Timing Belt: Service and Repair
TIMING BELT AND BELT TENSIONER
REMOVAL
1. Disconnect negative cable at battery.
2. Remove right side of engine under cover.
3. Remove A/C compressor, P/S pump and drive belt with hoses still attached, if equipped.
NOTE: Suspend removed A/C compressor and P/S pump at a place where no damage will be caused during removal and installation of timing belt and belt tensioner.
4. Support engine by using lifting device.
5. Remove air cleaner case with air cleaner outlet hose.
6. Remove engine right mounting bracket and stiffener.
7. Remove water pump pulley and drive belt.
8. Remove crankshaft pulley by removing 5 pulley bolts.
9. Release harness clamps.
10. Remove timing belt outside cover.
11. For installation of timing belt, align 4 timing marks as shown in figure by turning crankshaft.
12. Remove timing belt tensioner, tensioner plate, tensioner spring and timing belt.
PRECAUTION
CAUTION:
^ After timing belt is removed, never turn camshaft and crankshaft independently more than such an extent as shown in figure. If turned, interference may occur among piston and valves, and parts related to piston and valves may be damaged.
^ Never bend timing belt.
INSPECTION
^ Inspect timing belt for wear or crack.
Replace it as necessary.
^ Inspect tensioner for smooth rotation.
INSTALLATION
1. Install tensioner plate to tensioner.
Insert lug of tensioner plate into hole in tensioner.
2. Install tensioner and tensioner plate:
Do not tighten tensioner bolt with wrench yet. Hand tighten only at this time.
Check to ensure that plate movement in arrow direction as shown in figure causes tensioner to move in the same direction. If no associated movement between plate and tensioner occurs, remove tensioner and plate again and reinsert plate lug into tensioner hole.
3. Check that timing mark on camshaft timing belt pulley is aligned with "V" mark on cylinder head cover. If not, align two marks by turning camshaft but be careful not to turn it more than its allowable turning range which is described in PRECAUTION.
4. Check that punch mark on crankshaft timing belt pulley is aligned with arrow mark on oil pump case. If not, align two marks by turning crankshaft but be careful not to turn it more than its allowable turning range which is described in PRECAUTION.
5. Install timing belt and tensioner spring.
With two sets of marks aligned and tensioner plate pushed up, install timing belt on two pulleys in such a way that drive side of belt is free from any slack.
And then install tensioner spring as shown in figure, and hand tighten tensioner stud.
NOTE:
^ When installing timing belt, match arrow mark on timing belt with rotating direction of crankshaft.
^ In this state, No.4 piston is at top dead center of compression stroke.
6. To take up slack of timing belt, turn crankshaft two rotations clockwise after installing it. After making sure that belt is free from slack, tighten tensioner stud first and then tensioner bolt to each specified torque.
Then confirm again that two sets of marks are aligned respectively.
Tightening Torque
(a): 11 Nm (1.1 kg-m, 8.0 ft. lbs.)
(b): 25 Nm (2.5 kg-m, 18.0 ft. lbs.)
7. Install timing belt outside cover.
Before installing, make sure that seal is between water pump and oil pump case.
Tightening Torque (a): 11 Nm (1.1 kg-m, 8.0 ft. lbs.)
8. Install crankshaft pulley.
Fit pin hole of pulley to dowel pin on crank timing belt pulley, and tighten 5 bolts to specified torque.
Tightening Torque (a): 16 Nm (1.6 kg-m, 11.5 ft. lbs.)
9. Clamp harness securely.
10. Install water pump pulley and drive belt.
Tightening Torque (a): 11 Nm (1.1 kg-m, 8.0 ft. lbs.)
11. Install engine right mounting bracket and stiffener.
Tightening Torque (a): 55 Nm (5.5 kg-m, 40.0 ft. lbs.)
12. Install air cleaner case with air cleaner outer pipe.
13. Remove lifting device.
14. Install A/C compressor and P/S pump.
15. Adjust drive belt tension.
16. Adjust power steering pump belt tension or A/C compressor belt tension, if equipped. Refer to Drive Belt.
17. Connect negative cable at battery.