Heater core hose diagram needed?

2012 CHEVROLET SONIC

50,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC

CORY2427

MEMBER
293 POSTS

I replaced thermostat housing and can’t remember which hose on heater core goes where on housing.

Aug 18, 2024 at 11:50 AM

JACOBANDNICKOLAS

✓ASE Certified Mechanic
110,194 POSTS

Hi,

They don't make a schematic, so I had to. LOL There are two hoses. One is a supply (inlet) and the other is a return (outlet).

If you look below, the first two pics are for the outlet. Pics 3 and 4 show the inlet.

Let me know if this helps.

Joe

See pics below.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Aug 18, 2024 at 8:59 PM

CORY2427

MEMBER
293 POSTS

So, the bottom port of the heater core goes to the top of thermostat port and the top of heater core port goes to bottom of the thermostat port.

Aug 19, 2024 at 5:36 AM

JACOBANDNICKOLAS

✓ASE Certified Mechanic
110,194 POSTS

Hi,

Based on what I'm seeing in the manual, you are correct.

Let me know how things work out for you or if you have other questions.

Take care,

Joe

Aug 19, 2024 at 7:14 PM