Cylinder Head Assembly: Service and Repair

Replacement

Warning
^ Release the fuel pressure.
^ Keep sparks and open flame away from the fuel area.

Caution
^ Obtain the code number and deactivate the audio anti-theft system before disconnecting the battery.
^ Position the hose clamp in the original location on the hose, and squeeze the clamp lightly with large pliers to ensure a good fit.





1. Disconnect the negative battery cable.
2. Drain the engine coolant.
3. Remove in the order shown in the image, referring to Removal Note.
4. Install in the reverse order of removal, referring to Installation Note.





Removal Note
Cylinder head bolt

1. Loosen the cylinder head bolts in two or three steps in the order shown in the image.
2. Remove the cylinder head bolts.





Installation Note
Cylinder head bolt
1. Apply clean engine oil to the bolt threads and seat faces.
2. Install the cylinder head bolts.
3. Tighten the cylinder head bolts in two or three steps in the order shown in the image.

Tightening torque:
76-81 N.m (7.7-8.3 kgf.m, 56-60 ft.lbf)





Legend
1. Camshaft pulley
2. Camshaft
3. HLA
4. Seal plate
5. Thermostat housing
6. Cylinder head bolt
7. Cylinder head
8. Cylinder head gasket
9. Valve keeper
10. Valve spring seat, upper
11. Valve spring
12. Valve spring seat, lower
13. Valve
14. Valve seal
15. Valve guide





Disassembly Note
Cylinder head bolt
1. Loosen the cylinder head bolts in two or three steps in the order shown in the image.
2. Remove the cylinder head bolts.





INSPECTION / REPAIR
CYLINDER HEAD
1. Inspect the cylinder head for damage, cracks, and leakage of water and oil. Replace the cylinder head if necessary.
2. Measure the cylinder head distortion in the six directions shown in the image.

Distortion: 0.15mm (0.006 in ) max.

Caution
^ Before grinding the cylinder head, check the following and repair or replace the cylinder head as necessary.

Sinking of valve seats
Damage of manifold contact surface
Camshaft oil clearances and end play





3. If the cylinder head distortion exceeds specification, grind the cylinder head surface. If the cylinder head height is not within specification, replace it.

Height: 133.8-134.0 mm 5.268-5.275 in)
Grinding: 0.20mm -0.008 in) max.





4. Measure the manifold contact surface distortion in the four directions shown in the image.

Distortion: 0.15mm (0.006 in) max.

5. If distortion exceeds specification, grind the surface or replace the cylinder head.





ASSEMBLY
CYLINDER HEAD





Cylinder Head Gasket
1. Remove all foreign material from the top of the cylinder block.
2. Place the new cylinder head gasket in position.





Cylinder Head
1. Install the cylinder head.
2. Apply clean engine oil to the bolt threads and seat faces.
3. Tighten the cylinder head bolts in two or three steps in the order shown.

Tightening torque:
76-81 N.m (7.7-8.3 kgf.m, 56-60 ft.lbf)