Isuzu AU-4LE1T, Руководство по обслуживанию

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6. OPERATION AND CARE FOR NEW
ENGINE
Your ISUZU engine is carefully tested and adjusted in the factory, however,
further, thorough run-in (i.e. break-in) operation is necessary.
If the new engine is harshly operated, lubricating oil film will be reduced
leading to abnormal wear or seizure. Particularly, avoid a harsh engine
operation within the initial 100 operation hours observing the following
notice.
1) Do the warming-up operation continuously until the engine is
warmed-up. In this operation, do not race the engine.
2) Also do not operate the engine with rapid acceleration, rapid machine
starting and continuous high speed operation.
7. ENGINE CARE FOR OVER-COOLING
Engine over-cooling cause premature wear and increased fuel consumption.
When the coolant temperature is not raised to 75 to 90°C (167 to 194°F)
indefinitely, take an action to recover this with means of radiator curtain or
such like.