SAFARI

ENGINE

Fig. 11

Fig. 12

Fig. 13

INSPECTION OF VALVE

1 Check-valve head thickness. If the valve head

thickness is less than specified value, replace

valve.

2 Check valve stem for wear and scores. Replace

valve having excessive scoring and wear on stem.

3 Check valve seat and valve stem for concentricity.

If runout exceeds specified limits, replace valve.

4 If contact pattern of valve is not around entire

seat, valve seat may be defective and machining

of valve seat is imperative.

5 After machining valve/valve seat cylinder head

parting surface, it is necessary to check length of

spring in installed condition (valve fully closed).

Spring length in installed conditionmust be within

specifications.

REMOVAL AND INSTALLATION OF VALVE GUIDES

1 Place cylinder head on suitablewooden supports.

2 Force guide out of cylinder head with drift, 2651

5890 05 01 for inlet valve guides and 2651 5890 05

02 for exhaust valve guides. Fig. 10.

3 Check parent bores for guides in cylinder head and if

necessary ream bore to next repair size.

4 Coat new valve guide and its bore in the cylinder

headwithgraphiteoil. Positionvalveguide incylinder

head bore with taper on the out side diameter at

bottom. Circular grooves arecut onout sidediameter

of exhaust valve guides for identification.

5 Slide spacer, 2651 5890 05 03 over valve guide.

6 Install inlet valve guide with drift, 2651 5890 05 01

and exhaust valve guidewith drift,

2651 5890 05 02. Fig. 11 & 12.

NOTE

It is advisable to use suitable press for removal and

installing valve guides in cylinder head.

7 Above drift with spacer ensures the dimension

between valve spring seat and valve guide tip.

However, it should be ascertained by physical

checking.

8 Ream inside diameter of inlet valve guides with

reamer 636 589 02 53 and exhaust valve guide

with reamer 2576 5890 02 02. Fig 13 & 14.