Cylinder Head Removal/Installation - LH

CYLINDER HEAD REMOVAL/INSTALLATION - LH, 3.0L

















Removal

CAUTION:During engine repair procedures, cleanliness is extremely important. Any foreign material, (including any material created while cleaning gasket surfaces) that enters the oil passages, coolant passages or the oil pan, can cause engine failure.
1. With the vehicle in NEUTRAL, position it on a hoist. See Lifting.

2. Remove the lower intake manifold. See - Lower Intake Manifold Removal/Installation.

3. Remove the coolant bypass tube.

4. Remove the LH camshafts. See - Camshafts Removal/Installation - LH.

5. Remove the camshaft roller followers.

CAUTION:The camshaft roller followers must be installed in their original positions. If not installed in their original positions, severe engine damage may occur.
6. Remove the hydraulic lash adjusters.

CAUTION:The hydraulic lash adjusters must be installed in their original positions. If not installed in their original positions, severe engine damage may occur.
7. Remove the LH exhaust manifold. See - Catalytic Converter Removal/Installation - LH.

8. Remove the 4 upper radiator support bracket bolts.

9. Remove the oil level indicator.

10. Remove the stud bolt and remove the oil level indicator tube.

- Remove and discard the O-ring seal.





11. Remove the 3 bolts and position the coolant pump aside.





12. Remove the bolts in the sequence shown.

NOTE:New cylinder head bolts must be installed. They are torque-to-yield designed and cannot be reused.
13. Remove the cylinder head and support the cylinder head on a bench with the head gasket up.

- Discard the gasket and bolts.

14. Inspect all areas of the deck face with a straightedge and feeler gauge. The cylinder head must not have depressions deeper than 0.0254 mm (0.001 in) across a 38.1 mm (1.5 in) square area, or scratches more than 0.0254 mm (0.001 in).

NOTE:The straightedge used must be flat within 0.0051 mm (0.0002 in) per foot of tool length.

Installation

1. Use a plastic scraping tool to remove all traces of the head gasket.

- Clean all surfaces with metal surface prep.

CAUTION:Do not use metal scrapers, wire brushes, power abrasive discs or other abrasive means to clean the sealing surfaces. These tools cause scratches and gouges which make leak paths.
2. Position a new gasket and the cylinder head.





3. Install the bolts and tighten in 6 stages in the sequence shown.

- Stage 1: Tighten to 40 Nm {4.1 kgf-m, 30 ft-lbf}.
- Stage 2: Tighten bolts 90 degrees.
- Stage 3: Loosen 1 full turn.
- Stage 4: Tighten to 40 Nm {4.1 kgf-m, 30 ft-lbf}.
- Stage 5: Tighten bolts 90 degrees.
- Stage 6: Tighten bolts 90 degrees.

NOTE:New cylinder head bolts must be installed. They are torque-to-yield designed and cannot be reused.
4. Position the coolant pump and install the bolts.

- Tighten to 10 Nm {1.0 kgf-m, 89 in-lbf}.

5. Install the oil level indicator tube and stud bolt.

- Tighten to 10 Nm {1.0 kgf-m, 89 in-lbf}.

NOTE:Install a new O-ring seal and lubricate with clean engine oil.
6. Install the oil level indicator.

7. Install the 4 upper radiator support bracket bolts.

- Tighten to 10 Nm {1.0 kgf-m, 89 in-lbf}.

8. Install the LH exhaust manifold. See - Catalytic Converter Removal/Installation - LH.

9. Install the hydraulic lash adjusters.

- Lubricate the hydraulic lash adjusters with clean engine oil.

CAUTION:The hydraulic lash adjusters must be installed in their original positions. If not installed in their original positions, severe engine damage may occur.
10. Install the camshaft roller followers.

- Lubricate the camshaft roller followers with clean engine oil.

CAUTION:The camshaft roller followers must be installed in their original positions. If not installed in their original positions, severe engine damage may occur.
11. Install the camshafts. See - Camshafts Removal/Installation - LH.

12. Install the coolant bypass tube.

13. Install the lower intake manifold. See - Lower Intake Manifold Removal/Installation.