Car overheating. I’ve tried everything I know how to do but it’s still overheati

[Matt]

2007 Chevy Equinox
3.4L V6
2WD
200k miles

Symptoms:

• Car overheats when stopped/idling
• Dual radiator fans work and do turn on automatically.
• Heater blows cold air when idling

.
Things i’ve tried:

• Replaced Thermostat
• Replaced water pump
• flushed cooling system
• bled air out of cooling system
• pressure tested to 15psi, stayed at pressure for 5 minutes.

Any ideas on what could be causing it? Thanks!

Topic

[Richard Kirshy]

2007 Chevy Equinox
3.4L V6
2WD
200k miles

Symptoms:

Car overheats when stopped/idling
Dual radiator fans work and do turn on automatically.
[color=red] Heater blows cold air when idling
[/color]
.
Things i’ve tried:

Replaced Thermostat
Replaced water pump
flushed cooling system
bled air out of cooling system
pressure tested to 15psi, stayed at pressure for 5 minutes.

Any ideas on what could be causing it? Thanks!

If your getting cold air with the heat on you either have a blockage or air entrapment.
First see if the heater core is blocked by flushing it out.

Then bleed the cooling system:

If it is a troublesome system you may need to vacuum fill the system:

[Matt]

Thanks for your response. The heater core being blocked won’t cause the engine to overheat though will it?

[Richard Kirshy]

If there is a blockage in the heater core, it could be there is a blockage with in the radiator also.
The two share the same basic design.

[Author]

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