Specifications

Coolants 13
3 Coolants
Requirements
Coolants must be prepared from suitable fresh water and an MTU-approved coolant additive.
Conditioning of the coolant takes place outside the engine.
Mixing of different coolant additives and supplementary additives is prohibited!
The MTU conditions for coolant-additive approval are specified in MTU Factory Standards
(MTL). The following standards are available:
• Emulsifiable corrosion-inhibiting oils, MTL 5047
• Corrosion-inhibiting antifreeze: MTL 5048
• Water-soluble corrosion inhibitors, MTL 5049
Coolant manufacturers are inf
ormed in writing if their product is approved by MTU.
To prevent cooling system damage:
• When topping up (following loss of coolant) it m ust be ensured that the concentration of corrosion-inhibiting
additive in the cooling system is 50% by volume (frost-protection to –37 °C).
• Do not use concentrations of corrosion-inhibiting additives exceeding 55% by volume (max. antifreeze
protection). Concentrations in excess of this reduce antifreeze protection and heat dissipation.
Coolant mixtures:
Antifreeze protection to °C
–37 approx. –45
Water % by vol.
50 45
Corrosion-inhibiting additive % by
vol.
50 Max. 55
Fresh water
Only clean, clear water with values in accordance with those in the following table must be used
for preparing the coolant. If the limit values for the water are not achieved, its hardness or mineral
content can be decreased by adding demineralized water.
Min. Max.
Total earth alkalines
1)
(Water hardness)
0mmol/l
0°d
2.7 mmol/l
15°d
pH-value at 20 °C
6.5 8.0
Chloride ions 100 mg/l
Anion total
200 mg/l
1)
Common designations for water hardness in various countries:
1mmol/l = 5.6°d = 100 mg/kg CaCO
³
• 1°d = 17.9 mg/kg CaCO
³
, USA hardness
• 1°d = 1.79° French hardness
• 1°d = 1.25° English hardness
Coolant Additives
Emulsifiable Corrosion Inhibiting Oils
A 2% by volume concentration must be used for initial filling.
A001061/33E 08-01 ©MTU
TIM ID: 0000010136 – 006