User Manual

EM -40 ENGINE MECHANICAL SYSTEM

10. Measure the inner diameter of valve guide and outer

diameter of valve stem. If the clearance exceeds the

limit, replace the valve guide.

Clearance between valve stem and valve guide

― Intake

Reference: 0.04~0.06mm

Limit: 0.15mm

― Exhaust

Reference: 0.07~0.10mm

Limit: 0.2mm

SUDE

M7107L

11. Check the contacting state of valve seat and valve.

a. Apply light blue coating on the valve surface.

b. Check the valve contacting state by pressing the

valvetothevalveseat.

CAUTION

Be ca

reful that valve does not turn, when valve

seat

is pressed by valve.

Normal Abnormal Abnormal

SUDEM7108L

c. Measure the seat contact area (A).

Area of the valve seat contact

― Intake

Reference: 2.8± 0.2mm

Limit: 3.6mm

― Exhaust

Reference: 2.0± 0.2mm

Limit: 2.8mm

SUDEM7109L