Rocker Arm

DISASSEMBLY
1. Remove the breather hose and PCV valve.
2. Remove the timing belt cover.
3. Remove the rocker cover.





4. Loosen the flange bolts and remove the rocker arm shaft, rocker arms and rocker arm shaft springs as an assembly.
5. Remove the bolts, the rocker arms and arm shaft springs from the rocker arm shaft.

INSPECTION





ROCKER ARM
1. Check the rotation of roller. Replace it if not rough or worn.
2. Check the rocker face. Replace it if damaged or pressed.
3. Check hydraulic lash adjust (HLA) face that contact the valve stem.
If badly worn or damaged, replace the HLA.

ROCKER ARM SHAFT
1. Check the rocker arm shafts for damage. Replace as necessary.
2. Check the oil hole for foreign matter.

REASSEMBLY
1. Install the rocker arms and rocker arm shaft springs to the rocker arm shafts, Install the rocker arm shaft to the cylinder head.
Tighten the rocker arm shaft mounting bolts to the specified torque.
Tightening torque
Rocker arm shaft mounting bolt 20 - 27 Nm (200 - 270 kg.cm, 15 - 20 ft. lbs.)





2. When installing the rocker arms, shafts, and springs, note the difference between the A and B type rocker arms, and exhaust side needs only A type rocker arms.





3. Install the rocker cover and tighten the bolts to the specified torque.
Tightening torque
Rocker cover bolt: 8 - 10 Nm (80 - 100 kg.cm, 6 - 7 ft. lbs.)





CAUTION:
1. Sealant must be applied to top surface of cylinder head and cam cap and area of application is shown In figure.
2. The proper amount of sealant must be used to prevent the sealant from pushing excessive amounts.
3. Use sealant of specified brands or equivalent.
4. Sealant (Three bond No. 1212D aluminum color or equivalent) application place (4 place).





4. Install the timing belt cover.
Tightening torque
Timing belt cover bolt 10 - 12 Nm (100 - 120 kg.cm, 7 - 9 ft. lbs.)
5. Install the air cleaner.
6. Install the breather hose and PCV hose.

HLA





With the HLA filled with engine oil, hold A and press B by hand. If B moves, Replace the HLA.





For other specific trouble shooting regarding HLA, refer to the table.

VALVE SEAT INSERT REPLACEMENT PROCEDURE





1. Any valve seat insert that has been worn over the service limit should be removed at normal temperature after cutting away most of the insert wall, using valve seat cutters, as shown in Fig A.
2. After removing the seat insert, machine the seat insert bore using a reamer or a cutter. Cut to the size shown in the table.
3. Heat the cylinder head to about 250°C (480°F) and press in the oversize seat insert. The oversize seat insert should be at normal room temperature for installation. After installing a new valve seat insert, resurface the valve seat using the same procedure described in the first paragraph of "Valve Seat Insert" (above).





VALVE SEAT INSERT OVERSIZES

VALVE GUIDE REPLACEMENT PROCEDURES
The valve guide is installed using a press fit. Using a Valve Guide Installer (09221-22000) or suitable tool, replace the valve guide described in the following procedure.





1. Using the Valve Guide installer push rod, push the valve guide out toward the cylinder block with a press.
2. Machine the valve guide insert hole in the cylinder head to the specified oversize of the new valve guide.





3. Using the Valve Guide Installer or suitable tool, press fit the valve guide. Using the valve guide installer makes it possible to press fit the valve guide to a predetermined height. Install the valve guide from the top of the cylinder head. Note that intake and exhaust valve guides differ in length (42.7 mm [1.68 inch] for intake and 39.1 mm [1.54 inch] for exhaust).
4. After installing the valve guides, insert new valves and check the clearance.
5. Whenever valve guides are replaced, check for valve-to-seat contact, and recondition the valve seats as necessary.