SAFARI

ENGINE

Fig. 2

Fig. 1

Fig. 3

VALVES, VALVE GUIDES, VALVE SPRINGS, VALVE

SEATS

REMOVAL OF VALVES

(Cylinder head removed)

1 Place cylinder head on two suitable wooden

supports.

2 Press springs with help of valve spring compressor,

312 589 02 31 and support rail 312.589 03 31 duly

counter-supporting poppet of valve to be

removed. Fig. 1.

3 Remove lock halves from valve stem and remove

them out.

4 Remove spring retainer, springs and guide seal.

5 Remove washer between springs and cylinder

head.

6 Similarly remove remaining valves.

INSTALLATION OF VALVES

1 Clean valves, washers, springs, retainers and lock

halves.

2 Place cylinder head on two suitable wooden

supports.

3 Insert washer and springs.

4 Lubricate valve stem. Insert valve from below into

cylinder head. Install guide seal.

5 Place spring retainer over springs and compress

(after counter supporting poppet of valve to be

assembled) with support rail, 312 589 03 31 and

valve spring compressor, 312 589 02 31. Insert lock

halves with smaller diameter towards lower side

evenly in spring retainer and release pressure on

valve spring. Lift cylinder head and slightly tap

valve stems with a mallet to ensure that lock halves

have locked valve and spring retainer properly.

Take care that two halves are centrally located.

NOTE :

Ensure that distance from valve head to cylinder head

parting surface is within specifications.

6 Similarly install remaining valves.

MACHINING OF VALVE SEATS

Before proceeding for machining of valve seats, check

for following

a. Check guide bores for wear with ‘GO NO GO’

gauge, 636 589 00 21 for inlet valve guide bore

and 2576 5890 02 03 for exhaust valve guide bore.

Replace valve guides if ‘NO GO’ gauge passes

through bore.

b. Ensure that concentricity between valve seat and

valve guide bore is maintained within specified

limits. Fig. 3.