Weird water noise

[Deadpool25]

Ok so when im at a stop and i take off i here water running in the firewall or somewhere near there has anybody come across this and what is it?

 

[007jimmy]

Its coolant flowing through your heater core.

 

[ktime]

your probably low on coolant

 

[jones1989]

Could also have a stopped up drain tube for the evaporator.

 

[Deadpool25]

I might be low coolant and where is the drain tube located?

 

[buddy3824]

you may have a leaking heater core or clogged evap that. now you will have water/coolant sitting in the bottom of your evaporator box, when you are coming to a stop or taking off, you may be hearing water sloshing around. are you low on coolant or can you smell funk in your a/c ducts?

 

[M4s73r]

What are your coolant temps at. If your low on coolant or your thermo is stuck you could hear the water boiling.

 

[Deadpool25]

you may have a leaking heater core or clogged evap that. now you will have water/coolant sitting in the bottom of your evaporator box, when you are coming to a stop or taking off, you may be hearing water sloshing around. are you low on coolant or can you smell funk in your a/c ducts?

Im hearing water sloshing around for sure im not overheating or nothing and no smell at all

 

[buddy3824]

the only other way to figure out what is going on would be to maybe drill a whole in the bottom of your evap box, but that doesnt necessarily fix your problem. it may allow the water to drain out, but the issue is that the water getting there in the first place. you dont want to have water draining into your floor board. with your climate in AZ, its dry heat right? you may not get a smell for a long time because of the low humidity. best thing to do would be pull the dash and see what exactly is going on.
could be slow leaking heater core, could be a cracked drain hose or evaporator core. does your a/c function properly?

 

[Deadpool25]

the only other way to figure out what is going on would be to maybe drill a whole in the bottom of your evap box, but that doesnt necessarily fix your problem. it may allow the water to drain out, but the issue is that the water getting there in the first place. you dont want to have water draining into your floor board. with your climate in AZ, its dry heat right? you may not get a smell for a long time because of the low humidity. best thing to do would be pull the dash and see what exactly is going on.
could be slow leaking heater core, could be a cracked drain hose or evaporator core. does your a/c function properly?

Yea it works like new I noticed that my resevoir is empty still cant check if im low cause hot radiator cap

 

[JDT]

I've been hearing the same sound. Around 3.5-4.5k RPM it sounds like water behind the dash. Never did figure out why, it doesn't seem to affect the car but it bugs the crap out of me.

 

[Deadpool25]

I've been hearing the same sound. Around 3.5-4.5k RPM it sounds like water behind the dash. Never did figure out why, it doesn't seem to affect the car but it bugs the crap out of me.

Same here im going to check it out tomorrow

So filled it up with coolant and i noticed my temp needle went up for a few seconds and went back to normal and stayed that way is that normal?

 

[buddy3824]

couldve had an air pocket. how low were you? a few capfulls? or like a liter?

 

[007jimmy]

After you refill coolant, the system needs to be burped in order to get out the remaining air pockects.

 

[NeMiZiS]

Every 420A I've owned has that same sound.
I wouldn't worry about it.
Back when I had my first 420A it was a 99, only had 20,000 miles and it did the same thing.

 

[isantop]

I had the exact same issue on my 420A. Now I know I'm not crazy.

Turned out to be an air bubble in the cooling system. Park the car facing slightly downhill (so that the radiator cap is the highest point in the cooling system), then let the car cool off COMPLETELY! (Seriously, don't skimp it out or wait. Let it cool off the whole way. Three hours, minimum.)

When you go to take the radiator cap off, press your hand against it first. If you can't hold it there, it's still way too hot. It should be mostly cool to the touch.

Once it is, remove the cap. I used to give the bumper a few presses downwards to dislodge any air bubbles, then top is off all the way.

Now, place the cap on loosely, and start the car. Go back over, and work fast. Pull the cap back off. Rev it gently on the throttle body, then top it off again. Keep doing this until the level doesn't drain at all anymore. Put the cap back on all the way, and you should be fine.

 

[jones1989]

The drain tube is near the passenger fender on the bottom of the engine bay. Should be a black tube just squeeze it, or put a pick in it to check if it is. But if your low on coolant that's the more likely cause.

 

[Deadpool25]

Well i filled it and I dont hear it anymore but my needle does the same i might have a air pocket like you said but i cant burp it cause that air release thing is stripped(Previous dumb owner BTW)...

 

[RallyEclipse98]

I had the exact same issue on my 420A. Now I know I'm not crazy.

Man that made me Laugh Out Loud! I have heard the same thing in my previous 420a as well!

OP- This is what I'm about to do with my car: [ame=http://www.youtube.com/watch?v=i36pDzhFkBQ]Prestone Flush & Fill How To - YouTube[/ame]

This should explain each step.

 

[mcrae_06]

This happened to me several times with my old dsm. If the system gets a cup or two low it will suck in air; the air bubbles will circulate through the cooling system (and into the heater core in the dash) and cause the slurping noise. Something to note: if you have bubbles in your cooling system it is likely that you have a small leak somewhere. When your car gets up to operating temp, excess coolant is released into the overflow container (assuming the n/t's have these also), and when it cools down, the coolant is sucked back into the engine; if there is a hole in one of the coolant lines, or the overflow reservoir line is disconnected/cracked, it allows coolant to leak out while you're driving at operating temp and air to be sucked in when it cools.
-hope this helps you find the underlying problem