Service Manual

Cooling System ISB, ISBe and QSB (Common Rail [...]
Page 8-44 Section 8 - Cooling System - Group 08
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NOTE: An alternate to using sodium carbonate, as
outlined in this procedure, is to use Restore™.
Restore™ is a heavy-duty cooling system cleaner that
removes corrosion products, silica gel, and other deposits.
The performance of Restore™ is dependent on time,
temperature, and concentration levels. An extremely
scaled or flow-restricted system, for example, can require
higher concentrations of cleaners, higher temperatures,
longer cleaning time, or the use of Restore Plus™. Up to
twice the recommended concentration levels of Restore™
can be used safely. Restore Plus™ must be used only at
its recommended concentration level. Extremely scaled or
fouled systems can require more than one cleaning.
CAUTION
Do not install the radiator cap. The engine is to be
operated without the cap for this process.