Kia Sedona (2008 year). Instruction — part 355

Length

Intake: 105.27 mm (4.1445 in.)

Exhaust: 105.50 mm (4.1535 in.)

5. Check the surface of the valve stem tip for wear. If the valve stem tip is worn, replace the valve.

3. Inspect valve seats

Check the valve seat for evidence of overheating and improper contact with the valve face.

If the valve seat is worn, replace cylinder head.

Before reconditioning the seat, check the valve guide for wear. If the valve guide is worn, replace
cylinder head. Recondition the valve seat with a valve seat grinder or cutter. The valve seat contact width
should be within specifications and centered on the valve face.

4. Inspect valve springs.

1. Using a steel square, measure the out-of-square of the valve spring.

2. Using a vernier calipers, measure the free length of the valve spring.

Valve spring

[Standard]

Free height: 43.86 mm (1.7267 in.)

Out-of-square: 1.5°

Fig. 114: Measuring Free Length Of Valve Spring
Courtesy of KIA MOTORS AMERICA, INC.

MLA

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2008 ENGINE Mechanical - Sedona

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1. Inspect MLA.

Using a micrometer, measure the MLA outside diameter.

MLA O.D.

Intake/Exhaust: 34.964-34.980 mm (1.3765-1.3771 in.)

2. Using a caliper gauge, measure MLA tappet bore inner diameter of cylinder head.

Tappet bore I.D.

Intake/Exhaust: 35.000-35.025 mm (1.3779-1.3789 in.)

3. Subtract MLA outside diameter measurement from tappet bore inside diameter measurement.

MLA to tappet bore clearance

[Standard]

Intake/Exhaust: 0.020-0.061 mm (0.0008-0.0024 in.)

[Limit]

Intake/Exhaust: 0.07 mm (0.0027 in.)

CAMSHAFT

1. Inspect cam lobes.

Using a micrometer, measure the cam lobe height.

Cam height

[Standard value]

Intake: 46.8 mm (1.8425 in.)

Exhaust: 45.8 mm (1.8031 in.)

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2008 ENGINE Mechanical - Sedona

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Fig. 115: Measuring Cam Lobe Height
Courtesy of KIA MOTORS AMERICA, INC.

If the cam lobe height is less than standard, replace the camshaft.

2. Inspect camshaft journal clearance.

1. Clean the bearing caps and camshaft journals.

2. Place the camshafts on the cylinder head.

3. Lay a strip of plastigage across each of the camshaft journal.

Fig. 116: Inspecting Camshaft Journal Clearance
Courtesy of KIA MOTORS AMERICA, INC.

4. Install the bearing caps. Refer to INSTALLATION.

CAUTION: Do not turn the camshaft.

2008 Kia Sedona

2008 ENGINE Mechanical - Sedona

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5. Remove the bearing caps.

6. Measure the plastigage at its widest point.

Bearing oil clearance

[Standard value]

Intake

No. 1 journal: 0.020-0.057 mm (0.0008-0.0022 in.)

No. 2, 3, 4 journal: 0.030-0.067 mm (0.0012-0.0026 in.)

Exhaust

No. 1 journal: 0.020-0.057 mm (0.0008-0.0022 in.)

No. 2, 3, 4 journal: 0.030-0.067 mm (0.0012-0.0026 in.)

Fig. 117: Measuring Plastigage At Its Widest Point
Courtesy of KIA MOTORS AMERICA, INC.

If the oil clearance is greater than maximum, replace the camshaft. If necessary, replace cylinder
head.

7. Completely remove the plastigage.

8. Remove the camshafts.

3. Inspect camshaft end play.

1. Install the camshafts. Refer to INSTALLATION.

2. Using a dial indicator, measure the end play while moving the camshaft back and forth.

2008 Kia Sedona

2008 ENGINE Mechanical - Sedona

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