Camshaft
REMOVAL1. Remove the V-belts.
2. Remove the crank pulley.
3. Remove the timing belt cover.
4. Remove the timing belt.
5. Remove the cam sprocket.
6. Remove the crank sprocket.
7. Disconnect the oil flow control solenoid valve assembly connector.
8. Remove the tensioner bracket.
9. Remove the timing belt cover No. 2 (LH).
10. Remove the timing belt cover No. 2 (RH).
11. Remove the spark plug cords.
12. Remove the oil level gauge guide. (LH side)
13. Remove the rocker cover and gasket.
14. Remove the oil pipe.
15. Loosen the oil flow control solenoid valve assembly and intake camshaft cap bolts equally, a little at a time in alphabetical sequence shown in the figure.
16. Loosen the exhaust camshaft cap bolts equally, a little at a time in alphabetical sequence shown in the figure.
17. Remove the oil flow control solenoid valve assembly, intake camshaft cap and camshaft.
18. Remove the exhaust camshaft caps and camshaft.
NOTE: Arrange camshaft caps in order so that they can be installed in their original positions.
19. Similarly, remove the camshafts (RH) and related parts.
INSTALLATION
1. Camshaft installation:
Apply engine oil to the cylinder head at camshaft bearing location before installing the camshaft. Install the camshaft so that each valve is close to or in contact with "base circle" of cam lobe.
NOTE:
^ Position the camshafts as shown in the figure. Camshaft (LH) need to be rotated at a minimum when installing the timing belt.
^ Camshaft (RH) need not be rotated when set at the position shown in the figure.
Intake camshaft (LH): Rotate 80° clockwise.
Exhaust camshaft (LH): Rotate 45° counterclockwise.
2. Camshaft cap and oil flow control solenoid valve assembly installation:
a Apply small amount of liquid gasket to the cap mating surface.
NOTE: Do not apply liquid gasket excessively. Otherwise, the excessive liquid gasket may come out and flow toward oil seal, resulting in oil leaks.
Liquid gasket: THREE BOND 1215 (Part No. 004403007) or equivalent
b Apply engine oil to the cap bearing surface, and install the cap on camshaft as shown by identification mark.
c Gradually tighten the camshaft cap and oil control valve assembly in at least two stages in alphabetical sequence shown in the figure, and then tighten to the specified torque.
d After tightening the camshaft cap, ensure the camshaft rotates only slightly while holding it at "base circle".
3. Camshaft oil seal installation:
Apply grease to the new oil seal lips and press onto the front end of camshaft by using ST1 and ST2.
NOTE: Use a new oil seal.
ST1 499587600 OIL SEAL INSTALLER
ST2 499597200 OIL SEAL GUIDE
4. Rocker cover installation:
a Install the gasket on rocker cover. Install the peripheral gasket and ignition coil gasket.
b Apply liquid gasket to the designated point of cylinder head.
c Install the rocker cover on cylinder head. Ensure the gasket is properly positioned during installation.
d Tighten the rocker cover tightening bolt in alphabetical sequence shown in the figure, and then tighten to the specified torque.
5. Install the oil pipe.
6. Connect the oil flow control solenoid valve connector.
7. Install the spark plug cord.
8. Similarly, install the parts on right-hand side.
9. Install the timing belt cover No. 2 (RH).
10. Install the timing belt cover No. 2 (LH).
11. Install the tensioner bracket.
12. Install the crank sprocket.
13. Install the cam sprocket.
14. Install the timing belt.
15. Install the timing belt cover.
16. Install the crank pulley.
17. Install the V-belts.
INSPECTION
1. Measure the bend, and repair or replace if necessary.
2. Check the journal for damage and wear. Replace if faulty.
3. Measure the outside diameter of camshaft journal. If the journal diameter is not within specification, check the oil clearance.
4. Measurement of the camshaft journal oil clearance:
a Clean the bearing caps and camshaft journals.
b Place the camshafts on cylinder head.
c Place a plastigauge across each of the camshaft journals.
d Gradually tighten the cap in at least two stages in alphabetical sequence shown in the figure, and then tighten to the specified torque. Do not turn the camshaft.
e Remove the bearing caps.
f Measure the widest point of the plastigauge on each journal. If oil clearance exceeds the limit, replace the camshaft. If necessary, replace the camshaft caps and cylinder head as a set.
g Completely remove the plastigauge.
5. Check the cam face condition, and remove the minor faults by grinding with oil stone. Measure the cam height H. If it exceeds the limit or has partial wear, replace it.
Cam height H:
Standard
Intake 46.55 - 46.65 mm (1.833 - 1.837 inch)
Exhaust 46.75 - 46.85 mm (1.841 - 1.844 inch)
6. Measure the side clearance of camshaft with dial gauge. If the clearance exceeds the limit or has partial wear, replace the caps and cylinder head as a set. If necessary, replace the camshaft.