Valve Clearance Adjustment - General Procedures
Special Tools Tool Illustration Tool Name Tool Number Tappet hold-down tool 303-540 Tappet hold-down tool adaptor 303-540/02 Fan nozzle - air gun 303-590
Scheme 37
Scheme 37: Valve Clearance Adjustment - General Procedures
| CAUTION | Rotating the crankshaft in a counterclockwise direction may cause engine damage. Crankshaft journals are directional machined. Rotating the crankshaft counterclockwise can raise burrs on bearing surfaces, reducing engine life. |
| CAUTION | Camshaft lobes must be 180 degrees away from each valve tappet or valve clearance will be incorrect. |
Scheme 38
Scheme 39
Scheme 40
Scheme 41
- Remove the cover and disconnect the battery ground cable. Refer to «Specifications»(ref-312541) article.
- Check the valve clearances. See «Valve Clearance Check»(ref-312581-S15852170742009041400000) .
- Rotate the engine clockwise to position the camshaft lobe away from the valve tappet.
- Install the special tool 303-540, to the cylinder head. Tighten the 2 bolts to 10 Nm (7 lb.ft).
- Attach the special tool 303-540/02 to 303-540. Secure with the 2 wing nuts.
- Position the special tool to the tappet as shown.
- Using the special tool, compress the valve spring.
- Remove, clean and measure the shim. Surround the immediate working area with a cloth, to retain any loose shims displaced by the compressed air. Use the special tool 303-590, aimed at the edge of the shim, to lift it from the tappet. Note the position of each one.
- Install the new shim. Clean the components. Lubricate the shim with clean engine oil. Release and remove the special tools as required.
- Using the feeler gauge set, measure the clearance between the camshaft and the valve tappet.
- Repeat the above procedure for the remaining valves.
