Timing belt - general view.
Timing belt.
1 - lower timing belt cover, 2 - upper timing belt cover, 3 - engine side support bracket, 4 - lower protective cover, 5 - timing belt, 6 - crankshaft pulley.
Withdrawal
1. Remove the engine noise cover.
2. Using a 16mm wrench, turn the accessory drive belt auto tensioner lever clockwise about 14 degrees, then remove the belt.
3. Remove the power steering pump pulley and crankshaft pulley, tensioner pulley and idler pulley.
4. Remove the upper and lower timing belt covers.
5. Remove the automatic timing belt tensioner.
Attention: Turn the crankshaft clockwise until the alignment marks on the crankshaft sprocket and cylinder block are aligned to set the piston of cylinder No. 1 to TDC on the compression stroke. In this case, the marks of the camshaft sprockets must be aligned with the corresponding alignment marks on the cylinder head cover.
6. Move the tensioner pulley away from the timing belt and secure, then remove the timing belt.
Note: In case of reusing the timing belt, it must be chalked on the back (non-working) on the surface of the belt with an arrow indicating the direction of rotation, so that when installing the belt, do not confuse the direction of its rotation.
Examination
Sprockets, timing belt tensioner pulley and idler pulley
1. Check the camshaft sprocket, crankshaft sprocket, timing belt tensioner pulley and idler pulley for excessive wear, cracks or damage. Replace if necessary.
2. Check the ease and smoothness of rotation of the timing belt tensioner roller and guide roller, and check that there is no excessive play and extraneous noise during rotation. Replace if necessary.
Installation
Attention:
- Since water or oil can seriously reduce the life of the timing belt, when removing parts, ensure that the timing belt, sprockets and rollers are clean and dry, never wash them. Contaminated parts must be replaced.
- If any of the parts are oily, then check for oil leakage through the seals (including front camshaft oil seal).
- Check up a condition and smoothness of rotation of a roller of a tensioner.
- If a used timing belt is installed, check its condition (see the relevant section in chapter "Maintenance and general inspection and adjustment procedures".
1. Install the guide roller on the coolant pump housing.
Note: Install the guide roller so that it is located near the guide pin, which is pressed into the lug of the water pump housing.
2. Install the auto-tensioner arm with flat washer on the cylinder block and tighten its fastening bolt.
- Tightening torque: 35-55 Nm
3. Install the timing belt tensioner pulley on the auto tensioner arm and tighten the tensioner bolt.
- Tightening torque: 43-55 Nm
4. Install the camshaft sprockets and align the sprocket marks with the alignment marks.
Note:
- When installing the camshaft sprocket, tighten the sprocket mounting bolt while holding the shaft by the hexagonal part from turning.
- If the marks on the camshaft sprocket do not match the alignment marks on the cylinder head covers before installing the timing belt, do not turn the camshaft sprocket more than 3 teeth in each direction.
- When turning the camshaft sprocket more than 3 teeth, the valves and pistons may touch.
- If it is necessary to turn the camshaft sprocket more than 3 teeth, then carefully turn the crankshaft counterclockwise a certain amount before turning the camshaft sprocket.
5. Install the automatic timing belt tensioner on the oil pump housing and tighten its mounting bolts.
Attention: before installation, fix the auto-tensioner rod in the housing with the dowel pin.
- Tightening torque: 20-27 Nm
6. Check the alignment of all marks with the alignment marks and put on the timing belt in the following sequence: crankshaft sprocket, guide roller, camshaft sprocket of the left cylinder head, coolant pump pulley, camshaft sprocket of the right cylinder head, tensioner pulley.
Note:
- When performing this operation, set the piston of cylinder No. 1 to TDC of the compression stroke.
- Be careful not to put your fingers between the belt and the sprocket as the sprocket may twist and cause injury.
7. Remove the dowel pin from the auto tensioner.
8. Checking the timing belt tension.
- A) Rotate the crankshaft two turns clockwise until the piston of cylinder N91 is at TDC on the compression stroke.
- 6) Leave the crankshaft stationary for five minutes.
- V) Check the protrusion of the auto tensioner rod. The protrusion of the stem should be within 6-8 mm.
- G) Check the alignment of the marks of all the sprockets with the alignment marks.
Note: if the sprocket marks are not aligned with the alignment marks, then repeat the timing belt installation procedure, starting from step 6.
9. Install the upper and lower timing belt covers. Tighten bolts of their fastening the nominal moment.
- Tightening torque: 10-12 Nm
10. Install the power steering pump pulley, crankshaft pulley, accessory drive belt tensioner pulley and idler pulley. Tighten the accessory drive belt tensioner bolts to the rated torque.
- Tightening torque: 20-27 Nm
11. Using a 16mm wrench, turn the auto accessory drive belt tensioner lever clockwise about 14 degrees, then install the accessory drive belt.
12. Install the engine noise cover.