Cylinder Head Torque and Sequence
General SpecificationsINSPECT CYLINDER HEAD
a. Inspect for flatness.
Using a precision straight edge and feeler gauge, measure the surface contacting the cylinder block and the manifolds for warpage.
Maximum warpage
If the warpage is greater than the maximum, replace the cylinder head.
b. Inspect for cracks.
Using a dye penetrate, check the combustion chamber, intake ports, exhaust ports and cylinder block surface for cracks.
If cracked, replace the cylinder head.
Tightening Procedures
INSTALL CYLINDER HEAD
a. Place the cylinder head on the cylinder block.
1) Place a new cylinder head gasket on the cylinder block surface with the lot No. upward.
NOTICE: Be careful of the installation direction.
2) Place the cylinder head quietly in order not to damage the gasket with the bottom part of the head.
b. Install the cylinder head bolts.
HINT:
- The cylinder head bolts are tightened in 2 steps (steps (2) and (4)).
- If any cylinder head bolt is broken or deformed, replace it.
1) Apply a light coat of engine oil on the threads and under the heads of the cylinder head bolts.
2) Using a 10 mm bi-hexagon wrench, install and uniformly tighten the 10 cylinder head bolts and plate washers in several passes, in the sequence shown.
Torque: 79 Nm (800 kgf-cm, 58 ft. lbs.)
If any one of the cylinder head bolts does not meet the torque specification, replace the cylinder head bolt.
3) Mark the front of the cylinder head bolt with paint.
4) Retighten the cylinder head bolts 90° in the numerical order shown.
5) Check that the painted mark is now at a 90° angle to the front.