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Home >> Kia >> 2012 >> Optima L4-2.4L >> Repair and Diagnosis >> Specifications >> Mechanical Specifications >> Engine >> Cylinder Head Assembly
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Cylinder Head Assembly





Cylinder Head

Install cylinder head bolts.

Do not apply engine oil on the the cylinder head bolts.

Using the SST(09221-4A000), tighten the cylinder head bolts and plate washers, in several passes, in the sequence shown.

Tightening torque 32.4 - 36.3 Nm (3.3 - 3.7 kgf.m, 23.9 - 26.8 lb-ft) + 90 - 95° + 90 - 95°






CAUTION: Always use new cylinder head bolt.

SURFACE VARIATION - WARPAGE






Camshaft Bearing

Install camshaft bearing caps (A) in their proper locations.

Tightening order
Group A -> Group B -> Group C.

Tightening torque :

Step 1
M6 5.9 N.m (0.6 kgf.m, 4.3 lb-ft)
M8 14.7 N.m (1.5 kgf.m, 10.8 lb-ft)

Step 2
M6 10.8 - 12.7 N.m (1.1 - 1.3 kgf.m, 8.0 - 9.4 lb-ft)
M8 27.5 - 31.4 N.m (2.8 - 3.2 kgf.m, 20.3 - 23.1 lb-ft)






For Intake Manifold specifications, refer to Specifications. Specifications

For Exhaust Manifold specifications, refer to Specifications. Specifications

For Camshaft Gear/Sprocket specifications, refer to Specifications. Specifications