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4. Cooling System Service

Most repairs to the cooling system are easy and require relatively little time. Always plan to replace gaskets and seals and have those on hand before beginning.


The cooling system at high temperature operates under pressure. If it is necessary to open the hot cooling system, do so very slowly to allow safe release of pressure. Use heavy gloves or other hand protection.


Avoid adding cold water to the coolant while the engine is hot or overheated. If it is absolutely necessary to add coolant to a hot system, do so only with the engine running and coolant pump turning.

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