- Do not bend or twist the timing belt.
- Do not allow the timing belt to come into contact with oil or water.
- Do not stretch the timing belt when installing or removing the camshaft toothed pulley mounting bolt.
2 Check the timing belt for the following defects as shown in the figure
- a) Check the correct installation of the timing belt
- Check timing belt cover gaskets for damage and proper installation
- b) If the belt teeth are damaged or cracked, check that the camshaft and fluid pump are not seized.
- c) If significant wear is observed on the non-working side of the belt, check for nicks on the tensioner roller side.
- d) If wear or damage is detected on only one side of the belt and the pulleys are not positioned correctly.
- d) If there is significant wear on the belt teeth, check the timing belt cover for damage. If necessary, replace the timing belt.
3. Check the tension roller and idler pulley.
- a) Check the roller and pulley surfaces for smooth rotation. Replace them if necessary.
4. (3S-FE, 4A-FE, 4S-FE, 5E-FE. 7A-FE) Check the tension roller spring. Measure the length of the spring in the free state (see picture), as well as the force required for a given
deformations (stretching) of the spring ("installation" force)
Length of spring in free state:
- 3S-FE, 4S-FE - 46.0 mm
- 2 C, 2 C - T - 51.9 mm
- 4A-FE - 35.3 mm
- 5E-FE - 38.4 mm
- 7A-FE - 31.8 mm
If the free length is not as required, replace the tensioner roller spring.
The force required to increase the length of the spring to the "installed" state.
- 3S-FE, 4S-FE (50.5 mm) - 32-37 N
- 2S, 2S-T (63.0 mm) - 42 N
- 4A-FE (43.6 mm) - 35-39 N
- 5E-FE (47.4 mm) - 32 N
- 7A-FE (37.6 mm) - 47.5-51.5 N
If the spring length and/or "set" force is not within specifications, replace the spring.