Caterpillar C15 Marine Aftercooler Part Numbers & Problems
September 5, 2026
- Caterpillar C15 Marine Aftercooler: Part Numbers, Old Numbers & Replacement
- 315-0047 / 3150047 Caterpillar Aftercooler Core
- 266-0053 / 2660053 Caterpillar Aftercooler Core
- Caterpillar C15 Marine Engine Parts
- Caterpillar Marine Engine Parts & Rebuild Kits
- Request a Quote
- request@alfamarinespareparts.com
- Caterpillar C15 Aftercooler Part Numbers
- 315-0047 / 3150047 Aftercooler Core
- 266-0053 / 2660053 Aftercooler Core
- Why 315-0047 / 3150047 Matters
- 315-0047 / 3150047
- Caterpillar 315-0047 / 3150047 Aftercooler Core
- Which Engines Use 315-0047 / 3150047?
- What About 266-0053 / 2660053?
- 266-0053 / 2660053
- Caterpillar 266-0053 / 2660053 Aftercooler Core
- What About 172-9364 / 1729364?
- Why Old Numbers Matter
- What Else Might Be Needed With the Core?
- Real Situation: The New Core Is Onboard, but the Job Still Stops
- 1 × 315-0047 / 3150047 Aftercooler Core
- “I Have a C15. Isn't That Enough?”
- Is the Aftercooler the Same as the Heat Exchanger?
- “The Engine Runs Fine at Idle but Feels Weak at Sea”
- Can a Dirty Aftercooler Increase Charge-Air Temperature?
- Don't Replace the Cooler Before Checking Water Flow
- Check the Wider Cooling System Too
- Caterpillar C15 Marine Overheating Under Load
- What If the Impeller Is Missing Pieces?
- Can an Aftercooler Problem Cause Black Smoke?
- Don't Forget the Turbocharger
- What If You Find Oil Inside the Aftercooler?
- Clean It or Replace It?
- Look at the Old Cooler Before Cleaning It
- Core or Complete Aftercooler?
- Can I Use a C18 Aftercooler on a C15?
- What If the Old Number Is Hard to Read?
- Caterpillar Aftercooler Part Number Summary
- Current Product
- Older Product Reference
- Older / Historical Reference
- Caterpillar C15 Aftercooler FAQs
- What is the Caterpillar C15 aftercooler part number?
- Is 3150047 the same as 315-0047?
- What is 266-0053 / 2660053?
- What is 172-9364 / 1729364?
- Which marine engines use 315-0047 / 3150047?
- Is 315-0047 a complete aftercooler?
- Can a dirty aftercooler cause power loss?
- Can a bad aftercooler cause black smoke?
- Can I order using only the engine model?
- Request Caterpillar C15 Aftercooler Parts
- Request a Quote