SAFARI

ENGINE

Fig. 8

Fig. 9

Fig. 10

Fig. 7

GRINDING OF VALVES

1 Clean removed valves. Remove oil deposit, carbon,

etc.

2 Check valve for runout and damages Fig. 7. Valves

with bent stem or burnt heads should be replaced.

Noattempt shouldbemade tostraightenbent valves.

3 In case valve is free fromany defects other thanworn

out seat, it can be re-machined on a valve grinding

machine as follows

a. Clamp valve on valve grindingmachine jaws as close

as possible to valve head.

b. Adjust grinding angle on graduated scale to achieve

correct valve seat angle.

c. Feedvalve slowly towards grindingwheel until wheel

just touches valve head. Fig. 8.

d. Grind at low feed until valve seat is just clean all

around.

e. Valve stemtip canbe ground to 0.5mmmaximumto

clear pitting/wear on a valve grinder with suitable

attachment.

NOTE

Following the grinding, valve head thickness

should not be less than specified value.