Daewoo CIELO EURO III Manual page 118

1D – 10 ENGINE COOLING
Dual Overhead Cam Engine
Removal Procedure
Caution: To prevent personal injury, do not remove
the surge tank cap while the engine and the radiator
are still hot because the heat causes the system to
remain under pressure. Scalding fluid and steam
may be blown out under pressure.
1. Drain the coolant. Refer to "Draining and Refilling
the Cooling System" in this section.
2. Loosen the hose clamp on the upper radiator hose
at the thermostat housing.
3. Disconnect the upper radiator hose from the ther-
mostat housing.
4. Loosen the clamp on the bypass hose.
5. Disconnect the bypass hose from the thermostat
adapter.
A102D003
6. Remove the mounting bolts that hold the thermostat
housing to the cylinder head.
7. Remove the thermostat housing from the head.
8. Remove the O-ring seal from the head.
9. Check the valve seat for foreign matter that could
prevent the valve from seating properly.
10. Check the thermostat for proper operation. Refer to
"Thermostat Test" in this section.
11. Clean the thermostat housing and cylinder head
mating surfaces.
E21D004
Installation Procedure
1. Coat the sealing surface of a new O-ring seal with Lu-
briplate .
2. Install a new O-ring seal into the recess in the cylinder
head.
3. Secure the thermostat housing to the cylinder head
with the mounting bolts.
Tighten
Tighten the thermostat housing mounting bolts to 20
N m (15 lb-ft).
E21D004
DAEWOO T-154 BL2,3