Specifications

Flushing and Cleaning Specifications for Engine Coolant Systems 97

8 Flushing and Cleaning Specifications for Engine

Coolant Systems

General information

These cleaning specifications are f or the engine cooling systems in MTU diesel engines

In the course of time, sludge deposits from aging coolant additives can accumulate in the cooling system. Reduced

cooling capacity, clogged vent lines and drain points and dirty coolant level sight-glasses can result.

Below-standard water quality or incorrect coolant preparation can also heavily contaminate the system.

If such conditions occur, the coolant system is to be flushed out with fresh water, repeatedly if necessary.

If these flushing sequences are insufficient or if the system is too heavily contaminated, the

system and all affected parts must be cleaned.

Only clean, fresh water (no river or sea water) must be used for flushing.

Only MTU-approved or corresponding products at the specified concentrations may be used for

cleaning. The specified cleaning procedure is to be complied with.

Immediately after flushing or cleaning, fill the cooling systems with treated engine coolant as stipulated

in the current MTU Fluids and Lubricants Specifications A001061 ( → Page 37).

Fluids a

nd lubricants (e.g. treated engine coolant), used flushing water, cleaning agents and cleaning solutions can be

hazardous materials. Certain regulations must be obeyed when handling, storing and disposing of these substances.

These regulations are contained in the manufacturer’s instructions, legal requirements and technical guidelines

valid in the individual countries. Considerable differences can apply from country to country so that no generally

valid statement on the applicable regulations for fluids and lubricants etc. can be made in this publication.

Users of the products named in these specifications are therefore obliged to inform themselves of

the locally valid regulations. MTU accepts no responsibility whatsoever for improper or illegal use

of the fluids and lubricants / cleaning agents which it has approved.

Scrap oil heat exchangers from engines with bearing or piston seizures or friction damage!

Test equipment, auxiliary materials and fluids and lubricants

MTU test kit or electric pH-value measuring instrument

•Freshwater

• Prepared engine coolant

• Superheated steam

• Compressed air

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