For 1990-2009 cars

1. Inspect the diameter of the valve stem using a micrometer to check the clearance between the valve stem and the valve guide.

#### Specifications

• | The intake outer diameter is 5.465-5.480 mm (0.2152-0.2157 in).

• | The exhaust outer diameter is 5.440-5.455 mm (0.2142-0.2148 in).

2. Inspect the inner diameter of the valve guide using a bore gage (1), at least 1 place in the direction to the valve length.

#### Specifications

• | The intake inner diameter is 5.500-5.512 mm (0.2165-0.2170 in).

• | The exhaust inner diameter is 5.500-5.512 mm (0.2165-0.2170 in).

3. Inspect the clearance between the valve stem and the valve guide.

#### Specifications

• | The intake clearance is 0.020-0.047 mm (0.0008-0.0019 in).

• | The exhaust clearance is 0.0045-0.072 mm (0.0018-0.0028 in).

4. If a bore gage is not available, measure the clearance using a dial gage by moving the edge of the stem to the directions of (1, 2, 3).

• | The intake clearance is 0.14 mm (0.0055 in).

• | The exhaust clearance is 0.18 mm (0.0071 in).

5. If the measured value is over the limit, replace the valve stem or valve guide.