Engine Code AAH Up to 11/94
Cylinder head and valvetrain, component layoutEngine code AAH up to 11.94
Notes: Valve guides, checking, refer to Valve Guide/Testing and Inspection/Procedures Testing and Inspection
Always replace seals and gaskets.
1. Bearing cap
Installation position, refer to Camshaft, Lifters and Push Rods/Camshaft, Engine/Service and Repair Service and Repair
2. 20 Nm (15 ft lb)
3. Camshaft
Removing and installing, refer to Camshaft, Lifters and Push Rods/Camshaft, Engine/Service and Repair Service and Repair
Checking axial clearance, refer to Camshaft, Lifters and Push Rods/Camshaft, Engine/Service and Repair Service and Repair
Maximum allowable axial clearance: 0.01 mm (0.0004 in)
4. Valve stem oil seal
Always replace
Replacing, refer to Valve Guide Seal/Service and Repair Service and Repair
5. Cylinder head
Resurfacing cylinder head, refer to Cylinder Head Assembly/Service and Repair Service and Repair
Refacing valve seats, refer to Valve Seat/Service and Repair Service and Repair
6. Oil seals
Always replace
Never apply grease to oil seals
Replacing, refer to Camshaft Oil Seal/Service and Repair Service and Repair
Toothed camshaft drive belt, removing and installing, refer to Toothed Belt/Service and Repair Service and Repair
7. Exhaust valve
Checking, refer to Valve, Intake/Exhaust/Testing and Inspection/Procedures [1][2]Testing and Inspection
8. Hydraulic valve lifter
Checking, refer to Lifter, Valve/Testing and Inspection/Procedures Testing and Inspection
Oil contact surfaces before installing
Store with cam lobe contact surface facing downward
9. Intake valve
Checking, Valve, Intake/Exhaust/Testing and Inspection/Procedures [1][2]Testing and Inspection