User Manual

EM -42 ENGINE MECHANICAL SYSTEM

3. Install the valve seat using the caulking tool body (1)

and locking ring (2).

CAUTION

Press the valve seat (3) with the chamferred side

of the locking ring. And then, caulk it to the cylin-

der head as the ring faces the other side.

Installing Caulking

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4. Grind the seat width (A) and valve sinkage (B) to be

within the standard.

Valve and valve seat should touch evenly all over the

surface.

Valveseatwidth(A)

Reference: 2.6~3.0mm (Intake)

1.8~2.2mm (Exhaust)

Limit: 3.6mm (Intake)

2.8mm (Exhaust)

Valve sinkage (B)

Reference: 1.5mm

Limit: 1.2mm

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5. Apply the compound evenly over the valve seat sur-

face (1).

CAUTION

a. Valve stem (2) should be free from any

compound. Use the m edium mesh (mesh

between 120 and 150) compound at first

and finis h the grinding with the fi ne mesh

compound (above 200 mesh)

b. Mix the compound with some engine oil to

apply evenly.

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6. Place the valve on the valve seat using the valve lap-

per (1). Tap the valve with turning the valve slightly.

Clean the compound with diesel or equivalent. Apply

the engine oil and check whether the contact surface

is securely positioned.

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