Cylinder Head Assembly: Specifications

INSPECT CYLINDER HEAD





a. Inspect for flatness.
Using a precision straight edge and feeler gauge, measure the surfaces contacting the cylinder block and the manifolds for warpage.
Maximum warpage: 0.10 mm (0.0039 inch)
If warpage is greater than maximum, replace the cylinder head.





b. Inspect for cracks.
Using a dye penetrant, check the combustion chamber, intake ports, exhaust ports and cylinder block surface for cracks.
If cracked, replace the cylinder head.





c. Using vernier calipers, measure the thread outside diameter of the cylinder head bolt.
Standard outside diameter: 9.770 - 9.960 mm (0.3846 - 0.3921 inch)
Minimum outside diameter: 9.70 mm (0.3819 inch)
If the diameter is less than minimum, replace the bolt.


INSTALL CYLINDER HEAD BOLTS

HINT:
- The cylinder head bolts are tightened in 2 progressive steps (steps (c) and (e)).
- If any cylinder head bolt is broken or deformed, replace it.





a. Apply a light coat of engine oil on the threads and under the heads of the cylinder head bolts.
b. Install the plate washer to the cylinder head bolt.
c. Install and uniformly tighten the 10 cylinder head bolts on one side of the cylinder head in several passes in the sequence, then do the other side.
Torque: 59 Nm (600 kgf-cm, 44 ft. lbs.)
If any one of the cylinder head bolts does not meet the torque specification, replace the cylinder head bolt.





NOTICE: Do not drop the plate washer for cylinder head bolt into portion A of the cylinder head. If dropped into portion A, the plate washer will pass through the cylinder head and cylinder block into the oil pan.





d. Mark the front of the cylinder head bolt head with paint.
e. Retighten the cylinder head bolts by 90° in the numerical order shown.
f. Check that the painted mark is now at a 90° angle to front.