Coolant Pressure Cap; Cooling Water - Daewoo DE12T Manual

2.7.1. Coolant pressure cap

•
Check the pressure valve opening
pressure using a expansion tank cap
tester.
•
Replace the filler cap assembly if the
measured valve does not reach the
specified limit. (pressure valve opening
pressure : 0.9 kg/cm
Caution :
Because it is dangerous to open the
pressure cap quickly when coolant is
hot, after lowering the inside pressure
of the tank by slow-opening at first
open it fully.

2.7.2. Cooling water

•
Regarding the cooling water that is to be used for engine, the soft water not the hard water
must be used.he use of proper tools and special tools where specified is important to effi-
cient and reliable service operation.
•
The engine cooling water can be used diluting it with antifreezing solution 40% and the addi-
tive for rust prevention (DCA4) 3 ~ 5 %.
•
The density of above solution and additive must be inspected every 500 hours to maintain it
properly.
NOTE :
The proper density control of antifreezing solution and rust preventing additive will be
able to prevent the rusting effectively and maintain the stable quality of engine. For the
improper control might give the fatal damage to the cooling water pump and cylinder
liners, detail care is needed.
•
Since DE12T, DE12TI, DE12TIA and DE12TIS (diesel engine of DE12 series) cylinder liner
is dry type, particularly the cooling water control should be applied thoroughly.
•
The density of antifreezing solution and additive for rust prevention is able to be confirmed
by the cooling water test kit (Fleetguard CC2602M) or DAEWOO No. : 60.99901-0038
•
How to use the cooling water test kit
(1) When the cooling water temp. of engine is in the range of 10 ~ 55
cooling water discharge and fill the plastic cup about a half.
2 )
- 25 -
Radiator Cap
Radiator
EA5O3002
˚C
, loosen the plug for
TECHNICAL INFORMATION