4. Check valve on front right of cylinder head can be supplied with vacuum and visually checked for opening of valve. 5. Vacuum line from check valve to operating solenoid should also be inspected for cracks or being disconnected. Vacuum line follows right side of cylinder head to back of cylinder head to the secondary air solenoid located under left rear side of intake manifold. 6. The solenoid should allow vacuum flow to the check valve during vacuum pump operation. The solenoid is controlled directly by the engine control module and receives power during key-on-engine-off. Potential Causes: A.I.R. Check Valve Engine Control Module (ECM) Codes — Engine control module fault. Defective Secondary Air Pump Secondary Air Pump Relay Secondary Air Supply Hose Broken Vacuum Line Diagnostic Codes: P0491, P0492 Author: Robert Jacobs Average Reported Mileage: 69066

Engine And Transmission Crossmembers Installation Instructions

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instructions: 1. The engine and transmission crossmembers are available for a variety of Ford and Chevy V8s and trannys. They come powdercoated and include all necessary hardware. 2. After sliding the end collars over the main tube, position the engine crossmember on the frame. Here nothing needs to be welded or bolted because the crossmember ends will rest on the frame’s lower channel as the engine is positioned. Takes an educated guess on how far forward the cross- member will need to be (this will be adjusted as needed). 3. The engine is then lowered into the truck and bolted to the crossmember. Let most of the engine’s weight settle down onto the crossmember, but keep the hoist connected for extra support. At this point you can determine whether the engine needs to be slid forward or back, making sure to consider factors such as distributor-to-firewall clearance and engine-to-radiator fit. 4. At this point you’ll also want to mock the transmission cross member in place. Welding clamps or C-clamps work well to temporarily hold it in place. 5. While under the truck, center the transmission between the framerails. Sliding the crossmember side to side in the end collars makes it easy to adjust. Mark the frame where it will need to be drilled for mounting bolts. 6. Obviously, the engine also needs to be centered from side to side in the same manner. 7. An important consideration is the angle on which the engine is mounted. CPP recommends a 4-degree downward position (transmission tailshaft lower than the crankshaft snout), paired with a rearend pinion angle that’s 2-3 degrees upward when the vehicle is static. This allows for 1-2 degrees of rearend deflection under load, which will properly line up the pinion and tailshaft. Use a magnetic level on the valve cover to check the angle. The crossmember can be rotated slightly inside the end collars for adjustment. Generally, the proper engine angle will put the carburetor mounting pad parallel with the ground. 8. After getting the engine angle set, clamp the end collars to the frame and drills a hole through the collars and crossmember. Bolts secured through these holes will keep the crossmember from rotating or shifting inside the collars. (The collars can also be welded to the crossmember.) The same thing is done on the transmission crossmember. 9. Though it’s not really necessary, you may remove the engine and trans at this point to have more room to work while drilling holes and mounting the crossmember to the frame. Four bolts hold each end collar to the framerail. 10. Likewise, the transmission crossmember is secured to the bottom channels of the framerails using two bolts on each side

2002 Ford Lincoln LS Valve Cover LH Workshop Manual

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Valve Cover LH Removal 1. Disconnect the battery ground cable. For additional information, refer to Section 414-01 . 2. Remove the air cleaner outlet tube. For additional information, refer to Section 303-12 . 3. Remove the air cleaner housing. 1. Disconnect the mass air flow (MAF) sensor electrical connector. 2. Remove the bolt. 3. Remove the housing. 4. CAUTION: To disconnect the Norma fitting, squeeze the tabs and pull straight out or damage to the fitting can occur. Disconnect the crankcase ventilation tube. 5. Disconnect the fuel hose. For additional information, refer to Section 310-00 . 6. Disconnect the evaporative emission canister purge valve hose. 7. Remove the vapor management valve (VMV) cover. SECTION 303-01B: Engine — 3.9L 2002 Lincoln LS Workshop Manual IN-VEHICLE REPAIR Procedure revision date: 05/17/2001 Material Item Specification 8. Remove the VMV. 1. Disconnect the vacuum hose. 2. Disconnect the purge hose. 3. Disconnect the electrical connector and the push pin. 4. Remove the nuts and the valve. 9. Remove the exhaust gas recirculation (EGR) vacuum regulator solenoid. 1. Disconnect the electrical connector. 2. Remove the screws and the EGR vacuum regulator solenoid. 10. Remove the bracket. 1. Remove the hose. 2. Remove the bracket. 11. Position the engine wiring harness up. 12. Remove the ignition coil cover. * Inspect the gasket and install a new gasket as necessary.