GM 12568797
Timing Cover, Front

The replacement process begins with disconnecting the Battery Cable followed by draining a mixture of coolant and oil and continued with Coolant Reservoir removal. Start by removing the crankshaft balancer and drive belt tensioner and Power Steering Pump with attached lines before setting the pump to the side. Start by taking out these components in sequence: thermostat bypass pipe, radiator outlet hose, drive belt shield bolt and shield, water pump pulley bolts and the Water Pump Pulley. The Crankshaft Position Sensor electrical connector gets disconnected while technicians extract the lower Crankshaft Position Sensor wiring harness bracket bolt and bracket before they take out the engine front cover bolts (1, 2, 3) to remove the engine front cover and gasket. After cleaning the mating areas check the engine front cover for any sign of damage. When replacing the engine front cover it is essential to extract both the Crankshaft Position Sensor and the Water Pump from this component. To install the components start by adding sealant gm p/n 12346004 (Canadian P/N 10953480) or equivalent material to both sides of the lower gasket tabs then install the gasket followed by the engine front cover. Install the engine front cover bolts (1, 2, 3), tightening the small bolts to 27 nm (20 ft. Lbs.) engine front cover bolts (1, 2, 3) require torque values of 55 nm though (41 ft. Lbs.) while the large bolts (2, 3) need 55 nm torque. Reattach the lower Crankshaft Position Sensor wiring harness bracket and bolt, tightening the bolt to 27 nm (20 ft. Lbs.)install the drive belt shield after connecting its bolt at 10 nm (89 inch lbs.). Next, install the Water Pump Pulley and its bolts, tightening them to 25 nm (18 ft. Lbs.)the radiator outlet hose along with the thermostat bypass pipe and Power Steering Pump with lines and drive belt tensioner and crankshaft balancer are installed after the Water Pump Pulley and its bolts. Follow up by filling the crankcase with fresh engine oil and the cooling system and reattaching the negative Battery Cable while conducting a ckp system variation learn procedure.

Start by draining the vehicle's cooling system then disconnect the negative Battery Cable before beginning replacement of the engine front cover. Start by removing the drive belt tensioner then drain the engine oil before you remove the Oil Pan. The next step includes removing six major items: crankshaft balancer, thermostat bypass pipe, radiator outlet hose, Water Pump, and Power Steering Pump. Begin by unscrewing the engine front cover bolts to detach the combination of the front cover with its attached gasket. When replacing the engine front cover start by cleaning it then conducting an inspection. If a new front cover is required remove the drive belt shield bolt alongside the drive belt shield and Water Pump too. Installation requires gm p/n 12346004 (Canadian P/N 10953480) or equivalent sealer applied to front engine cover gasket surfaces with a minimum width of 5.0 mm (0.20 inch). Fitting the gasket and engine front cover goes next with the engine front cover bolts installed starting with small bolt torque to 27 nm (20 ft. Lbs.) and larger bolts (2, 3) reaching 55 nm (41 ft. Lbs.). The installation order requires the Power Steering Pump followed by the Water Pump and radiator outlet hose before adding the thermostat bypass pipe and crankshaft balancer and Oil Pan. Completion of the project involves tightening the drive belt tensioner while adding fresh engine oil to the crankcase and filling the cooling system and reconnecting the negative Battery Cable.

The correct procedure for replacing an engine front cover starts with removing the drive belt tensioner followed by draining the cooling system then moving onto Oil Pan removal along with crankshaft balancer removal followed by thermostat bypass pipe removal and radiator outlet hose removal and Power Steering Pump removal. First remove the three engine front cover bolts numbered 540, 541, and 545 before removing both the gasket and the actual engine front cover. Engine front cover replacement requires removal of both the drive belt shield bolt and the drive belt shield and the Water Pump. Installation begins with either replacing or installing the Water Pump when an engine front cover replacement occurred and proceeds with the front cover gasket. Apply sealer to both bottom tabs of the engine front cover gasket so that the sealer width reaches at least 5.0 mm (0.20 in). The installation of the engine front cover begins with tightening its bolts after applying sealer in the designated areas. Start by tightening the engine front cover bolts at 27 n.m (20 lb ft) then work your way to the engine front cover bolts at 55 n.m (41 lb ft). Follow the Power Steering Pump installation by reinstalling the radiator outlet hose and thermostat bypass pipe. Then reintegrate the crankshaft balancer. The system needs final filling while also reattaching the drive belt tensioner.

You must begin removal of the Timing Cover by disconnecting the battery's negative ground cable. Engine coolant and motor oil should drain from the cooling system and the engine. Once you separate the coolant recovery reservoir from the crankshaft balancer along with the drive belt tensioner and Power Steering Pump with its attached lines you can restage the pump where needed. The bypass pipe of the thermostat needs removal from the engine front cover while also detaching the radiator outlet hose from the coolant pump. Begin the front cover replacement process by removing the coolant pump pulley and then the engine front cover bolts (1, 2, and 3) and finally the lower Crankshaft Position Sensor wiring harness bracket. Wash down the gasket sealing areas before checking the condition of the engine front cover. When replacing the engine front cover drivers must also detach the drive belt shield with its attached Crankshaft Position Sensor and coolant pump. When reinstalling the engine replace the coolant pump onto the engine front cover first then reinstall the Crankshaft Position Sensor. Screw down the drive belt shield bolt until you reach 10 nm (89 inch lbs.). Place the engine front cover gasket over the surface before setting the engine front cover in position. Then secure the three engine front cover bolts (1, 2, and 3) with proper installation torque. Reconnect the lower Crankshaft Position Sensor wiring harness bracket alongside the coolant pump pulley and radiator outlet hose and thermostat bypass pipe. Place the Power Steering Pump into position with lines in place along with the drive belt tensioner and crankshaft balancer. Engine oil and engine coolant need to be filled prior to reconnecting the battery ground (negative) cable. Perform a ckp system variation learn procedure as the last step.

The first step in serving or repairing the Timing Cover is disconnecting the battery ground (negative) cable. The service begins with drainning both engine coolant and oil followed by removing the coolant recovery reservoir as well as the crankshaft balancer and drive belt tensioner and Power Steering Pump with attached lines before relocating the pump to the side. Remove the bypass pipe from the front cover and disconnect the hose departing from the coolant pump. Dismantle the lower Crankshaft Position Sensor wiring harness bracket while removing the coolant pump pulley then disconnect its electrical connector. Disassemble the engine front cover bolts and engine front cover gasket while removing both the front cover and its gasket. Inspection of the engine front cover should take place after cleaning its gasket sealing surfaces. When replacing the engine front cover it is necessary to remove three components: drive belt shield, crankshaft position sensor, and coolant pump. When replacing these components initiate their installation by first securing the coolant pump and Crankshaft Position Sensor to the front engine cover then continue with the drive belt shield. Screw the drive belt shield bolt while tightening it to 10 nm (89 inch lbs.). The installation requires gm p/n 1052080 sealant or equivalent for both sides of the lower tabs on the engine front cover gasket before gasket and cover installation. Tighten the five small engine front cover bolts to 21 nm (15 ft.lbs.) and the three large bolts to 55 nm (41 ft.lbs.) while the two large bolts require 47 nm (35 ft.lbs.). The lower Crankshaft Position Sensor wiring harness bracket returns to position before connecting the electrical connector to the sensor harness. Begin by mounting the coolant pump pulley followed by attaching a radiator outlet hose to the pump before completing the connection of a thermostat bypass pipe to the engine front cover. Safely reinstall the Power Steering Pump followed by its lines alongside the drive belt tensioner and crankshaft balancer. Place engine oil into the vehicle's engine and engine coolant into its cooling system before reconnecting the battery's negative (ground) cable. Conclude with the execution of ckp system variation learn operations.

The first step to work on the Timing Cover involves disconnecting the negative Battery Cable. The service team should recover a/c refrigerant while also draining down the cooling system. Use the engine support fixture (J28467-360) to detach the Engine Mount assembly along with Engine Mount bracket support, drive belt, air cleaner assembly, throttle body tube and power steering liner at the Power Steering Pump. Start by loosening the top two A/C Compressor bolts while removing the generator and its bracket. Then lift and stow the vehicle before removing the right front tire followed by the wheel assembly, right front splash shield, flywheel inspection cover, crankshaft balancer, and Drive Belt tensioner. Disconnect the right wheel speed sensor connector and wire harness from the suspension support before removing the right Ball Joint and stabilizer shaft as well as the A/C Compressor to Oil Pan bolts and Oil Filter and adapter. Start by draining engine oil before removing the Starter motor followed by the Oil Pan and crankshaft sensor. Finally, remove lower front cover bolts. You must lower the vehicle before removing the coolant bypass from the coolant pump and manifold as well as the Radiator Hose from the coolant outlet housing. After you remove front cover and front cover oil seal you need to clean the mating areas of front cover together with Oil Pan and cylinder block by using degreaser. Installation requires placing the front cover gasket followed by gm rtv sealer (GM P/N 1052080 or equivalent) application to both sides of its lower tabs before setting the front cover oil seal. Position the front cover on the engine and fasten its upper two bolts to 21 nm (15 ft. Lbs.). Mount both the Radiator Hose to coolant housing and the coolant bypass pipe to coolant pump and manifold. Raising the vehicle for support allows installation of lower front cover bolts before using a torque wrench to tighten small bolts to 21 nm (15 ft. Lbs.) and large bolts to 47 nm (35 ft. Lbs.). Mount the crankshaft sensor followed by the Oil Pan, starter motor, oil filter before installing the A/C Compressor to Oil Pan bolts and stabilizer shaft then right Ball Joint before final connections of the right wheel speed sensor connector and wire harness. The service technician should install the Drive Belt tensioner and crankshaft balancer followed by the flywheel inspection cover and right splash shield and right front tire and wheel assembly. After lowering the vehicle, install the Power Steering Pump and Drive Belt followed by the A/C Compressor top bolts, engine mount bracket support, engine mount assembly and tighten all 8 mm bolts to 20 nm and all 12 mm bolts to 40 nm. After removing the engine support fixture (J28467-360) add fluid to the cooling system followed by recommended oil to reach the appropriate crankcase level then install the negative Battery Cable.

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.

The first step in servicing and repairing the Timing Cover is to drain the engine cooling system and engine oil. Unbend the crankshaft balancer, drive belt tensioner, Power Steering Pump with lines, and relocate the pump. Detach the thermostat bypass pipe and radiator outlet hose from the front cover deconnecting it to remove the coolant pump pulley. Remove the upper and lower crankshaft position sensor wiring harness brackets, the engine front cover bolts as well as the and in order to remove the engine front cover and its gasket. Clean the sealing surfaces and check at the front cover for damages. To change the engine front cover, remove the drive belt shield, crankshaft position sensor, and coolant pump. To install: if attempted to remove - reinstall coolant pump and crankshaft position sensor, followed by the drive belt shield, securing bolt 10 nm (89 inch lbs.). Install the engine front gasket with sealer gm p/n 12346004 both sides of the lower tabs, install the engine front and tighten bolt (55 Nm/41 ft. Lbs.); bolt (47 Nm /35 ft. Lbs.); and bolts (21 Nm /16 ft. Lbs.). It is necessary to reattach the lower and upper crankshaft position sensor wiring harness brackets, coolant pump pulley, radiator outlet hose, and thermostat bypass pipe. Finally install Power Steering Pump with lines, drive belt tensioner and crank shaft balancer and this engine you have to fill new engine oil and engine coolant system.

Tighten the small bolts to 27 Nm (20 ft. lbs.) and the large bolts (2,3) to 55 Nm (41 ft. lbs.).

Remove the drive belt shield, crankshaft position sensor, and coolant pump from the front cover.

Also remove the drive belt shield bolt and the drive belt shield, as well as the water pump.

Remove the oil pan and the engine front cover bolts.

Remove the engine support fixture, install the drive belt tensioner, fill the cooling system and crankcase with engine oil, reconnect the negative battery cable, inspect for leaks, and perform the CKP system variation learn procedure.

Apply sealant to both sides of the engine front cover gasket using GM P/N 12346004 (Canadian P/N 10953480) or equivalent.

Install the engine mount, tightening the water pump pulley bolts to 25 Nm (19 ft. lbs.), reinstall the oil pan, and fill the cooling system.

Drain the cooling system and remove the oil pan, crankshaft position (CKP) sensor, and lower front cover bolts.

Reposition the pump afterward.

The drive belt shield and the crankshaft position sensor.

Ensure to tighten the engine front cover bolts to 25 Nm (18 ft. lbs.) and the water pump bolt to 25 Nm (18 ft. lbs.).

Fill the engine with new oil and the cooling system with coolant.

Detach the thermostat bypass pipe and radiator outlet hose from the engine front cover, followed by the water pump.

Attach the radiator outlet hose and thermostat bypass pipe, followed by the power steering pump, crankshaft balancer, oil pan, and drive belt tensioner.

Reinstall the power steering pump, water pump, radiator outlet hose, and thermostat bypass pipe.

Detach the upper and lower crankshaft position sensor wiring harness brackets and remove the engine front cover bolts.

Disconnect the thermostat bypass pipe and radiator outlet hose from the front cover.