When should I replace a school bus radiator instead of repairing it?

Replace when: the core has multiple leak points or widespread internal corrosion, a repaired radiator has failed again within the same season, the bus is showing repeated overheating after a repair, or the core is physically damaged from impact or freeze damage. A single small leak at a fitting or seam is repairable. A core with systemic failure needs replacement.

What causes school bus radiators to fail?

Coolant contamination, electrolytic corrosion, freeze damage from improper coolant mixture, and physical damage from road debris or impact are the primary failure causes. Coolant that is not changed on schedule becomes acidic and corrodes the core from inside. Electrolytic corrosion occurs when the cooling system is not properly grounded.

School Bus Radiator Replacement: When Repair Is Not Enough

Apr 19

3 min read

Updated: Sep 11

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