Camshaft

Camshaft

CYLINDER HEAD AND CAMSHAFT (PART 1):

CYLINDER HEAD AND CAMSHAFT (PART 2):

REMOVAL

NOTE: Perform the work with the engine installed to body when replacing a single part. Refer to "Valve Clearance" for preparation.

1) 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) Disconnect the oil flow control solenoid valve assembly connector.

7) Remove the tensioner bracket.

8) Remove the timing belt cover No. 2 (LH).

9) Remove the timing belt cover No. 2 (RH).

10) Remove the ignition coil.
11) Disconnect the PCV hose from the rocker cover.
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 order shown in the figure.

16) Loosen the exhaust camshaft cap bolts equally, a little at a time in alphabetical order 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) Install the camshaft.

Apply engine oil to the cylinder head at camshaft bearing installation location before installing the camshaft. Install the camshaft so that each valve is close to or in contact with base circle of the cam lobe.

NOTE:
^ Set the camshaft to the position shown in the figure. It is necessary to rotate the camshaft (LH) slightly 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.

Exhaust camshaft (LH):

2) Install the camshaft cap and oil flow control solenoid valve assembly.
(1) Apply small amount of liquid gasket to the mating surface of cap.

NOTE: Do not apply liquid gasket excessively. Applying excessively may cause excess gasket to come out and flow toward oil seal, resulting in oil leak.

Liquid gasket:
THREE BOND 1215 (Part No. 004403007) or equivalent

Liquid gasket:

(2) Apply a thin coat of engine oil to the cap bearing surface, and install the cap to the camshaft according to the identification mark.
(3) Gradually tighten the camshaft cap and oil control valve assembly in at least two stages in alphabetical order shown in the figure, and then tighten to specified torque.

Tightening torque:
T1: 9.75 N-m (1.0 kgf-m, 7.2 ft. lbs.)
T2: 20 N-m (2.0 kgf-m, 14.5 ft. lbs.)

Tightening torque:

(4) After tightening the camshaft cap, ensure the camshaft rotates only slightly while holding it at base circle.
3) Apply a coat of engine oil to the camshaft oil seal periphery and oil seal lips, then install the oil seal on the camshaft using ST1 and ST2.

NOTE: Use a new oil seal.

ST1 499587600 OIL SEAL INSTALLER
ST2 499597200 OIL SEAL GUIDE

4) Install the rocker cover.
(1) Install the gasket on rocker cover. Install the peripheral gasket and ignition coil gasket.

NOTE: Use a new gasket.

(2) Apply liquid gasket to the specified point of the cylinder head.

NOTE: Apply extra amount of liquid gasket around semicircular plugs 5 mm or more.

Liquid gasket:
THREE BOND 1215 (Part No. 004403007) or equivalent

Liquid gasket:

(3) Install the rocker cover on cylinder head. Ensure the gasket is properly positioned during installation.
(4) Temporarily tighten the rocker cover tightening bolt in alphabetical sequence shown in the figure, and then tighten to specified torque in alphabetical order.

Tightening torque:
6.4 N-m (0.65 kgf-m, 4.7 ft. lbs.)

Tightening torque:

5) Install the oil pipe.

CAUTION: Install to the position shown in the figure as the head side and oil flow control solenoid valve side of union screw are of different specification.

Tightening torque:
29 N-m (3.0 kgf-m, 21.4 ft. lbs.)

Tightening torque:

6) Connect the oil flow control solenoid valve connector.

7) Connect the PCV hose to the rocker cover.
8) Tighten the ignition coil.
9) Similarly, install the parts on right-hand side.
10) Install the tensioner bracket.

Tightening torque:
24.5 N-m (2.5 kgf-m, 18.1 ft. lbs.)

Tightening torque:

11) Install the timing belt cover No. 2 (RH).

Tightening torque:
5 N-m (0.5 kgf-m, 3.6 ft. lbs.)

Tightening torque:

12) Install the timing belt cover No. 2 (LH).

Tightening torque:
5 N-m (0.5 kgf-m, 3.6 ft. lbs.)

Tightening torque:

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.

Service limit:
0.020 mm (0.0008 inch) or less

Service limit:

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 the standard value, check the oil clearance.

4) Measurement of the camshaft journal oil clearance
(1) Clean the bearing caps and camshaft journals.
(2) Place the camshafts on cylinder head. (Without installing the valve lifter)
(3) Place a Plastigage(R) across each camshaft journals.
(4) Gradually tighten the cap in at least two stages in alphabetical order shown in the figure, and then tighten to specified torque. Do not turn the camshaft.

Tightening torque:
T1: 9.75 N-m (1.0 kgf-m, 7.2 ft. lbs.)
T2: 20 N-m (2.0 kgf-m, 14.5 ft. lbs.)

Tightening torque:

(5) Remove the bearing caps.
(6) Measure the widest point of the Plastigage(R) on each journal. If oil clearance exceeds the standard, replace the camshaft. If necessary, replace the camshaft caps and cylinder head as a set.

Standard:
0.037 - 0.072 mm (0.0015 - 0.0028 inch)

Standard:

(7) Completely remove the Plastigage(R).
5) Check the cam face condition; remove the minor faults by grinding with oil stone. Measure the cam height H. If it exceeds the standard or offset wear occurs, 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)

Cam base circle diameter A:
37.0 mm (1.457 inch)

6) Measure the thrust clearance of camshaft with setting the dial gauge at end of camshaft. If the thrust clearance exceeds the standard or there is offset wear, replace the caps and cylinder head as a set. If necessary replace the camshaft.

Standard:
0.068 - 0.116 mm (0.0027 - 0.0047 inch)