How to Flush a Heater Core (safely)

[dogfish246]

Hey guys,

It is that time of year again when we need heat in our trucks so here is how to flush out your heater core using a hose in a safe manner to reduce any chance of damaging your heater core.

I got a 25F increase in heater temperature which is awesome!

Let me know what you think!

https://www.youtube.com/watch?v=LD2LGkUycQg

 

[Mooseman]

As usual, a great video. Even though I don't have problems with mine, I should flush it. Up here, it can make a huge difference!

 

[dmanns67]

Awesome video. I know my when my heat is on, I usually have the sunroof up to circulate the airflow because it blows very hot air.

 

[IllogicTC]

Awesome video. I know my when my heat is on, I usually have the sunroof up to circulate the airflow because it blows very hot air.

That's what the Auto HVAC is supposed to be for

 

[dmanns67]

That's what the Auto HVAC is supposed to be for

You must not be married.

 

[linneje]

I haven't done this on my Envoy, but plan to in a couple of weeks. Do you need a special tool to get the hoses off (i.e. is it a quick connect to get the hose off at the firewall)? I don't need to do the back lines, just the front ones for the Ext model.

 

[IllogicTC]

You must not be married.

Big negative, sir. Not allowed to touch the controls, or something?

 

[BlazingTrails]

dave

 

[dogfish246]

I haven't done this on my Envoy, but plan to in a couple of weeks. Do you need a special tool to get the hoses off (i.e. is it a quick connect to get the hose off at the firewall)? I don't need to do the back lines, just the front ones for the Ext model.

I do not think you need any special tools to disconnect the heater core hoses from the firewall. Just be gentle so you dont twist or crush the nipples the hoses attach to!

 

[linneje]

Just be gentle so you dont twist or crush the nipples

Are you nagging? I seem to get those instructions at home too....

 

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