Timing Belt
REMOVAL AND INSTALLATION
[SOHC]
[DOHC]
Removal Service Points
[A] Timing Belt Removal
1. Mark the belt running direction for reference in reinstallation.
NOTE:
1. Water or oil on the belt shortens its life drastically, so the removed timing belt, sprocket, and tensioner must be kept free from oil and water. Do not immerse parts in cleaning solvent.
2. If there is oil or water on any part, check the front case oil seal, camshaft oil seal and water pump for leaks.
[B] Camshaft Sprocket Bolt Removal
[C] Camshaft Sprocket Bolt Removal
1. Hold the hexagonal portion of the camshaft with a wrench, when removing the camshaft sprocket bolt.
Installation Service Points
]A[ Camshaft Sprocket Bolt Tightening
]B[ Camshaft Sprocket Bolt Tightening
1. Hold the hexagonal portion of the camshaft with a wrench when tightening the camshaft sprocket bolt. Tighten the bolt to the specified torque.
]C[ Rocker Cover Installation
1. Apply sealant to the areas shown in the illustration.
Specified sealant: 3M ATD Part No.8660 or equivalent.
2. Tighten the rocker cover bolts in the sequence shown in the illustration.
]D[ Timing Belt Tensioner Installation
1. Insert a screwdriver into the hole of the timing belt tensioner arm, move it all the way in the direction of the arrow, and tighten the tensioner lock bolt to temporarily hold this position.
]E[ Auto-Tensioner Installation
If the auto-tensioner rod is fully extended, set it in the retracted position with the following procedure.
1. Set the auto tensioner in a vice.
2. Slowly close the vice to force the rod in until the set hole (A) of the rod is lined up with the set hole (B) of the cylinder.
3. Insert a wire [1.4 mm (0.055 inch) in diameter] into the set holes.
4. Remove the auto tensioner from the vice.
5. On engines with turbocharger, apply sealant to the threads of the auto tensioner mounting bolt.
Specified sealant: 3M ATD Part No.8660 or equivalent.
]F[ Timing Belt Installation
1. Align the timing marks of the camshaft sprockets and the crankshaft sprocket.
2. Install the timing belt on the crankshaft sprocket first and while keeping the belt tight on the tension side, install the belt on the left camshaft sprocket.
3. Then, install on the water pump pulley and on the right camshaft sprocket and finally on the timing belt tensioner.
4. Install the flange onto the front end of the crankshaft.
5. Install the special tool onto the crankshaft.
6. Loosen the tensioner lock bolt one or two turns and allow the spring to tension the timing belt.
7. Turn the crankshaft two full turns clockwise. Turn smoothly and in clockwise direction only.
8. Again line up the timing marks on the sprockets and tighten the tensioner lock bolt to the specified torque.
]G[ Timing Belt Installation
1. Using the special tool, line up the crankshaft sprocket timing marks, and then rotate the sprocket one tooth counterclockwise.
2. Line up the timing marks of the camshaft sprockets for left bank.
3. Using two wrenches, line up the timing marks of the camshaft sprockets for right bank.
CAUTION:
1. Since valve spring force can turn the camshaft sprocket, be careful not to catch your finger.
2. If either camshaft sprocket is rotated one complete turn clockwise or counterclockwise after lining up the timing marks of the other camshaft sprocket, the intake and exhaust valves might interfere. Consequently, if a camshaft sprocket was turned too far in lining up the timing marks, be sure to rotate it back from that position to line up again the timing marks.
4. Install the timing belt on the exhaust side camshaft sprocket for right bank and hold it with a paper clip at the position shown in the illustration.
5. Install the timing belt on the intake side camshaft sprocket and hold it with a paper clip at the position shown in the illustration.
CAUTION: Since the camshaft sprocket turns easily, avoid excessive pulling on the timing belt.
6. Check that the timing marks of the camshaft sprockets for left bank are in alignment. Then install the timing belt on these sprockets and hold it with a paper clip at the positions shown in the illustration.
7. Install the timing belt on the idler pulley.
8. Install the timing belt on the crankshaft sprocket.
9. Install the timing belt on the tensioner pulley.
10. Push the timing belt lightly against the tensioner pulley and tighten the fixing bolt temporarily
11. Remove the four paper clips.
12. Using the special tool, turn the crankshaft a quarter turn counterclockwise. Then rotate it clockwise to line up the timing marks and check that all the timing marks are in alignment.
13. Loosen the center bolt of the auto-tensioner pulley, and install the special tool and a torque wrench on the pulley. While holding the pulley with approximately 9.8 Nm (7 ft. lbs.) torque to prevent it from turning, tighten the center bolt to the specified torque.
14. Turn the crankshaft two turns clockwise, and leave it alone for about five minutes. Then move in and out the auto-tensioner setting metal wire to check that the wire moves smoothly.
NOTE: If the metal wire does not move smoothly, repeat step (12) until it does move smoothly.
15. Remove the auto tensioner setting metal wire.
16. Check that the spacing between the tensioner arm and auto tensioner is within the standard limit.
Standard value: 3.8 - 4.5 mm (0.150 - 0.177 inch)
]H[ Engine Support Bracket Installation
1. Tighten the engine support bracket bolts in the order shown in the illustration.
NOTE: The bolt used at the location shown in the illustration is a reamer bolt (head mark ("R").
INSPECTION
Timing Belt
Replace belt if any of the following conditions exist.
1. Hardening of back rubber-back side is glossy without resilience and leaves no indent when pressed with fingernail.
2. Cracks on rubber back
3. Cracks or peeling of canvas
4. Cracks on tooth bottom
5. Cracks on belt
6. Abnormal wear of belt sides. The sides are normal if they are sharp as if cut by a knife.
7. Abnormal wear on teeth
8. Tooth missing and canvas fiber exposed.
Tensioner
1. Turn the pulley. If it rotates unsmoothly, develops noise or excessive play, replace the timing belt tensioner.
Auto-Tensioner
1. Check for oil leaks. If oil leaks are evident, replace the auto-tensioner.
2. Check the rod end for wear or damage and replace the auto-tensioner if necessary.
3. Measure the rod projection length. If the reading is outside the standard value, replace the auto-tensioner.
Standard value: 11.7 - 12.3 mm (0.461 - 0.484 inch)
4. Press the rod with a force of 98 to 196 N (22 to 44 lbs.) and measure the movement of rod. If the measured value is out of the standard value, replace the auto-tensioner.
Standard value: 1 mm (0.0393 inch) or less