Cylinder Head Assembly - 2.0L - Optima: Other Kia Optima III рестайлинг

MLA (Mechanical Lash Adjuster)

1. Inspect the MLA. Using a micrometer, measure the MLA outside diameter. MLA outer diameter: 31.964 ~ 31.980 mm (1.2584 ~ 1.2590 in.)
2. Using a caliper gauge, measure MLA tappet bore inner diameter of cylinder head. Tappet bore inner diameter: 32.000 ~ 32.025 mm (1.2598 ~ 1.2608 in.)
3. Subtract MLA outside diameter measurement from tappet bore inside diameter measurement.

MLA to tappet bore clearance

(Standard) : 0.020 ~ 0.061 mm (0.00078 ~ 0.00240 in.)

(Limit) : 0.070 mm (0.00275 in.)

Scheme 447

Scheme 448

Scheme 449

Scheme 450

1. Inspect the cam lobes. Using a micrometer, measure the cam lobe height. If the cam lobe height is less than standard, replace the camshaft. Cam height (Standard value) Intake : 44.10 ~ 44.30 mm (1.7362 ~ 1.7440 in.) Exhaust : 44.90 ~ 45.10 mm (1.7677 ~ 1.7756 in.)
2. Inspect the camshaft journal clearance. Clean the bearing caps and camshaft journals. Place the camshafts on the cylinder head. Lay a strip of plastigage across each of the camshaft journal. Install the bearing caps. CAUTION: Do not turn the camshaft. Remove the bearing caps. Measure the plastigage at its widest point. Bearing oil clearance (Standard value) Intake : No. 1 : 0.022 ~ 0.057 mm (0.00087 ~ 0.00224 in.) No. 2, 3, 4, 5 : 0.045 ~ 0.082 mm (0.00177 ~ 0.00323 in.) Exhaust: No. 1 : 0 ~ 0.032 mm (0 ~ 0.00126 in.) No. 2, 3, 4, 5 : 0.045 ~ 0.082 mm (0.00177 ~ 0.00323 in.) (Limit) Intake: No. 1 : 0.090 mm (0.00354 in.) No. 2, 3, 4, 5 : 0.120 mm (0.00472 in.) Exhaust : No. 1 : 0.090 mm (0.00354 in.) No. 2, 3, 4, 5 : 0.120 mm (0.00472 in.) If the oil clearance is greater than maximum, replace the camshaft. If necessary, replace cylinder head. Completely remove the plastigage. Remove the camshafts.
3. Inspect the camshaft end play. Install the camshafts. Using a dial indicator, measure the end play while moving the camshaft back and forth. Camshaft end play (Standard value) : 0.04 ~ 0.16 mm (0.0016 ~ 0.0063 in.) (Limit) : 0.20 mm (0.0078 in.) If the end play is greater than maximum, replace the camshaft. If necessary, replace cylinder head. Remove the camshafts.

Exhaust Camshaft Bearing

Refer to EXHAUST CAMSHAFT BEARING .