1. Auxiliary equipment and attachments that car on, or associated with the engine.
Illustration shows a cylinder-head for a four cylinder, double overhead camshaft engine with the number off dismantled components. Some of these are parts that have to be removed to gain access to the cylinder-head. Others are the parts that are dismantled from the cylinder-head itself.
Following are the general points that relate to removing the cylinder-head from an engine while it is in the vehicle. These are not procedures –the procedures must be obtained from the particular vehicle’s service manuals. Some service manuals provided the procedures as detailed descriptions, other provide illustrations with dismantling sequences shown.
The components of fig.3.1 are labeled below:
1. Intake manifold, 2. gasket, 3. throttle body, 4. Fuel rail, 5. Fuel damper, 6. Fuel line, 7. Injector, 8. Valve cover, 9. Gasket, 10. Shim, 11. Bucket tappet, 12. Valve spring, 13. Valve guide, 14. Valve, 15. Spark-plug, 16. Intake camshaft, 17. Exhaust camshaft, 18. Cylinder head, 19. Gasket, 20. Shield, 21. Exhaust manifold, 22. Cylinder-head gasket, 23. Timing belt, 24.Tensioner, 25. Crankshaft pulley, 26-28. timing belt covers, 29. Gasket, 30. Camshaft pulleys, 31 Bearing cap, 32. gasket
Auxiliaries and attachments
2. Coolant: the coolant has to be drained from the radiator and also from the engine block. Unless the block is drained, coolant that remains in the engine will find its way into the cylinders when the cylinder-head is removed.
3. Coolant system: coolant hoses, thermostat and heater hoses have to be removed.
4. Air-intake system: the air cleaner or ducting is usually removed early in the procedure so that other parts are accessible.
5. Accelerator cable: the accelerator cable and electrical connections at the EFI throttle body will have to be removed.
6. Emission pipe and hoses: the position and connections of emission hoses and devices should be noted. Labels should be attached before removal so that the parts can be correctly reinstalled.
7. Ignition system: the spark-plug cables and the ignition coil packs which are attached to the engine will have to be removed. If there is a distributor, it’ll be removed.
8. Spark plugs: these are removed so that the crankshaft is easy to rotate.
9. Electrical connections: there are various electrical connections than the engine compartment that have to be disconnected. Multi pin connectors can only be connected one way, but other connections that are not obvious should be labeled.
10. Drive belts: the drive belts for the alternator and other auxiliaries are removed-tensioners may have to be released.
11. Fuel system parts: many of these have to be removed so that other parts are accessible.
External Mechanical Parts