GM 14090022 Cover,Engine Front

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Disconnect the negative battery cable from the battery. On models equipped with the Delco Loc II audio system, make sure the lockout feature is turned off before performing any procedure that requires disconnecting the battery. Loosen the water pump pulley bolts, then remove the serpentine drivebelt. Remove the water pump pulley. Remove the vibration damper. Unbolt the drivebelt tensioner and idler, if equipped. Drain the coolant and engine oil. Remove the alternator and loosen the mounting bracket. Unbolt the power steering pump (if equipped) and tie it aside. Leave the hoses connected. Unbolt the flywheel/driveplate cover below the transaxle. Remove the starter. Remove the oil pan. Disconnect the coolant hoses from the fill pipe and water pump. Unbolt the spark plug wire shield at the water pump. Disconnect the canister purge hose and tie it aside. Remove the Timing Cover-to-engine block bolts. Note that some of the bolts require T-40 or T-50 Torx bits for removal. Separate the cover from the engine. If it is stuck, tap it with a soft-face hammer, but do not try to pry it off. Use a gasket scraper to remove all traces of old gasket material and sealant from the cover and engine block. The cover is made of aluminum, so be careful not to nick or gouge it. Clean the gasket sealing surfaces with lacquer thinner or acetone. Apply a thin layer of sealant to the lower corners on both sides of the new gasket, then position the gasket on the engine block (the dowel pins should keep it in place). Attach the cover to the engine and install the bolts. Apply sealant to the bottom of the gasket. Follow a criss-cross pattern when tightening the fasteners and work up. The remainder of the installation is the reverse of removal. Add oil and coolant, start the engine, and check for leaks.

The oil pan should be installed to complete the installation. The removal procedure should be reversed.

During installation, ensure proper alignment of the crankshaft sprocket with the Woodruff key and the balance shaft gears.

Install the timing chain cover using a new rubber seal.

Temporarily install the crankshaft pulley hub and bolt, align the timing marks on the crankshaft and camshaft sprockets, push back the timing chain tensioner and insert a pin to retain it, use a prybar to hold the engine while removing the camshaft bolt, and carefully pry off the camshaft sprocket.

The number four piston should be at top dead center (TDC) on the compression stroke before proceeding with timing chain cover removal.