Caterpillar C15 Heat Exchanger Parts, Problems & Replacement
September 6, 2026
- Caterpillar C15 Marine Heat Exchanger: Part Numbers, Problems & Replacement
- Caterpillar C15 Marine Engine Parts
- Caterpillar Marine Engine Parts & Rebuild Kits
- Request a Quote
- request@alfamarinespareparts.com
- Caterpillar C15 Heat Exchanger Part Numbers
- Caterpillar 266-9513 / 2669513 Heat Exchanger End Plate
- 266-9513 / 2669513
- Caterpillar 266-9514 / 2669514 Heat Exchanger Channel Plate
- 266-9514 / 2669514
- Caterpillar 266-9515 / 2669515 Heat Exchanger Channel Plate
- 266-9515 / 2669515
- “Do We Need the Whole Heat Exchanger or Just the Plates?”
- What Does the C15 Heat Exchanger Actually Do?
- Heat Exchanger or Aftercooler?
- Follow the Cooling Circuit Before Blaming the Heat Exchanger
- “The C15 Is Fine at Idle but Overheats Under Load”
- Check the Seawater Flow First
- Real Situation: The New Heat Exchanger Doesn't Fix the Problem
- Don't Forget the Thermostat
- A C15 Can Have Coolant Flow and Still Overheat
- What If the Impeller Has Missing Pieces?
- What Can Block a C15 Heat Exchanger?
- Warm Seawater Can Expose a Marginal Cooling System
- Can Scale Inside the Heat Exchanger Cause Overheating?
- Don't Ignore Air in the Cooling System
- Can the Heat Exchanger Leak Internally?
- Look Before You Clean
- Clean It or Replace Parts?
- Don't Forget the Seals
- Check the Zinc Protection While You're There
- “Can We Just Replace the Bad Plate?”
- Why the Engine Serial Number Still Matters
- Request 1
- Request 2
- What If the Part Number Is Unreadable?
- Caterpillar C15 Heat Exchanger Part Number Summary
- Caterpillar C15 Heat Exchanger FAQs
- What is the Caterpillar C15 heat exchanger part number?
- What is Caterpillar 266-9513?
- What is Caterpillar 266-9514?
- What is Caterpillar 266-9515?
- Is 2669514 the same as 266-9514?
- Can a blocked C15 heat exchanger cause overheating under load?
- Can a weak seawater pump look like a heat exchanger problem?
- Can broken impeller pieces block the heat exchanger?
- Can I clean the C15 heat exchanger instead of replacing it?
- Should I replace seals when the exchanger is opened?
- What information should I send when ordering C15 heat exchanger parts?
- Request Caterpillar C15 Heat Exchanger Parts
- Caterpillar C15 Marine Overheating Under Load
