Timing Belt Tensioner Replacement. Chevrolet Metro 1998

For 1990-2009 cars

### Removal Procedure

1. Remove the crankshaft timing pulley. Refer to Crankshaft Pulley Replacement in Engine Mechanical.
2. Remove the air cleaner assembly.
3. Remove the eight bolts and one nut that secure the timing belt cover (12). Remove the timing belt cover.

Important: Before removing the timing belt, align the upper and the lower timing marks by turning the crankshaft.

4. Ensure that the upper timing marks (1 and 2) are aligned.
5. Ensure that the lower timing marks (1 and 2) are aligned.
6. Loosen the timing belt tensioner bolt (2) and the stud (1).
7. Remove the belt from the crankshaft timing belt pulley and the camshaft timing belt pulley after pushing up the tensioner plate fully with your finger.

Notice: After timing belt is removed, never turn camshaft and crankshaft independently. If turned, interference may occur among pistons and valves, and parts related to pistons and valves may be damaged.

8. Remove the tensioner.
9. Remove the tensioner plate.
10. Remove the tensioner spring and the spring damper.
11. Inspect the timing belt for wear or cracks. Replace the belt as necessary.
12. Inspect the timing belt tensioner for smooth rotation.

### Installation Procedure

1. Install the tensioner plate to the timing belt tensioner. Insert the tensioner plate lug (1) into the timing belt tensioner hole (2).
2. Install the timing belt tensioner and the tensioner plate to the cylinder block. Secure the tensioner and tensioner plate with one bolt (2) and one stud (1). Do not tighten fully.
3. Ensure that the plate movement in the direction of the arrow causes the tensioner to move in the same direction. If the tensioner does not move in the same direction, remove the tensioner and the tensioner plate and reinsert the tensioner plate lug in the timing plate tensioner hole.
4. Ensure that the mark on the camshaft timing belt pulley (2) is aligned with the V mark on the inside of the timing belt cover (1).
5. Ensure that the punch mark on the crankshaft timing belt pulley (2) is aligned with the arrow mark on the oil pump case (1).
6. Install the timing belt.

Important:

• | Match the arrow mark on the timing belt with the rotating direction of the crankshaft, when installing the timing belt.

• | Align the timing marks.

• | Push the tensioner plate up.

• | Install the timing belt.

• | Install the tensioner spring. Ensure that there is no slack in the timing belt.

• | Install the tensioner stud and tighten by hand only.

7. Turn the crankshaft two rotations clockwise after installing the timing belt. This will take up the slack in the timing belt.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

8. Tighten the timing belt tensioner stud (1).

Tighten
Tighten the timing belt tensioner stud to 11 N·m (97 lb in).

9. Secure the timing belt tensioner bolt.

Tighten
Tighten the timing belt tensioner bolt to 25 N·m (18 lb ft).

10. Confirm again that both sets of timing marks are aligned properly.
11. Ensure that the coolant pump-to-oil case seals (2) are in place before you install the timing belt cover.
12. Install the timing belt cover (12). Secure the timing belt cover with the eight bolts and the one nut.

Tighten
Tighten the timing belt cover nut and bolts to 11 N·m (97 lb in).

13. Install the crankshaft pulley. Refer to Crankshaft Pulley Replacement in Engine Mechanical.
14. Install the air cleaner assembly.