Daewoo Musso. Manual — part 103
OM600 ENGINE MECHANICAL 1B3-119
4. Reaming basic bore in cylinder head (repair size).
- Thoroughly remove carbon deposits in cylinder head.
Notice
Particularly remove the insides of the valve seat rings.
- Remove the elevation (arrow) of intake valve seat rings.
- Select correct broaching tool and guide sleeve (refer to
the table).
Notice
Before broaching work, the broaching tool must be cleared
of swarf with a stiff plastic brush.
- Lubricate the basic bore, guide sleeve and broaching tool
with petroleum.
- Push broaching tool (6) in broaching direction (arrow) into
the guide sleeve (7) far enough so that the first cut of the
broaching tool is positioned in the basic bore when guide
sleeve is fitted onto the valve seat ring (3).
6. Broaching tool
7. Guide sleeve
See the ‘standard data’
- Center the guide sleeve (7) in the valve seat ring (3) by
turning.
- Knock through the broaching tool (6) with a plastic hammer
(approx. 25g). and aluminum drift.
1B3-120 OM600 ENGINE MECHANICAL
8. Check the valve guide bore with GO / NO GO gauge (9).
The GO side (marked ‘0’) should just still drop. If the GO
side cannot be inserted, the bore of valve guide should be
reamed.
Notice
Perform the check only on cooled down cylinder head.
GO / NO GO Gauge (for Intake) 102 589 00 23 00
GO / NO GO Gauge (for Exhaust) 117 589 03 23 00
6. Cool down the new valve guide (2) with liquid nitrogen.
Notice
Do not touch the cooled valve guide by hand.
Super Cooling box 346 589 00 63 00
7. Drive in new valve guide with drift (8) until the wire ring makes
contact.
Notice
The valve guide must be driven in from the cylinder head
cover.
Drift (for Intake) 601 589 05 15 00
Drift (for Exhaust) 601 589 06 15 00
5. Heat the cylinder head (1) in a wear tank to approx. 80°C.
OM600 ENGINE MECHANICAL 1B3-121
9. If necessary, ream the valve guide bore evenly.
Notice
Never turn the reamer against the direction of rotation.
Reamer (for Exhaust) 000 589 10 53 00
Reamer (for Intake) 000 589 21 53 00
1B3-122 OM600 ENGINE MECHANICAL
VALVE SEAT RINGS
Preceding Work : Removal of valve
Checking of valve guide, replace if necessary
Removal of prechamber
1 Cylinder Head
2 Valve Seat Ring
3 Valve Guide
A Height (Cylinder Head Upper / Lower Surface)
B Height (cylinder Head Cover Surface - Seat of
Valve Seat Ring)
D
Valve Seat Ring Outer Diameter
D1 Valve Seat Ring Inner Diameter
D2 Basic Bore Diameter
H
Height of Valve Seat Ring
Service Data
Item
D2
D
D1
H
Overlap U=D-D2
B
A
Intake
40.000 - 40.016mm
40.084 - 40.100mm
33.400 - 33.600mm
6.955 - 7.045mm
0.068 - 0.100mm
133.4mm
142.5mm
Exhaust
37.000 - 37.016mm
37.084 - 37.100mm
30.400 - 30.600mm
6.955 - 7.045mm
0.068 - 0.100mm
133.4mm
142.5mm
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