Cylinder Head Removal/Disassemble/Installation/Camshaft Inspect

CYLINDER HEAD REMOVAL

NOTE:
Service manual page references are to the 1999 SLX Service Manual and the 1999 SLX Fuel & Emissions Manual.

1. Remove the hood (see page 8F-11 of the service manual).

2. Disconnect the negative cable from the battery.

3. Remove the air cleaner (see page 6E-476 of the fuel & emissions manual).

4. Remove the radiator upper fan shroud (see page 6B-9 of the service manual).

5. Remove the drive belt tensioner and the drive belt (see page 6B-12 of the service manual).

6. Remove the cooling fan assembly (4 bolts) and the cooling fan pulley.

7. Remove the power steering pump (see page 2A-28 of the service manual).

8. Drain the engine coolant (see page 6B-6 of the service manual).

9. Drain the engine oil.

10. Remove the crankshaft pulley:

^ Attach the flange holder (T/N 07RAB-TB4010B) with the holder handle (T/N 07JAB-001020A) to the pulley.

^ While holding the pulley with the tool, remove the pulley bolt and the pulley.

^ Install the pulley bolt. (When needed later, this will allow you to turn the crankshaft by hand.)

11. Remove the cylinder head covers (see pages 6A-18 and 6A-21 of the service manual).

12. Remove the timing belt (see TIMING BELT REMOVAL).

13. Remove the common chamber (see page 6A-24, steps 2 thru 8, of the service manual).

14. Remove the exhaust manifolds (see pages 6A-26 and 6A-27 of the service manual).

15. Remove the cylinder heads:





^ Loosen the head bolts in the sequence shown.

^ Remove and discard the head bolts.

^ Remove the cylinder heads.

CYLINDER HEAD DISASSEMBLY

NOTE:
^ Whether you're rebuilding a cylinder head or assembling a new one, mark the position of each camshaft bearing cap and valve train part before you remove it. When you assemble the head, install the marked parts in their original positions.

Service manual page references are to the 1999 SLX Service Manual.

1. Remove the camshaft drive gear, camshafts, and valve train parts, as needed, for inspection or repair (see pages 6A-52 and 6A-53 of the service manual).

2. Clean the bare head to remove all varnish, carbon, and grime.

3. Check the cylinder head and gasket, and repair the head if needed (see page 6A-53 of the service manual).

CAMSHAFT INSPECTION

NOTE:
Service manual page references are to the 1999 SLX Service Manual.

1. Inspect the camshaft journal oil clearances and thrust clearances (see page 6A-65 of the service manual). If any clearances are not within specification, replace the cylinder head(s).

2. Inspect the camshaft lobe heights, journal diameters, and runout (see pages 6A-64 and 6A-65 of the service manual). If any measurement is not within specification, replace the camshaft(s).

3. If any camshaft or camshaft drive gear is seized, or if the engine is seized from other mechanical causes, inspect the camshaft drive gear dowel pins and the camshaft gears.





^ Check the dowel pins for damage, and replace the drive gear assemblies as needed.





^ Inspect the camshaft gears for movement and correct positioning on the camshafts. If the gears are not stationary, or if their positions are incorrect, replace the camshaft(s).

CYLINDER HEAD INSTALLATION

NOTE:
Service manual page references are to the 1999 SLX Service Manual.

1. After making the needed inspections or repairs, install the cylinder heads with new head bolts (see page 6A-37 of the service manual).

2. Install all parts you removed in the reverse order of removal (see page 6A-30 of the service manual).