Timing Belt: Service and Repair
TIMING SYSTEMCOMPONENTS:
REMOVAL
1. Remove the engine cover (A).
2. Remove the front right wheel and tire.
3. Remove the right side cover.
4. Remove the drive belt (A), the idler (B) and the tensioner (C).
NOTE: In removing the drive belt, fix a tool in the auto tensioner pulley bolt and turn the bolt counter clockwise.
5. Remove the timing belt upper cover (A).
6. Align the groove of the pulley with the timing mark of the timing belt cover by turning the crankshaft pulley clockwise. Check if the timing mark of the camshaft sprocket is aligned with that of the cylinder head cover.
(No.1 cylinder piston at TDC)
7. Remove the engine mounting bracket.
1) Sustain the engine oil pan with a jack.
CAUTION: Put a wooden or rubber block between the jack and the engine oil pan.
2) Remove the engine mounting bracket (A).
8. Remove the crankshaft damper pulley (A).
NOTE:
There are two methods to hold the ring gear when installing or removing the crankshaft damper pulley.
Install the SST (09231-2B100) to hold the ring gear after removing the starter.
-OR-
Install the SST (09231-3D100) to hold the ring gear after removing the dust cover.
1. Remove the front muffler. (Refer to Intake And Exhaust system)
2. Remove the dust cover (A) on the bottom of the upper oil pan and unfasten the two transaxle mounting bolts (B).
3. Adjust the length of the holder nuts (A) so that the front plate of the holder (B) puts in the ring gear (C) teeth.
4. Fasten the bolt 70mm(2.7559in) and the bushing 30mm(1.1811in) in the original mounted hole.
5. Install the SST (09231-3D100) using the two mounting bolts. Tighten the bolts and nuts of the holder securely.
9. Remove the timing belt lower cover (A).
10. Remove the engine support bracket (A).
NOTE: After removal, a small amount of engine coolant may drain from point (B).
11. Remove the timing belt auto tensioner (A).
12. Remove the timing belt (A).
NOTE: Mark the direction of rotation on the timing belt.
13. Remove the tensioner arm assembly (A) and the idler (B).
14. Remove the crankshaft sprocket.
INSTALLATION
1. Install the crankshaft sprocket.
2. Install the tensioner arm assembly(A) and the idler(B).
Tightening torque: Tensioner arm bolt : 34.3 - 53.9Nm (3.5 - 5.5kgf.m, 25.3- 39.8lb-ft) / Idler pulley bolt : 49.0 - 58.8Nm (5.0 - 6.0kgf.m, 36.2- 43.4lb-ft)
3. Ensure the timing marks on the camshaft and the crankshaft sprockets.
4. Install the timing belt.
Crankshaft sprocket(A) -> Idler(B) -> Bank 2 exhaust camsprocket(C) -> Water pump pulley(D) -> Bank 1 exhaust camsprocket(E) -> Tensioner pulley(F).
5. Install the timing belt auto tensioner.
(1) Make the tensioner stand for about five minutes before installing.
(2) Press the rod with the weight, 150 - 200N.
(3) If the rod is stiff, insert a set-pin with pressing the rod slowly. If not, press the rod 2 - 3 times from the maximum length to 2.9mm(the position in which the two holes of the rod and the body can be at one).
(4) Check for stiffness. If there is, insert a set-pin and other wise, replace the auto-tensioner.
NOTE:
a. Do not lay down the auto tensioner.
b. Do not compress the rod suddenly. Compress the rod with the weight less than 4000N.
c. When reinstalling the auto tensioner, ensure proper orientation.
d. Do not press the rod any more when its projection from the body is 2.5mm.
e. Keep the auto-tensioner stand at room temperature in winter.
(5) Install the auto tensioner(A) to the front case with the set-pin inserted.
Tightening torque: 19.6 - 26.5Nm (2.0 - 2.7kgf.m, 14.5 - 19.5lb-ft)
6. Remove the auto tensioner set-pin.
7. Check the tension of the timing belt.
(1) Turn the crankshaft 2 revolutions clockwise, and set the number one cylinder to TDC.
After 5minutes, measure the length of the projected rod.
Specification5 - 7mm (0.1969 - 0.2756in.)
(2) Ensure the locations of the timing marks for each sprocket.
8. Install the engine support bracket(A).
Tightening torque: 58.8 - 68.6Nm (6.0 - 7.0kgf.m, 43.4 - 50.6lb-ft)
CAUTION:
a. Check for the length of the bolts.(Upper-2EA/Lower-1EA).
b. Use a torque wrench by all means.
9. Install the timing belt lower cover.
Tightening torque: 9.8 - 11.8Nm (1.0 - 1.2kgf.m, 7.8 - 8.7lb-ft)
NOTE:
Align the holes of the bolts by pushing the left timing belt lower cover to left a little bit.
10. Install the crankshaft damper pulley(A).
Tightening torque: 166.7 - 176.5Nm (17.0 - 18.0kgf.m, 123.0 - 130.2lb-ft)
11. Install the engine mounting bracket(A).
Tightening torque: 63.7 - 83.4Nm (6.5 - 8.5kgf.m, 47.0 - 61.5lb-ft)
12. Install the timing belt upper cover(A).
Tightening torque: 9.8 - 11.8Nm (1.0 - 1.2kgf.m, 7.2 - 8.7lb-ft)
13. Install the drive belt tensioner(C).
Tightening torque: 34.3 - 53.9Nm (3.5 - 5.5kgf.m, 25.3 - 39.8lb-ft)
14. Install the drive belt idler and the drive belt(A).
Tightening torque: 34.3 - 53.9Nm (3.5 - 5.5kgf.m, 25.3 - 39.8lb-ft)
15. Install the right side cover.
16. Install the front right wheel and tire.
17. Install the engine cover(A).
Tightening torque: 7.8 - 11.8Nm (0.8 - 1.2kgf.m, 5.8 - 8.7lb-ft)
INSPECTION
SPROCKETS, TENSIONER, IDLER
1. Check the camshaft sprocket and crankshaft sprocket, tensioner pulley and idler pulley for abnormal wear, cracks, or damage. Replace as necessary.
2. Inspect the tensioner and the idler for easy and smooth rotation and check for play or noise. Replace as necessary.
3. Replace the tensioner and the idler if grease has leaked from the bearings.
TIMING BELT
1. Check the belt for oil or dust deposits.
Replace, if necessary.
Small deposits should be wiped away with a dry cloth or paper. Do not clean with solvent.
2. When the engine is overhauled or belt tension adjusted, check the belt carefully. If any of the following flaws are evident, replace the belt.
NOTE:
a. Do not bend, twist or turn the timing belt inside out.
b. Do not allow the timing belt to come into contact with oil, water and steam.
3. Inspect the idler for easy and smooth rotation and check for play or noise.