Daewoo MUSSO Service Manual page 430

1B3-126 OM600 ENGINE MECHANICAL
15. Hang the cylinder head (1) to the lifting device and heat in
a water tank to approx. 80°C.
16. Cool down new valve seat ring (2) into the cooling box with
liquid nitrogen.
Notice
Do not touch the cooled valve seat rings with hand.
17. Drive in new valve seat ring (2) with a proper wooden drift.
18. Install the valve guide (3) with a proper drift and assembling
tool.
Notice
The valve guide must be driven in from the cylinder head
cover.
19. Machine the valve seats.
Super Cooling Box 345 589 00 63 00
Drift (Intake) 8mm
Drift (Exhaust) 9mm