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