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Old 01-01-2019, 06:02 PM   #1
den812
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2004 VUE 3.0L
2005 VUE 2.2L
Wrench 3.0 l61 heater problem

For the first: HAPPY NEW 2019 YEAR 4 ALL THERE !!!

My problem is insufficient heating of the cabin Vue 3.0 2003

what can I do and check HVAC ?

1. termostat is ok ( changed )
2. engine temperature is ok
3. colling fluid changed and level is ok
but:
the hot heater core intake pipe only lightly warm
and out from core is cold ...

only light warn at 1 speed in cabin
(have auxilary pump in this flow L61)



TNX
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Old 01-01-2019, 09:08 PM   #2
KCW
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2004 VUE 2.2L
Default Re: 3.0 l61 heater problem

I dont know if there is a valve that shuts off the coolant to the heater core, or if the heater controls the heat to the cabin by blocking off the air from the core into the passenger compartment.

It sounds like no coolant is flowing thru the heater core. If the water pump had failed your engine would be overheating .

Its possible you have an air bubble in the heater core and its enough resistance that the coolant follows the bypass path to the radiator, or something is blocking the flow thru the heater core: collapsed or kinked hose? Sludge in the core tube?

I know its possibly for a brake hose to be collapsed on the inside and look normal on the outside. Maybe that can happen with the relative small hoses going to the heater core too.

If there is an aux pump on the coolant only to the cabin heater, that sounds likely to be the failure.
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Old 01-01-2019, 10:45 PM   #3
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Default Re: 3.0 l61 heater problem

No manual shut off valve in heaters. One less item to fail. 100% coolant flow all the time.

den812, L61 designates 2.2L 4cy engines. L81 designates 3.0L V6 engines. If you have the auxiliary (12v) coolant pump, it may be dead and blocking coolant flow into the heater. If dead, remove it and splice the hoses together or replace with a new hose. Disconnect wiring and tie it back to harness out of the way.
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Old 01-02-2019, 05:37 AM   #4
den812
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2004 VUE 3.0L
2005 VUE 2.2L
Wrench Re: 3.0 l61 heater problem

I think about boules inside the heater core or about dead auxiliary pump
because VUE 02-05 had not other switches and blockers inside flow to the heater core ...

tomorrow I try to check this pump and harness then air boules by disconest out tube rom core
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Old 01-02-2019, 09:37 PM   #5
KCW
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Default Re: 3.0 l61 heater problem

I did not know any Vue's had an electrical pump on the heater core coolant.

by the way, I visited St Petersburg several years ago, had a great time, wonderful city.

Let us know what you find on your Vue.
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Old 01-04-2019, 04:41 PM   #6
den812
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2005 VUE 2.2L
Sad Re: 3.0 l61 heater problem

Quote:
Originally Posted by KCW View Post
I did not know any Vue's had an electrical pump on the heater core coolant.

by the way, I visited St Petersburg several years ago, had a great time, wonderful city.

Let us know what you find on your Vue.
My heater core is got clogged ... (((
will try to clean it

but also anyone know logic of on/off this auxilary pump? ( 3.0)
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Old 01-04-2019, 06:16 PM   #7
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2007 VUE 3.5L
Default Re: 3.0 l61 heater problem

Quote:
Originally Posted by den812 View Post
but also anyone know logic of on/off this auxilary pump? ( 3.0)
See this thread ...

http://www.saturnfans.com/forums/sho...d.php?t=201756
...
I visit forum monthly, if at all. Feel free to send private messages if you think I can help. Don't use visitor message as I never check those.
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Old 03-31-2019, 07:22 AM   #8
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2004 VUE 3.0L
2005 VUE 2.2L
Thumbs Up Re: 3.0 l61 heater problem

Thank you there !

flushing my coolling system 2 times finally resolved my issue
but only when second time drive locally on flushing liquid in system 2 days !!

I have found cool russian product for this









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