You should remove the air cleaner assembly, the accessory drive belts, the accessory drive belt tensioners, the accessory drive belt idler pulleys, the water pump pulley, the water outlet housing, the radiator hose, and the heater hose from the thermostat housing, the crankshaft balancer, the engine front cover bolts, the engine front cover, the engine front cover gasket and the oil pump drive to crankshaft balancer friction washer.