SAFARI

4 DLT ENGINE

CYLINDERHEAD

sing a straight edge and feeler gauge, check cylinder

head mating surface with crank case.

Refer Figures. 81 & 82

f unevenness exceeds permissible limits, replace

cylinder head.

CYLINDERHEADTOPANDBOTTOMSURFACERE-

MACHINING IN SERVICE IS NOT RECOMMENDED.

VALVES

lean valves. Remove adhering oil, carbon etc.

alves with burnt heads, excessive scoring and wear

on stem should be replaced.

heck valve head thickness. If it is less than 1 mm

replace valve.

heck valve seat run out with respect to valve stem.

efer Figure 83 If it exceed specified limit replace

valve. No attempt should be made to straighten bent

valves. If valve is free from any other defects except

worn out seat, then only it can be re-machined on

valve grinding machine as follows:

- Clamp valve on grinding machine jaws as close as

possible to valve head.

- Adjust grinding angle on graduated scale to achieve

correct valve seat angle.

- Feed valve slowly towards grinding wheel until wheel

just touches valve head.

- Grind at low feed until valve seat is just clean all

around.

Note:

After grinding valve head thickness should not be less

than 1 mm.

Fig. 81

Fig. 82

Fig. 83