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15. Install the water pump to water pump housing bolts. Tighten: Tighten the water pump to water pump housing bolts to 21 N.m (15 lb ft). 16. Install a new O-ring to the water pump. EXHAUST GAS RECIRCULATION COOLER CLEANING AND INSPECTION Fig. 72: EGR Cooling Hoses 1. Remove the exhaust gas recirculation (EGR) cooling hoses. 2. Clean and inspect the EGR gasket surfaces. 3. Clean and inspect the EGR and cooler. 4. Replace the EGR or cooler if damaged. THREAD REPAIR General purpose thread repair kits are available commercially. NOTE: Refer to Fastener Notice .
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 73: Drilling & Tapping Damaged Threads 1. Determine the size, the pitch, and the depth of the damaged thread. CAUTION: Refer to SAFETY GLASSES CAUTION . IMPORTANT: Refer to the thread repair kit manufacturer's instructions regarding the size of the drill and which tap to use.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
2. Adjust the stop collars on the cutting tool as needed. Tap the stop collars to the required depth. 3. Drill out the damaged thread. 4. Remove the chips. 5. Apply clean engine oil to the top thread. 6. Use the tap in order to cut new thread. 7. Clean the thread. Fig. 74: Installing Thread Insert 8. Screw the thread insert onto the mandrel of the thread insert installer. Engage the tang of the
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
thread insert onto the end of the mandrel. 9. Lubricate the thread insert with clean engine oil - except when installing in aluminum - and install the thread insert. 10. If the tang of the thread insert does not break off when backing out the thread insert installer, break off the tang using a drift punch. FUEL LINE TORQUING IMPORTANT: The thread insert should be flush to 1 turn below the surface.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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