Daewoo D1146, Maintenance Manual

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D1146/D1146TI/DE08TIS
MAINTENANCE MANUAL
50
Printed in Jan. 2001 PS-MMA0415-E1A
(3) Inspection of valve and valve guide
1) Valve
After cleaning valve with fuel, check it.
z
Valve stem outer diameter
Measure the valve stem outer diameter
at 3 positions (top, middle, and bottom),
and check for any wear and if beyond
the limit value, replace the valve.
Dimension
Description
Standard Limit
Intake valve stem
φ
8.950
∼ φ
8.970 mm
φ
8.93 mm
Exhaust valve stem
φ
8.935
∼ φ
8.955 mm
φ
8.91 mm
z
Valve seat contacting faces
Check the valve seat contact surface
for any crack and wear, and if
necessary, correct with grinding
paper, and if excessive, replace it.
z
Valve head thickness
Measure the thickness of valve head
and if beyond the limit value, replace
the valve
Dimension
Description
Standard Limit
Intake valve 2.7 mm 1 mm or less
Exhaust valve 2.2 mm 1 mm or less
2) Valve guide
z
Insert a valve into cylinder head and
measure the clearance between
valve guide and valve by valve
movement. If the clearance is
excessive, measure the valve and
replace the excessively worn valve
M1076
Measuring
Point