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Fig. 92: Locating Coolant Plug 10. Remove the cylinder head plug (229) from the right cylinder head. Disassemble CYLINDER HEAD CLEANING AND INSPECTION Tools Required
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
J 8089 Carbon Removal Brush. See Special Tools . J 9666 Valve Spring Tester. See Special Tools . Inspection Fig. 93: Removing Carbon From Combustion Chambers CAUTION: Refer to Safety Glasses Caution .
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
1. Clean the following components: Use the J 8089 in order to remove the carbon from the combustion chambers. See Gasket surfaces Refer to Replacing Engine Gaskets . Valve stems and heads on a buffing wheel Bolt hole threads Remove all dirt, debris, or threadlocking material from the bolt holes. 2. Inspect the cylinder head for the following conditions: 1. Cracks in the exhaust ports and combustion chambers 2. External cracks in the water chambers 3. Gasket surfaces for excessive scratches or gouging Refer to Replacing Engine Gaskets . 4. Bolt hole threads for debris or damaged threads Refer to Thread Repair or Thread Repair Specifications . IMPORTANT: When cleaning a cylinder head in a thermal type oven, Be careful not to scuff the chamber.
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
Fig. 94: Inspecting Cylinder Head For Warpage 3. Inspect the cylinder head for warpage. Refer to Engine Mechanical Specifications (RPO LY5 VIN J) or Engine Mechanical Specifications (RPO LC9 VIN 3) or Engine
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
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