Valve Guide Seal: Service and Repair
CAMSHAFT AND VALVE STEM SEALREMOVAL AND INSTALLATION
CAUTION:
^ If the vehicle is equipped with the Brembo(TM) disc brake, during maintenance, take care not to contact the parts or tools to the caliper because the paint of caliper will be scratched.
^ *Remove and assemble the marked parts in each cylinder unit.
Pre-removal & Post-installation Operation:
Removal Steps 1-18:
Removal Steps 19-46:
Removal Steps 47-55 & Required Special Tools:
REMOVAL SERVICE POINTS
[[A]] RADIATOR UPPER HOSE DISCONNECTION
Make mating marks on the radiator hose and the hose clamp. Disconnect the radiator hose.
[[B]] CAMSHAFT SPROCKETS REMOVAL
1. Hold the hexagon part of the camshaft with a wrench.
2. Loosen the camshaft sprocket mounting bolts and remove the camshaft sprocket.
[[C]] VALVE SPRING RETAINER LOCKS REMOVAL
CAUTION: When removing valve spring retainer locks, leave the piston of each cylinder in the TDC (Top Dead Center) position. The valve may fall into the cylinder if the piston is not properly in the TDC position.
Use special tool MD998772 to compress the valve spring, remove the valve spring retainer locks.
INSTALLATION SERVICE POINTS
]]A[[ EXHAUST VALVE STEM SEALS/INLET VALVE STEM SEALS INSTALLATION
1. Apply a small amount of engine oil to the valve stem seals.
CAUTION:
^ Valve stem seals cannot be reused.
^ The special tool MD998737 must be used to install the valve stem seal. Improper installation could result in oil leaking past the valve guide.
2. Use special tool MD998737 to fill a new valve stem seal in the valve guide using the valve stem area as a guide.
NOTE: Check the valve stem seal color to identify the inlet side or exhaust side.
]]B[[ VALVE SPRINGS INSTALLATION
The small end of the valve spring should face the rocker arm.
]]C[[ VALVE SPRING RETAINER LOCKS INSTALLATION
Use special tool MD998772 to compress the valve spring in the same manner as removal.
]]D[[ ROCKER ARM LASH ADJUSTERS INSTALLATION
CAUTION: If the rocker arm lash adjuster is reused, always clean and check it before installation.
]]E[[ EXHAUST CAMSHAFT/INLET CAMSHAFT INSTALLATION
1. Remove sealant remained on the cylinder head.
2. Apply engine oil to the cam and the journal of the camshaft.
CAUTION: Do not install wrong camshaft on the side of inlet or exhaust. The exhaust camshaft has a slit at the rear surface.
3. Install the camshaft to the cylinder head.
]]F[[ CAMSHAFT BEARING CAPS, NUMBER 4/CAMSHAFT BEARING CAPS, NUMBER 3/CAMSHAFT BEARING CAPS, NUMBER 5/CAMSHAFT BEARING CAPS, NUMBER 2/CAMSHAFT BEARING CAPS, REAR/CAMSHAFT BEARING CAPS, FRONT INSTALLATION
1. Set the dowel pin of the camshaft to the position as shown in the illustration.
2. Since the shape of camshaft bearing caps number 2 - 5 is identical, check the identification marks so that the bearing cap No., inlet side, or exhaust side is installed in the direction shown in the illustration.
Identification mark (engraved on the front and bearing caps number 2 - 5)
I: Inlet side
E: Exhaust side
3. Apply sealant to the positions (8 areas) of the upper side of the cylinder head as shown in the illustration.
Specified sealant: 3M(TM) AAD Part No. 8672, 3M(TM) AAD Part No. 8679/8678 or equivalent
4. Position the camshaft bearing caps, rear in the direction as shown in the illustration for installation.
5. Check the identification marks on the camshaft bearing caps, front so that inlet side and exhaust side is installed in the same way as that of bearing caps number 2 - 5.
6. Tighten the bearing cap mounting bolts increasing the pressure in 2 to 3 times and finally tighten to the specified torque.
Tightening torque: 20 ± 1 Nm (14 ± 0.5 ft. lbs.)
7. Ensure that the rocker arms are installed properly.
NOTE: Remove an excess sealant completely.
]]G[[ CAMSHAFT OIL SEALS INSTALLATION
1. Apply engine oil to the entire inner diameter of the oil seal lip.
2. Use special tool MD998713 to press-fit the oil seals.
]]H[[ CAMSHAFT SPROCKET (INLET SIDE) INSTALLATION
1. Apply engine oil to the top end of the camshaft and the camshaft mounting location of the camshaft sprocket.
2. Align the dowel pin hole on the camshaft sprocket with the dowel pin of the camshaft. Then, install the camshaft sprocket to the camshaft.
3. Hold the flats of the camshaft with a wrench, and check that the camshaft sprocket does not rotate.
NOTE: This operation is carried out because it is impossible to visually check that the dowel pin of the camshaft is inserted into the dowel pin hole of the camshaft sprocket.
4. Apply engine oil to the thread and the bearing surface of the camshaft sprocket mounting bolts. Then, hold the camshaft with a wrench in the same way as removal and tighten the bolts to the specified torque.
Tightening torque: 65 ± 5 Nm (48 ± 4 ft. lbs.)
]]I[[ CAMSHAFT SPROCKETS INSTALLATION
1. Hold the hexagon part of the camshaft with a wrench in the same manner as removal.
2. Tighten the camshaft sprocket mounting bolts to the specified torque.
Tightening torque: 89 ± 9 Nm (65 ± 7 ft. lbs.)
]]J[[ CAMSHAFT POSITION SENSOR SUPPORT INSTALLATION
1. Remove sealant from the camshaft position sensor support and cylinder head surfaces.
2. Apply the sealant to the camshaft position sensor support flange in a continuous bead as shown in the illustration.
Specified sealant: 3M(TM) AAD Part No. 8672, 3M(TM) AAD Part No. 8679/8678 or equivalent
NOTE: Install the camshaft position sensor support within 15 minutes after applying liquid gasket.
3. Install the camshaft position sensor support to the cylinder head.
CAUTION: Wait at least one hour. Never start the engine or let engine oil or coolant touch the adhesion surface during that time.
4. Tighten the camshaft position sensor support mounting bolts to the specified torque.
Tightening torque: 14 ± 1 Nm (120 ± 13 inch lbs.)
]]K[[ CAMSHAFT POSITION SENSING CYLINDER (INLET SIDE) INSTALLATION
1. Set the dowel pin of the inlet camshaft to the position (No. 1 cylinder at compression TDC) as shown in the illustration.
2. Tighten the camshaft position sensing cylinder mounting bolts to the specified torque.
Tightening torque: 22 ± 4 Nm (16 ± 3 ft. lbs.)
]]L[[ CAMSHAFT POSITION SENSING CYLINDER INSTALLATION
1. Set the dowel pin of the exhaust camshaft to the position (number 1 cylinder at compression TDC) as shown in the illustration.
NOTE: Use the force of the exhaust valve spring to rotate counterclockwise.
2. Install the vane (small) of the camshaft position sensing cylinder at an angle of approximately 45 degrees to the position of the dowel pin of the exhaust camshaft.
3. Tighten the camshaft position sensing cylinder mounting bolts to the specified torque.
Tightening torque: 22 ± 4 Nm (16 ± 3 ft. lbs.)
]]M[[ ROCKER COVER INSTALLATION
1. Apply sealant to the positions of the rocker cover gasket (8 areas) as shown in the illustration.
Specified sealant: 3M(TM) AAD Part No. 8672, 3M(TM) AAD Part No. 8679/8678 or equivalent
2. Install the rocker cover to the cylinder head.
3. Tighten the rocker cover mounting bolts to the specified torque.
Tightening torque: 3.5 ± 0.5 Nm (31 ± 4 inch lbs.)
]]N[[ RADIATOR UPPER HOSE CONNECTION
1. Insert each hose until it contacts the projection on the water outlet fitting.
2. Align the mating marks on the radiator hose and hose clamp, and then secure the radiator hose.
]]O[[ O-RING/OIL FEEDER CONTROL VALVE INSTALLATION
CAUTION:
^ Never re-use the O-ring.
^ Before installing O-ring, wind the tape with the soft adhesion (sealing tape) around the oil passages cut-out area of engine oil control valve to prevent the damage. If the O-ring is damaged, it can be the cause of oil leak.
1. Apply a small amount of engine oil to the O-ring and then install it to the oil control valve.
2. Assemble the engine oil control valve to the cylinder head.
3. Tighten the engine oil control valve mounting bolt to the specified torque.
Tightening torque: 11 ± 1 Nm (98 ± 8 inch lbs.)