Daewoo Musso. Manual — part 105
OM600 ENGINE MECHANICAL 1B3-127
CHECK AND MACHINING OF VALVES
Preceding Works : Removal of cylinder head
Removal of the vale spring
Removal of the valve
I Valve Length
W Camshaft Cam Basic Diameter
X Distance (Camshaft Basic Bore - Valve Stem)
Y Half Camshaft Basic Bore Diameter
Z Distance (Cylinder Head Cover Parting Surface -
Valve Stem)
1B3-128 OM600 ENGINE MECHANICAL
Intake Valve
Exhaust Valve
Item
Valve Disc Diameter ‘d’
Valve Disc Height ‘h’
Setting Angle “
a
” or Machining the Valve
Valve Stem Diameter ‘d1’
Valve Length ‘I’
Intake Valve
37.90 - 38.10 mm
1.7 mm
45°
7.955 - 7.970 mm
106.20 - 106.60 mm
105.30 - 105.70
0.03 mm
Exhaust Valve
34.90 - 35.10 mm
1.7 mm
45°
9.945 - 8.960 mm
106.20 - 106.60 mm
105.30 - 105.70 mm
0.03 mm
Standard
Repair
Max. Permis Sible Runout at Valve Stem and Valve Seat
W = 38.0 ± 0.2mm
Matching Valves
Camshaft Cam Basic Dia.
Size (x)
Size (x)
Size (x)
19.5 - 20.3mm
20.4 - 21.4mm
21.4 - 21.97mm
W = 36.6 ± 0.2mm
Camshaft Cam Basic Dia.
19.5 - 20.1mm
20.2 - 21.2mm
21.2 - 21.97mm
Valve to be Used
Use machined valve,
if needed
new repair valve
I = 105.5 ± 0.2mm
Reuse valve
Use standard size
valve
I = 106.4 ± 0.2mm
OM600 ENGINE MECHANICAL 1B3-129
Tools Required
001 589 32 21 00 Dial Gauge
Checking and Machining
1. Clean the valves and do visual check.
Valves with wobbled valve disc, with worn or scored valve
stem should be replaced.
2. Measure valve disc height ‘h’.
Service data
Intake
Exhaust
1.7 ± 0.15 mm
1.7 ± 0.15 mm
3. Machine the valve.
Notice
Pay attention to setting angle ‘
a
’.
Commercial Tool
Valve corn grinding machine
4. Measure radial runout between valve stem and valve seat.
Limit
Max. 0.03mm
Dial Gauge 001 589 32 21 00
1B3-130 OM600 ENGINE MECHANICAL
10. Measure distance ‘z’ (cylinder head cover parting surface
- valve stem).
5. Clean the vales, valve seats and valve guides.
6. Coat the valve stem with oil and insert it into valve guide.
7. Insert the valves (1) into the valve guides according to
marking.
8. Measure amount by which the valve arrears ‘a’.
Arrears ‘a’
0.1 - 0.7 mm
Notice
If out of standard, replace the valve seat ring.
9. Measure camshaft cam basic diameter (w).
Diameter ‘w’
38 ± 0.2 mm
or 37.6 ± 0.2 mm
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