Kia Stinger: Cylinder Head Assembly / Cylinder Head

Use fender covers to avoid damaging painted surfaces.

To avoid damaging the cylinder head, wait until the engine coolant temperature drops below normal temperature before removing it.

When handling a metal gasket, take care not to fold the gasket or damage the contact surface of the gasket.

To avoid damage, unplug the wiring connectors carefully while holding the connector portion.

Using triple square wrench, uniformly loosen and remove the 10 cylinder head bolts, in several passes, in the sequence shown. Remove the 10 cylinder head bolts and plate washers.

Head warpage or cracking could result from removing bolts in an incorrect order.

Lift the cylinder head (A) from the dowels on the cylinder block and place the cylinder head on wooden blocks on a bench.

Be careful not to damage the contact surfaces of the cylinder head and cylinder block.

Remove the cylinder head gasket (A).

Using SST (09222-3K000, 09222-3K100), compress the valve spring and remove retainer lock.

Remove the spring retainer.

Remove the valve spring.

Remove the valve.

Using needle-nose pliers, remove the valve stem seal.

Do not reuse old valve stem seals.

Flatness of cylinder head gasket surface

Standard : Less than 0.05 mm (0.0019 in.) for total area

Less than 0.02 mm (0.0007 in.) for a section of 100 mm (3.9370 in.) X 100 mm (3.9370 in.)

Flatness of manifold mounting surface (Intake/Exhaust)

Standard : Less than 0.10 mm (0.0039 in.)

Using a caliper gauge, measure the inside diameter of the valve guide.

Using a micrometer, measure the diameter of the valve stem.

Subtract the valve stem diameter measurement from the valve guide inside diameter measurement.

If the clearance is greater than maximum, replace the valve or cylinder head.

Check the valve is ground to the correct valve face angle.

Check that the surface of the valve for wear.

If the valve face is worn, replace the valve.

Check the valve head margin thickness.

If the margin thickness is less than minimum, replace the valve.

Check the valve length.

Check the surface of the valve stem tip for wear.

If the valve stem tip is worn, replace the valve.

Check the valve seat for evidence of overheating and improper contact with the valve face. Replace the cylinder head if necessary.

Check the valve guide for wear. If the valve guide is worn, replace the cylinder head.

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

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

If the free length is not as specified, replace the valve spring.

MLA outer diameter :

31.964 - 31.980 mm (1.2584 - 1.2590 in.)

Tappet bore inner diameter :

32.000 - 32.025 mm (1.2598 - 1.2608 in.)

MLA to tappet bore clearance

[Standard] : 0.020 - 0.061 mm (0.00078 - 0.00240 in.)

Using SST (09222-4A000), push in a new oil seal.

Do not reuse old valve stem seals. Incorrect installation of the seal could result in oil leakage past the valve guides.

Install the valve, valve spring and spring retainer.

Place valve springs so that the side coated with enamel faces toward the valve spring retainer and then installs the retainer.

Using the SST (09222-3K000, 09222-3K100), compress the spring and install the retainer locks. After installing the valves, ensure that the retainer locks are correctly in place before releasing the valve spring compressor.

Lightly tap the end of each valve stem two or three times with the wooden handle of a hammer to ensure proper seating of the valve and retainer lock.

MLA can be reinstalled in its original position.

However, the valve lash clearances must be rechecked and adjusted accordingly before the cylinder head is installed onto the cylinder block.

Refer to General information in EM section for Valve Clearance checking and adjustment procedure.

Always use new cylinder head bolts. Cylinder head bolts are torque-to-yield bolts designed to be permanently elongated beyond the state of elasticity when torqued, so if the bolts are removed and reused, it may cause the bolts to break or fail to maintain clamping force.

Thoroughly clean all parts to be assembled.

Always use a new head and manifold gasket.

The cylinder head gasket is a metal gasket. Take care not to bend it.

Rotate the crankshaft, set the No.1 piston at TDC.

Tightening torque

Bolts :14.7 - 19.6 N·m (1.5 - 2.0 kgf·m, 10.8 - 14.5 lb·ft)

Nuts :19.6 - 23.5 N·m (2.0 - 2.4 kgf·m, 14.5 - 17.4 lb·ft)

The sealant locations on cylinder head gasket and cylinder block must be free of engine oil and etc.

Apply liquid gasket (Loctite 5900H or equivalent) on the cylinder block top surface before assembling the cylinder head gasket.

Install the cylinder head gasket (A) on the cylinder block.

Be careful of the installation direction.

Apply liquid gasket (Loctite 5900H or equivalent) on the cylinder head gasket top surface after assembling the cylinder head gasket.

After applying liquid gasket, assemble the cylinder head in 5 minutes.

Remove the extruded sealant after assembling the cylinder head assembly.

Do not apply engine oil on 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 N·m (3.3 - 3.7 kgf·m, 23.9 - 26.8 lb·ft) + 90 - 95° + 90 - 95°

Always use new cylinder head bolts. Cylinder head bolts are torque-to-yield bolts designed to be permanently elongated beyond the state of elasticity when torqued, so if the bolts are removed and reused, it may cause the bolts to break or fail to maintain clamping force.