Manifolds, Cylinder Head & Valves

exhaust valve is just closing. No. 1 piston is now at T.D.C. on compression stroke.

c)Slacken off the valve adjusting screw locknuts and turn the screw until to the specified clearance (inlet 0.25mm, exhaust 0.3mm) feeler gauge is just snug fit between the end of the valve stem and the valve lever.

d)Hold the screw in this position and tighten the locknut.

e)Similarly adjust the valve clearance of the remaining cylinder in firing order by bringing each piston to top dead center on the compression stroke in sequence.

4.CYLINDER HEAD

4a.REMOVAL

1)Remove the manifolds as detailed earlier.

2)Remove the valve rocker arm shaft assembly as detailed earlier in para 3a.

3)Remove the push rods and identify them so they can be installed in their original positions.

4)Remove the thermostat housing by pass hose.

5)Remove the three bolts then remove the thermostat housing.

6)Remove the fuel injector pipes. It is not advisable to disconnect them at the injector only. They may become distorted.

7)Remove the cylinder head bolts progressively in the reverse order to the tightening sequence Ref. Fig.4.

8)Remove the cylinder head and gasket.

NOTE:

1.Clean the Engine externally. Mark dismantled parts such as valves, Valve stem guides and springs and place them on a table in removal order to facilitate reassembly.

2.Always cap all exposed openings of injector pump, injector pipes, fuel lines and nozzle holders to prevent entry of dirt into the fuel system.

3.To avoid warpage do not remove cylinder head bolts unless the engine has cooled down.