Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMITSUBISHI2004ECLIPSE L4-2.4L SOHCREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGHEATER CORESERVICE AND REPAIR
2004 Mitsubishi Eclipse L4-2.4L SOHC
Heater Core: Service and Repair
2004 Mitsubishi Eclipse L4-2.4L SOHCSECTION Service and Repair
HEATER UNIT, HEATER CORE, BLOWER ASSEMBLY AND EVAPORATOR UNIT
REMOVAL SERVICE POINT
<> A/C PIPE REMOVAL
CAUTION: Seal the pipes completely, otherwise the compressor oil and receiver will absorb water vapor easily, possibly damaging the compressor and deteriorating performance.
Plug the disconnected pipe and the evaporator nipple to prevent foreign material from getting into them.
INSTALLATION SERVICE POINT
>>A<< HEATER CORE INSTALLATION
After replacing the heater core, check that the water shut valve is at "OPEN" position when refilling engine coolant.
>>B<< EVAPORATOR INSTALLATION
When replacing the evaporator, refill with a specified amount of compressor oil and install it.
Compressor oil: SUN PAG 56
Quantity: 60 cu.cm (2.0 floz)
Heater Unit, Heater Core, Blower Assembly And Evaporator Unit Part 1:
Heater Unit, Heater Core, Blower Assembly And Evaporator Unit Part 2:
REMOVAL SERVICE POINT
<> A/C PIPE REMOVAL
CAUTION: Seal the pipes completely, otherwise the compressor oil and receiver will absorb water vapor easily, possibly damaging the compressor and deteriorating performance.
Plug the disconnected pipe and the evaporator nipple to prevent foreign material from getting into them.
INSTALLATION SERVICE POINT
>>A<< HEATER CORE INSTALLATION
After replacing the heater core, check that the water shut valve is at "OPEN" position when refilling engine coolant.
>>B<< EVAPORATOR INSTALLATION
When replacing the evaporator, refill with a specified amount of compressor oil and install it.
Compressor oil: SUN PAG 56
Quantity: 60 cu.cm (2.0 floz)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.