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Content .. 1882 1883 1884 1885 ..
CAMSHAFT POSITION ACTUATOR AND SOLENOID VALVE DIAGNOSIS AND TESTING 1. Measure the engine oil level. Fill, as required. 2. Using the scan tool, inspect for diagnostic codes within the engine control module (ECM). Refer to Diagnostic System Check - Vehicle . Repair, as required. 3. Verify proper engine oil pressure and operation of the active fuel management oil pressure relief valve. Refer to Oil Pressure Diagnosis and Testing. 4. Inspect the CMP actuator solenoid valve for proper operation. Refer to Camshaft Position Actuator Solenoid Valve Inspection (On-Vehicle) or Camshaft Position Actuator If valve inspection confirms proper movement of the spool, replace the CMP actuator If valve inspection confirms improper movement of the spool, replace only the CMP 5. Verify proper operation of the CMP actuator control system. Refer to Diagnostic Starting Point - Engine Controls . OIL LEAK DIAGNOSIS IMPORTANT: Camshaft Position (CMP) Actuator and Solenoid Valve Diagnosis and Testing is applicable for RPO LY6/L76/L92. Step Action Yes No IMPORTANT: You can repair most fluid leaks by first visually locating the leak, repairing or replacing the 1 1. Operate the vehicle until it reaches normal operating temperature. 2. Park the vehicle on a level surface, over a large sheet of paper or other clean surface. 3. Wait 15 minutes. 4. Inspect for drippings. Are drippings present? Go to Step 2 System OK 2 Can you identify the type of fluid and the Go to Step 10 Go to Step 3
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
3 1. Visually inspect the suspected area. Use a small mirror to assist in looking at hard to 2. Inspect for leaks at the following locations: Sealing surfaces Fittings Cracked or damaged components Can you identify the type of fluid and the Go to Step 10 Go to Step 4 4 1. Completely clean the entire engine and surrounding components. 2. Operate the vehicle for several kilometers, miles, at normal operating temperature and 3. Park the vehicle on a level surface, over a large sheet of paper or other clean surface. 4. Wait 15 minutes. 5. Identify the type of fluid, and the approximate location of the leak. Can you identify the type of fluid and the Go to Step 10 Go to Step 5 5 1. Visually inspect the suspected area. Use a small mirror to assist in looking at hard to 2. Inspect for leaks at the following locations: Sealing surfaces Fittings Cracked or damaged components Can you identify the type of fluid and the Go to Step 10 Go to Step 6 1. Completely clean the entire engine and surrounding components. 2. Apply an aerosol-type powder, baby
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
6 powder, foot powder, etc., to the suspected 3. Operate the vehicle for several kilometers, miles, at normal operating temperature and 4. Identify the type of fluid, and the approximate location of the leak, from the Can you identify the type of fluid and the Go to Step 10 Go to Step 7 7 1. Visually inspect the suspected area. Use a small mirror to assist in looking at hard to 2. Inspect for leaks at the following locations: Sealing surfaces Fittings Cracked or damaged components Can you identify the type of fluid and the Go to Step 10 Go to Step 8 8 Use the J 28428-E high-intensity black light kit Go to Step 10 Go to Step 9 9 1. Visually inspect the suspected area. Use a small mirror to assist in looking at hard to 2. Inspect for leaks at the following locations: Sealing surfaces Fittings Cracked or damaged components Can you identify the type of fluid and the Go to Step 10 System OK
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
CRANKCASE VENTILATION SYSTEM INSPECTION/DIAGNOSIS 10 1. Inspect the engine for mechanical damage. Special attention should be shown to the Higher than recommended fluid levels Higher than recommended fluid Plugged or malfunctioning fluid filters Plugged or malfunctioning engine Improperly tightened or damaged Cracked or porous components Improper sealants or gaskets, where Improper sealant or gasket installation Damaged or worn gaskets or seals Damaged or worn sealing surfaces 2. Inspect the engine for customer modifications. Is there mechanical damage, or customer Go to Step 11 System OK 11 Repair or replace all damaged or modified Go to Step 1 System OK Symptom Correction External oil leak Inspect for any of the following conditions: Restricted or kinked PCV hose or engine vent hose Damaged, incorrect, or incorrectly installed PCV hose Excessive crankcase pressure Rough Idle Inspect for any of the following conditions:
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Content .. 1882 1883 1884 1885 ..
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