How do you change a timing belt on a 1989 Toyota Corolla?

Answer 1

Removal (1988-92 Corolla)

# Raise and support vehicle. Remove right front wheel and engine undercover. Remove washer tank. Loosen water pump pulley bolts, then remove all accessory drive belts. Remove valve cover. # Disconnect engine wiring harness from upper timing belt cover. Rotate crankshaft so that No. 1 cylinder is at TDC of compression stroke. Notch in crankshaft pulley must align with "0" timing mark on timing belt cover. # Support weight of engine with a floor jack. Remove engine mount at timing belt end of engine. # Remove water pump pulley. Remove crankshaft pulley bolt. Using gear puller, remove crankshaft pulley. Remove timing belt covers. Remove timing belt guide (large washer) from crankshaft sprocket. # If reusing timing belt, mark direction of rotation on timing belt. Match mark timing belt with marks on both sprockets for installation reference. Place arrow on belt to indicate original direction of rotation. # Loosen idler pulley (tensioner) bolt. Push idler pulley as far to the left as possible, and snug tighten bolt. Remove timing belt. Inspection (1988-92 Corolla)

# Check timing belt teeth for cracks or damage. If tooth damage is found, ensure camshaft and crankshaft sprockets are okay. If wear or cracks on flat side of belt face are found, check for nicks on idler pulleys. If wear or damage to only one side of belt is found, check belt guide and alignment of each pulley and sprocket. # Check free length of idler pulley tension spring. Replace spring if free length is not 1.51" (38.4 mm). Check tension at installed length. Tension should be 8.8 lbs. at 1.976" (4 kg at 50.2 mm). Installation (1988-92 Corolla)

# Ensure No. 1 cylinder is at TDC on compression stroke. Crankshaft key will be at 12 o'clock position, and timing mark notch on crankshaft sprocket will align with timing mark on oil pump housing. . Hole in camshaft sprocket must align with mark on bearing cap. NOTE: Engine should be cold when installing timing belt. # Ensure idler pulley (tensioner) is pushed as far to the left as possible and pulley bolt is snug tight. If reusing old timing belt, install belt and align match marks made during removal. Install new timing belt. # Loosen idler pulley (tensioner) bolt and allow pulley to move against belt. Rotate crankshaft CLOCKWISE 2 revolutions from TDC to TDC. # Recheck timing mark alignment. If timing marks are not aligned, remove and reinstall timing belt. # With idler pulley bolt still loose, measure timing belt deflection at midway point of belt longest run. Deflection should be .20-.24" with pressure of 4.4 lbs. (5-6 mm at 2.0 kg) applied. If deflection is not as specified, readjust tension on belt by moving idler pulley (tensioner). # Tighten idler pulley bolt to specification. See TORQUE SPECIFICATIONS . Install timing belt guide to crankshaft sprocket. # Install timing belt covers. Install crankshaft pulley. Tighten center bolt to specification. See TORQUE SPECIFICATIONS . When installing valve cover, ensure sealant is apply in correct positions. ee Fig. 6 . # Install water pump pulley. Install accessory drive belts. Adjust drive belts to proper tension. Final tighten water pump pulley bolts. # Install front wheel and engine undercover.