Coolant; Water To Be Used; Table 6-1 Water Quality Standard - Mitsubishi S16R Series Operation & Maintenance Manual

6

COOLANT

This chapter describes coolant to be used. In this manual, the word "coolant" represents a mixture of water and
LLC.

Water to Be Used

When you add water to coolant, use only the water that meets the water quality standard
specified in this Operation & Maintenance Manual.
* Otherwise, premature corrosion or overheating in the engine parts may occur.
Use soft water which meets the requirements specified in the table below. If tap water meets the requirements,
the tap water can be used.
pH Electrical
(25°C conductivity
[77°F]) (mS/m)
Recom- 6.5 to 8.0 ≤ 25
mend
value
Limit value 6.5 to 8.5 ≤40
Main harm Corrosion Corrosion
Scale Scale
formation formation
• In addition to the items specified above, turbidity must be below 15 mg/liter.
• Basically, the water quality must be within the range of the recommended values, however,
up to the limit value is acceptable.
Mitsubishi Diesel Engine S16R & S16R2 OPERATION & MAINTENANCE MANUAL
Pub. No. K29001-00320 Revision: 1

Table 6-1 Water Quality Standard

Total hard- M Chlorine
ness alkalinity ion
≤95 ≤70 ≤100
≤100 ≤150 ≤100
Scale Scale Corrosion
formation formation
Sulphate Total
Silica
ion iron
mg/l
≤50 ≤1.0 -
≤100 ≤1.0 ≤50
Corrosion Scale Scale
formation formation
6 COOLANT
Residue by
evaporation
≤250
≤400
Scale
formation
111