CATEngine Parts

229-9136 A C Heater Core — Cat

This A/C heater core is a heat exchanger responsible for transferring heat from the engine coolant to the cabin air, providing heating during cold operation. Constructed with durable materials to withstand thermal cycling and pressure, it offers reliable performance unlike a corroded or leaking core which can lead to reduced heating efficiency and potential coolant loss. Observable symptoms include a lack of heat in the cabin, a sweet odor from the vents, or fogging of the windshield.

A C Heater Core – Part No 229-9136 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeA/C Heater Core
MaterialAluminum or Copper alloy
ApplicationCabin climate control system
Service LifeReplace when performance degrades or leaks are detected
CompatibilityCAT Engine 3126B, 4M40, 3064, 3066, C7, C6.4, C4.4
ConditionNew — OEM specification aftermarket

Failure Symptoms

The primary symptom of a failing heater core is a significant reduction in cabin heating capability, even with the engine at operating temperature. This can progress to a persistent fogging of the interior glass due to coolant vapor, and a noticeable sweet smell inside the cab. If left unaddressed, a leaking heater core can lead to coolant loss, engine overheating, and potential damage to electrical components.

Installation Tip

Ensure the cooling system is completely drained and depressurized before disconnecting heater hoses to prevent coolant spillage. When connecting new hoses, use appropriate clamps and ensure a secure fit to prevent leaks.

Service Note

Inspect and test the thermostat, water pump, and radiator cap when replacing the heater core.