VALVE CLEARANCE ADJUSTMENT

Valve - Valve Clearance, Adjust

Removal

1. Remove the timing belt. For additional information, refer to Timing Belt in this section.

Note

• Measure each valve's clearance at base circle with the lobe pointed away from the tappet, before removing the camshafts. Failure to measure all clearances prior to removing the camshafts will necessitate repeated removal and installation and wasted labor time.

2. Use a feeler gauge to measure each valve's clearance and record its location.

3. Remove the camshafts. For additional information, refer to Camshafts in this section.

Caution

• If the camshaft and valve tappets are to be reused, mark the location of the valve tappets to make sure that they are assembled in their original positions.

4. Remove the valve tappets from the cylinder head.

Note

• A midrange clearance is the most desirable:

• intake: 0.15 mm {0.006 in}

• exhaust: 0.3 mm {0.012 in}

• Select tappets using this formula: tappet thickness = measured clearance plus the base tappet thickness minus most desirable thickness.

5. Select tappets and mark installation location.

Installation

Note

• Lubricate the valve tappets with engine oil.

1. Install the valve tappets.

2. Install the camshafts. For additional information, refer to Camshafts in this section.

3. Confirm each valve's clearance at base circle with the lobe pointed away from the tappet.

4. Install the timing belt. For additional information, refer to Timing Belt in this section.