Assembly and Installation
CAUTION:
- When installing rocker arms, camshaft and oil seal, lubricate contacting surfaces with new engine oil.
- When tightening cylinder head bolts and rocker shaft bolts, lubricate bolt threads and seat surfaces with new engine oil.
ASSEMBLY
1. Install valve component parts.
NOTE:
- Always use new valve oil seal.
- Before installing valve oil seal, install inner valve spring seat.
- Install outer valve spring (uneven pitch type) with its narrow pitch side toward cylinder head side.
- After installing valve component parts, use plastic hammer to lightly tap valve stem tip to assure a proper fit.
2. Install camshaft, placing knock pin towards front of engine and in the top position.
NOTE: Apply engine oil to camshaft when mounting onto cylinder head.
3. Install camshaft brackets.
Camshaft bearing cap torque specification
27 - 30 ft. lb. (37 - 41 Nm)
NOTE: Front mark is punched on the camshaft brackets.
4. Install rocker shaft with rocker arms.
NOTE: Install retainer with cutout facing the direction shown in the figure.
Tightening Sequence:
5. Tighten bolts as shown in figure.
INSTALLATION
1. Set No. 1 piston at TDC on its compression stroke as follows:
a. Align mark on crankshaft pulley with "0°" position and confirm that distributor rotor head is set as shown in figure.
b. Confirm that knock pin on camshaft is set at the top.
Tightening Sequence:
2. Install cylinder head with new gasket and tighten cylinder head bolts in numerical order shown. Tightening procedure:
CAUTION: Do not rotate crankshaft and camshaft separately, or valves will hit piston heads.
a. Tighten all bolts to 29 Nm (22 ft. lbs.).
b. Tighten all bolts to 78 Nm (58 ft. lbs.).
c. Loosen all bolts completely.
d. Tighten all bolts to 29 Nm (22 ft. lbs.).
e. Turn all bolts 80 - 85° clockwise with an angle wrench. If an angle wrench is not available, tighten all bolts to 74 - 83 Nm (54 - 61 ft. lbs.).
3. Set chain on camshaft sprocket by aligning each mating mark. Timing Components Then install camshaft sprocket to camshaft.
4. Tighten camshaft sprocket bolt.
5. Install rubber plugs as follows:
a. Apply liquid gasket to rubber plugs.
- Rubber plugs should be replaced with new ones.
- Rubber plugs should be installed within 5 minutes of applying liquid gasket.
b. Install rubber plugs, then move them with your fingers to uniformly spread the gasket on cylinder head surface.
- Rubber plugs should be installed flush with the surface.
- Do not start the engine for 30 minutes after installing rocker cover.
- Wipe away excessive liquid gasket from cylinder head top surface.
6. Check hydraulic valve lifter.
a. Push hydraulic valve lifter forcefully with your finger.
NOTE: Be sure to check it with rocker arm in its free position.
b. If valve lifter moves more than 1 mm (0.04 inch), air may be inside of it.
c. Bleed air off by running engine at 1,000 RPM under no load for about 20 minutes.
d. If hydraulic valve lifters are still noisy, replace them and bleed air off again in the same manner as in step c.
7. Install rocker cover. Be sure to avoid interference between rocker cover and rocker arm.
8. Tighten bolts as follows:
a. Tighten two bolts to 3 Nm (26 inch lbs.) temporarily in order shown in figure.
b. Then tighten bolts to 7 - 11 Nm (61 - 95 inch lbs.) in order shown in figure.
9. Install any parts removed.