Removal (Prizm)Disconnect negative battery cable. Raise and support vehicle. Remove right lower engine cover. Remove accessory drive belts. Remove crankshaft pulley. See Fig. 4 . Remove valve cover and windshield washer reservoir. Using Support Fixture (J028467-A), support engine. Remove through bolt at engine mount located near timing belt cover. Remove transaxle mounts-to-crossmember nuts. Raise engine slightly. Remove water pump pulley. Lower engine. Remove timing belt covers. If necessary, remove A/C compressor with hoses attached. Remove timing belt guide. Loosen idler pulley bolt. Move idler pulley away from timing belt and temporarily tighten idler pulley bolt. Remove timing belt. CAUTION:If timing belt is to be reused, mark direction of timing belt rotation and place reference marks on timing belt and sprockets for installation reference.
If camshaft sprocket is to be removed, install wrench on hexagonal area of camshaft and hold camshaft. Remove retaining bolt and camshaft sprocket. If necessary, remove crankshaft sprocket. Fig. 4: Exploded View of Timing Belt & Components (Prizm)Courtesy of GENERAL MOTORS CORP.InspectionInspect timing belt for damaged teeth or cracking. Ensure timing belt is not contaminated with oil. Check idler pulley for rotation freedom. Replace damaged components. Check free length of idler pulley spring. Free length is measured from end to end of spring (not coil area). Replace spring if free length is not 1.512" (38.40 mm). InstallationInstall crankshaft sprocket (if removed) and camshaft sprocket. Tighten retaining bolt to specification. See TORQUE SPECIFICATIONS tables at end of article. Ensure all timing marks align. See Fig. 5 . Install timing belt. If reusing old timing belt, ensure belt is installed in original rotating direction. Ensure marks on belt align with camshaft and crankshaft sprockets. Loosen idler pulley bolt to allow tension to be applied on timing belt. Rotate crankshaft clockwise 2 revolutions. Ensure all timing marks are aligned. Tighten idler pulley bolts to specification. See TORQUE SPECIFICATIONS table at end of article. Measure timing belt deflection at midway point between camshaft and crankshaft sprockets. See Fig. 5 . With 4.4 lbs. (1.9 kg) applied on timing belt, deflection should be .20-.24" (5.1-6.9 mm). If belt deflection is not within specification, repeat steps 3) and 4).