Camshaft
Camshaft
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 timing belt cover No. 2 (LH).
8) Remove the timing belt cover No. 2 (RH).
NOTE: Do not damage or lose the seal rubber when removing the timing belt covers.
9) Remove the tensioner bracket.
10) Remove the ignition coil.
11) Disconnect the PCV hose from the rocker cover.
12) Remove the rocker cover and gasket.
13) Remove the oil pipe.
14) 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.
15) Loosen the exhaust camshaft cap bolts equally, a little at a time in alphabetical order shown in the figure.
16) Remove the oil flow control solenoid valve assembly, intake camshaft cap and camshaft.
17) Remove the exhaust camshaft caps and camshaft.
NOTE: Arrange camshaft caps in order so that they can be installed in their original positions.
18) Remove the oil seal.
CAUTION: Do not scratch the journal surface when removing the oil seal.
19) Similarly, remove the camshafts (RH) and related parts.
INSTALLATION
1) Install the camshaft.
Apply engine oil to the cylinder head at camshaft journal 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.
^ When set at the position shown in the figure, it is not necessary to rotate the camshaft (RH) when installing the timing belt, but it is necessary to rotate the camshaft (LH) slightly.
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:
^ Install within 5 min. after applying liquid gasket.
^ Do not apply liquid gasket excessively. Applying excessively may cause excess gasket to come out and flow toward oil seal, resulting in oil leak.
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.
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 oil pipe.
NOTE: Make sure not to mix up the union screws with filter and without filter as their installation positions are different.
5) Connect the oil flow control solenoid valve connector.
6) Tighten the ignition coil.
7) Similarly, install the parts on right-hand side.
8) Install the tensioner bracket.
9) Install the timing belt cover No. 2 (RH).
10) Install the timing belt cover No. 2 (LH).
11) Install the cam sprocket.
12) Install the timing belt.
13) Adjust the valve clearance.
14) Install the rocker cover.
1) Install the rocker cover gasket to the rocker cover.
NOTE: Use a new gasket.
2) Apply liquid gasket to the specified point of the cylinder head. Apply extra amount of liquid gasket around semicircular plugs 5 mm or more.
NOTE: Install within 5 min. after applying liquid gasket.
Liquid gasket. THREE BOND 1217G (Part No. K0877Y0100) or equivalent
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.
5) Connect the PCV hose.
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 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 plastigauge 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.
5) Remove the bearing caps.
6) Measure the widest point of the plastigauge on each journal. If oil clearance exceeds the standard, replace the camshaft. If necessary, replace the camshaft caps and cylinder head as a set.
7) Completely remove the plastigauge.
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.
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.
