Chevrolet 93445880 Cover Assembly, Engine Front

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Detach the cable from the negative terminal of the battery, ensuring to disable the anti-theft feature on models equipped with such a system before disconnecting the battery. Remove the power steering reservoir, being prepared to catch the fluid in a drain pan. Take off the upper fan shroud and the drivebelts, then detach the fan and drivebelt pulley. Disconnect and unbolt the alternator and brackets, then raise the front of the vehicle and support it on jackstands while applying the parking brake. Drain the coolant and detach the lower radiator hose from the water pump. Remove the crankshaft pulley and hub, followed by the timing cover-to-block bolts, and carefully pry off the cover, which may be sealed with RTV. Use a scraper to remove all old sealant from the cover, oil pan, and block, then clean the mating surfaces. Check the cover flanges for distortion and flatten them if necessary. Apply a 3/8-inch wide by 3/16-inch thick bead of RTV sealant to the timing cover flange that mates with the oil pan, and a 1/4-inch wide by 1/8-inch thick bead to the cover-to-block flange, along with a dab of sealant to the joints between the oil pan and the engine block. Position the cover and loosely install a couple of mounting bolts, then install the crankshaft hub to center the cover, ensuring to lubricate the seal contact surface of the hub. Install the remaining mounting bolts and tighten them to the specified torque, followed by the crankshaft pulley and reconnecting the lower radiator hose. Lower the vehicle, refill the cooling system, reinstall the components removed for access, reattach the cable to the negative terminal of the battery, and finally start the engine to check for oil leaks at the seal.

Install the Crankshaft Position Sensor reluctor with the dished side facing out.

After installing the timing chain cover, lubricate the oil seal contact surface of the vibration damper hub with moly-base grease or clean engine oil. Install the damper on the crankshaft and follow the remaining installation steps, including using a new O-ring for the crankshaft position sensor.

Use a gasket scraper to remove any old gasket material and clean the sealing surfaces.

Before installing the timing chain cover, use a gasket scraper to remove old gasket material and sealant. Clean the cover and block sealing surfaces with lacquer thinner or acetone.

Use a gasket scraper to remove any old gasket material and clean the sealing surfaces.

Disconnect the negative battery cable.

Loosening the front oil pan nuts allows for easier removal of the timing chain cover.