Timing Belt: Service and Repair

TIMING BELT





COMPONENTS

REMOVAL
1. Using a [16 mm], rotate the tensioner arm clockwise (about 14°) and remove the belt from the pulley.
2. Remove the power steering pump pulley, idler pulley, tensioner pulley and crankshaft pulley.
3. Remove the upper and lower timing belt covers.





4. Remove the auto tensioner.





NOTE: Rotate the crankshaft clockwise and align the timing mark to set the No. 1 cylinder's piston to TDC (compression stroke). At this time, the timing marks of the camshaft sprocket and cylinder head cover should coincide with each other.

5. Unbolt the tensioner to remove the timing belt.

NOTE: If you plan to use the timing belt again, mark the rotation direction on the belt so you reinstall it correctly.

INSPECTION
1. Inspect the belt closely. If the following problems are evident, replace the belt with a new one.





1) Hardened back surface of rubber Back surface is shiny, non-elastic and so hard that when the nail of your finger is pressed into it, no mark is produced.





2) Cracked back surface of rubber.





3) Side of belt is badly worn.

NOTE: A belt in good condition should have clear-cut sides as if it were cut with a sharp knife.

4) Teeth are badly worn out.
Initial stage: Canvas on load side of the tooth flank worn (fluffy canvas fibers, rubber gone, color changed to white, and unclear canvas texture)
Last stage: Canvas on the load side of the tooth flank worn down and rubber exposed (tooth width reduced).





5) Missing tooth





2. If backlash or an irregular noise is observed when rotating the pulley, replace the timing belt tensioner and idler pulley.





TIMING BELT

INSTALLATION
The method of installing timing belt and auto tensioner.





1. Install idler pulley to idler bracket.





2. Install tensioner arm, shaft and plane washer to cylinder block.
Tightening torque: 35 - 55 Nm (350 - 550 kg-cm, 25 - 40 lb.ft)





3. Install crankshaft sprocket and align the timing mark.





CAUTION: Be careful not to bend crankshaft sensing blade.





4. Install camshaft sprocket and adjust initial installation state as illustration.





5. Install auto tensioner to oil pump case.

NOTE: At this time auto tensioner's set pin should be assembled completely.





6. Align the timing marks of each sprocket and install the timing belt in this order. Crankshaft sprocket --> Idler pulley --> Exhaust camshaft sprocket (LH) --> Intake camshaft sprocket (LH) --> Water pump pulley --> Intake camshaft sprocket (RH) --> Exhaust camshaft sprocket (RH) Tensioner pulley





NOTE:
- In this step, No. 1 is in TDC (Compression stroke)
- Do not insert fingers.

7. After installing the timing belt, reconfirm the timing mark.
8. Install the power steering pump pulley, idler pulley and tensioner pulley.
9. Install the crankshaft pulley.
Tightening torque: 176 Nm (1800 kg-cm., 130 lb.ft)

CAUTION:
- Crankshaft bolt is a "one-time" use and must be replaced whenever it is removed.
- Include proper crankshaft bolt torque specs.

10. Pull out the auto tensioner set pin after adjusting timing belt tension. Refer to: Timing Belt Tensioner, Adjustments