How do I get the heater core out?

1998 NISSAN SENTRA

228,768 MILES • 1.6L • 4 CYL • 2WD • AUTOMATIC

AZDANNO04

MEMBER
348 POSTS

I found pieces of the inlet pipe. Went under dash passenger side. Removed the glove compartment. Removed the first big black box from the A/C lines. saw the cable from the climate switch cable. Looks like I have to disconnect that as well in order to this black casing out.

Dec 20, 2020 at 1:38 AM

ASEMASTER6371

✓ASE Certified Mechanic
52,796 POSTS

Good morning,

I attached pictures and procedure for the replacement for you.

https://www.2carpros.com/articles/replace-heater-core

It is a tight fit to get the box back enough to release the lines.

Roy

REMOVAL
1. Drain cooling system.
2. Discharge the A/C system. Refer to "DISCHARGING REFRIGERANT".
3. Disconnect the heater hoses from the engine compartment.
4. Remove the instrument panel.

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5. Remove the instrument panel reinforcement.
6. Remove the cooling unit..

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7. Remove the heater unit.
8. Remove the heater core.

INSTALLATION
Installation is the reverse of removal. Inspect cooling system for leaks.
Inspect A/C system for refrigerant leaks.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Dec 20, 2020 at 5:23 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.