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Old 11-06-2009, 07:22 PM   #1
01SuperCoupe
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Dizzy Liquid sloshing inside, or under the dash?!

Strangest thing happened this morning: My wife & I went for a ride in my SC2 after it rained overnight. When making turns or stopping we can hear some sort of liquid sloshing around inside, or under the passenger's side dash area.
I know I need to look after the drain hoses for my sunroof as I have had wet carpet before, but now the carpet is dry and I can hear liquid moving around there, somewhere. Anybody had this happen to them? If so, how would you drain this liquid and prevent it from accumulating again?

Note: I suspected maybe the heater core might be leaking into the housing, but there is no coolant smell at any time and the heater is warm and works fine. The coolant level in the plastic reservoir is also holding steady.

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Old 11-06-2009, 08:37 PM   #2
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Default Re: Liquid sloshing inside, or under the dash?!

you have an air bubble in the heater core. Park the car with the nose higher up in the air and it will leave eventually. Check that he reservoir if at the proper cold level, about 1/4" above the weir in the tank.

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Old 11-06-2009, 09:13 PM   #3
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Default Re: Liquid sloshing inside, or under the dash?!

Should I loosen/remove the cap on the reservoir and run the engine with the heater on high to expel the air bubble, or will gravity alone do the job?

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Old 11-06-2009, 11:07 PM   #4
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Default Re: Liquid sloshing inside, or under the dash?!

There is always coolant flow through the core. The water enters the bottom and exits the top. If you park nose up that usually gets rid of it eventually. There is no actual approved removal method. The detailed explanation of the system is below.

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Old 11-06-2009, 11:25 PM   #5
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Default Re: Liquid sloshing inside, or under the dash?!

since this was after a rain storm, might i suggest the possiblty that rain water has collected in the HVAC case(simular to a leaking heater core, but with out the smell). if this is the case, regardless of if it is rain water or coolant, the liquid would only remain stuck in the case if the drain was clogged. see the photo below for the location of the drain on the firewall. in the picture a pencil eraser is being inserted to the drain, this is the recommended clean procedure. the eraser tip is the perfict size and soft as to not cause and damage.



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Old 11-06-2009, 11:46 PM   #6
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Default Re: Liquid sloshing inside, or under the dash?!

+1^^^ Thats worth a shot also.

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Old 11-07-2009, 10:44 AM   #7
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Default Re: Liquid sloshing inside, or under the dash?!

If after you clean the drain to the HVAC module you find blockage in the drain and water in the module you need to find out why the cowl drains are not doing there job.They are there to prevent just this thing from happening.


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Old 11-07-2009, 05:49 PM   #8
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Default Re: Liquid sloshing inside, or under the dash?!

Thank you, gentlemen. I will have a look at this tomorrow when the sun returns...Am I alone in hating the fall time change?

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Old 11-10-2009, 10:13 AM   #9
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Default Re: Liquid sloshing inside, or under the dash?!

I was thinking about posting on this exact symptom. I will be following closely to see of the outcome is the same.

Hear the water sloshing when i was going around the corner and up the hill to our house. Heard it twice, but it is not all the time.

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Old 11-10-2009, 10:40 AM   #10
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Default Re: Liquid sloshing inside, or under the dash?!

I've heard the heater core passing a bubble a few times in the life of my SC1, I find it amusing!
The other suggestions are very good as well, and I'll add to check the little mesh dam on the passenger side cowl. Open the hood and on the right side of the cowl you will see an oval mesh with two foam gaskets around it. Make sure these are still glued together and to the cowl. a bit of silicone works fine.
Richpin posted a picture of his awhile ago, it had a small problem, there were fingers in it!

edit: found it,

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Last edited by mattelderca; 11-10-2009 at 10:51 AM..

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Old 11-10-2009, 11:04 AM   #11
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Default Re: Liquid sloshing inside, or under the dash?!

Quote:
Originally Posted by mattelderca View Post
I've heard the heater core passing a bubble a few times in the life of my SC1, I find it amusing!
The other suggestions are very good as well, and I'll add to check the little mesh dam on the passenger side cowl. Open the hood and on the right side of the cowl you will see an oval mesh with two foam gaskets around it. Make sure these are still glued together and to the cowl. a bit of silicone works fine.
Richpin posted a picture of his awhile ago, it had a small problem, there were fingers in it!

edit: found it,
The screen is also there to prevent little bits of mother nature (leaves, seeds, pine needles, Maple tree helicopters etc.. from falling done in there and making their way into the HVAC blower housing and or its drains...If it has gone missing, one can be easily fabricated using some 1/2 in foam door insulation and a bit of window screening from any hardware store.

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Old 10-25-2013, 06:36 PM   #12
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Default Re: Liquid sloshing inside, or under the dash?!

where is this a/c drain plug that i can stick a pen into? , i cant seem to find it. parking my car elevated nose up doesnt seem to be working

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Old 10-25-2013, 06:53 PM   #13
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Default Re: Liquid sloshing inside, or under the dash?!

On the firewall under the intake manifold/plenum.

http://www.youtube.com/watch?v=W0VdF...9FD3A&index=51

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