Maintenance Specifications
PACCAR Y53-1030A 12/09 – 71 –
Cooling System Soluble Oils
CAUTION: Do not use soluble oils in the cooling
system. The use of soluble oils in the cooling
system will cause damage to the engine. Soluble
oils in the cooling system will:
• Corrode brass and copper
• Damage heat transfer surfaces
• Damage seals and hoses.
Failure to comply may result in equipment or
property damage.
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