Cylinder Head Assembly: Service and Repair

1. Release fuel system pressure, refer to Powertrain Management/Fuel Delivery and Air Induction/Service and Repair.
2. Disconnect battery ground cable.
3. Remove timing belt, refer to TIMING BELT. Reinstall engine mount No. 3 after timing belt removal.

Fig. 3 Engine Electrical Connector Locations:

Fig. 4 Engine Fuel & Heater Hose Locations:

4. Disconnect electrical connectors Fig. 3, then hoses Fig. 4.

Fig. 13 Cylinder Head & Related Component Locations:

Fig. 14 Cylinder Head Bolt Removal Sequence:

5. Remove engine components in the numbered sequence shown in Fig. 13, noting the following:
a. Loosen all intake manifold retaining bolts in two or three steps to prevent stress warpage of the mating surfaces.
b. Remove camshafts, refer to Engine/Camshaft, Lifters and Push Rods/Lifter, Valve/Adjustments.
c. Loosen the cylinder head bolts in two or three steps in the order shown in Fig. 14.

Fig. 15 Oil Control Plug Projection Height Measurement:

Fig. 16 Cylinder Head Bolt Tightening Sequence:

Fig. 17 Cylinder Head Bolt Paint Mark Application:

Fig. 18 Right Cylinder Head Cover Tightening Sequence:

Fig. 19 Left Cylinder Head Cover Tightening Sequence:

6. Install cylinder head(s) by reversing numbered sequence shown in Fig. 13, noting the following:
a. Measure the amount of oil control plug projection from the deck of the cylinder block, Fig. 15. Oil control plug projection should be 0.315-0.354 inch. If projection is not within specifications, remove the oil control plug, then tap in a new one to the specified height. Replace oil control plug O-ring when cylinder head is removed.
b. Measure the length of each cylinder head retaining bolt from the shoulder to the end. Measurement should be between 5.26-5.29 inch. Replace bolt if not within specifications.
c. Torque cylinder head retaining bolts in two or three steps in sequence shown in Fig. 16 to 17-19 ft. lbs. Apply a paint mark to each cylinder head bolt as shown in Fig. 17. Using the marks as a reference point, tighten an additional 90° turn in sequence shown in Fig. 16. Further tighten each bolt another 90° turn.
d. Torque the cylinder head cover retaining bolts in sequence shown in Figs. 18 and 19 to 43-78 inch lbs.