Skip the auto shop - Our mechanics make house calls

Q: Removing heater core

asked by on

I have everything taken out and I'm stuck on removing the heater core so I can remove the blend door. There is a metallic unit on the driver's side with 2 tubes running through the firewall into the engine compartment. Do I have to disconnect this to remove the full heater core?

My car has 151000 miles.
My car has an automatic transmission.

A: Hello. If I understand the situation correc...

Hello. If I understand the situation correctly, you are talking about the metal tubes that run from the inside of the vehicle, through the firewall, which are the supply and return lines for the coolant to the heater core.

If this is correct, then yes, you will have to remove the connections in the engine compartment, to allow the HVAC unit (with the heater core inside of it) to be pulled out from under the dashboard. Just remember, it would be best to drain some of the coolant from the radiator before removing the connections, as coolant will be lost and can drain into the interior of the vehicle.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Jeep liberty heat not working and fluid on ground

It sounds like you may have a leaking heater core. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a unit that circulates the hot coolant from the engine through the heater core. This warm coolant is used to heat the inside of the car...

Q: Automatic won't shift

It sounds like your shifter cable may have come loose. What happens over time the bushing for the the shifter cable that connects to the linkage on the transmission becomes worn and needs replacing because it will not stay connected....

Q: How do I mute a phone call with the voice recognition system?

At any point during a phone call, you can mute the conversation. During this time, you will continue to hear the person you are speaking to, but they cannot hear you. To mute, press the voice command button and say...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.