Start with coolant drainage from the cooling system to begin Timing Cover servicing and repairs. The first step is to remove the drive belt tensioner after which you should remove the crankshaft balancer. Distance the wiring harness connectors from the engine front cover to remove the
Crankshaft Position Sensor shield. The engine support fixture (J 28467-B) must be installed to access the engine mount bracket before its removal. This procedure provides clearance for working on the
Oil Pan. Engine front cover clearance becomes possible by slightly dropping the Oil Pan after all pan bolts get loosened and when the oil level sensor gets removed. Lower the Oil Pan while you remove the Oil Pan-to-engine front cover bolts and the
Oil Filter assembly. Begin by removing the radiator outlet hose and
Water Pump Pulley then continue with the Crankshaft Position Sensor removal. Begin by removing all engine front cover attaching bolts which allows you to remove the engine front cover with Oil Filter adapter assembly. Afterward remove the engine front cover gasket. Before engine front cover replacement you should detach the Oil Filter adapter and pressure relief valve and Water Pump and oil pump cover and gear set from the front cover. The inspection of oil pump components needs to be combined with a check of the
Timing Chain's overall motion to ensure it stays below 25.4 mm (1 inch). Begin by degreasin' the mating surfaces combining front cover and cylinder block together with sealing surfaces before moving forward. To begin front cover installation replace all elements starting with the
Camshaft Position Sensor followed by oil pump cover and gear set and finally Oil Filter adapter and pressure relief valve and Water Pump. Replace the crankshaft front oil seal and engine front cover gasket following bolt thread application of gm p/n 1052080 sealer or equivalent material. Position the sprocket cogs from the crankshaft with those facing the oil pump gear set before attaching the engine front cover with the Crankshaft Position Sensor. Following engine front cover bolt tightening to 20 nm (15 ft. Lbs.), utilize the torque angle meter (J 36660-A) to perform a 40-degree bolt rotation. Follow inspection of the Oil Pan Gasket by replacing it if required before tightening the Oil Pan-to-engine front cover bolts and all Oil Pan bolts using 14 nm (125 inch lbs.). Place the engine mount bracket and lower the engine while fastening the engine mount bracket bolts. After removing the engine support fixture j 28467-b you should install the Water Pump Pulley and connect the radiator outlet hose while installing the Oil Filter. Reinstall the shield on the Crankshaft Position Sensor followed by attaching wiring harness connectors to the engine front cover. The last steps involve mounting the crankshaft balancer alongside the drive belt tensioner then you need to complete the cooling system with engine coolant and add clean engine oil to the crankcase and perform fluid level inspections.