Daewoo Musso. Manual — part 106

OM600 ENGINE MECHANICAL 1B3-131

11. The distance ‘x’ (camshaft basic bore - valve stem).

‘x’ = ‘z’ - ‘y’.

Determine the valve to use according to this measurement
(See ‘matching valves’)

Example)

Measured value ‘w’ = 38.2 mm

Measured value ‘z’ = 36.5 mm

Value

‘y’ = 15.5 mm

‘x’ = 36.5 - 15.5 = 21.0mm

In this case according to ‘Matching valves’ table, the
installed valve may be used.

1B3-132 OM600 ENGINE MECHANICAL

MACHINING OF VALVE SEAT

Preceding Work : Removal of prechamber

Removal and inspection of valve, replace if necessary
Inspection of valve guide, replace if necessary

1 Valve
2 Valve Seat Ring
3 Cylinder Head
4 Valve Guide

a Valve Seat Angle
b Valve Seat Free Angle

OM600 ENGINE MECHANICAL 1B3-133

Service Data

Item

Valve Arrears ‘a’

Valve Seat Width ‘b’

Valve Seat Angle ‘

a

’

Valve Seat Free Angle ‘

b

’

Permissible Radial Runout

Valve Length ‘I’

Intake

0.1 - 0.7 mm

1.2 - 1.7 mm

45°

65°

0.03 mm

106.20 - 106.60 mm

105.30 - 105.70 mm

Exhaust

0.1 - 0.7 mm

1.5 - 2.0 mm

45°

65°

0.03 mm

106.20 - 106.60 mm

105.30 - 105.70 mm

Standard

Repair

w = 38.0 ± 0.2 mm

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 = 37.6 ± 0.2 mm

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

use pair valve

1 = 105.5 ± 0.2mm

Reuse valve

Use standard size

valve

I = 106.4 ± 0.2mm

Commercial Tools

Hunger

D-8000 München 70

Type Ventilknecht K2000

Order No. 221 00 100

Hunger

D-8000 München 70

Type VDS 1A

Order No. 236 03 308

Hunger

D-8000 München 70

Order No. 217 93 601

Cylinder Head Clamping Devie

Valve Seat Turning Tool

Test Sat for Valves

1B3-134 OM600 ENGINE MECHANICAL

Machining Procedure

Valve machining is required :

- When the valve is leaking.

- When replacing the valve.

- When replacing the valve guide.

- When replacing the valve seat or valve seat ring.

1. Machine the valve seat (a=45°).

2. Measure valve seat width ‘b’.

Valve seat

width ‘b’

1.2 - 1.7 mm

1.5 - 2.0 mm

Intake

Exhaust

3. If the specification is exceeded, the valve seat width has to

be corrected at the lower free angle of ‘

b

’=65°.

4. Measure radial runout.

Runout

Max. 0.03mm