What is this, and why does it drip so much?

[Friday88]

I've seen these same drips on many cars over the years and it's never seemed like something people get concerned about. It happens when the AC system is on, and the liquid coming out looks and smells like water.

It is coming out of a small nipple thing on the firewall behind the passenger side of the engine. This truck has always dripped a little from here since I've owned it, but today it just seemed excessive. I want to know what this is and if it matters? Is it just a drain for AC condensation? When I came out to the truck this morning there was still a wet spot on the driveway from where it had been dripping over night. Pictured below was at the gas station today.

 

[Morphyne]

I've seen these same drips on many cars over the years and it's never seemed like something people get concerned about. It happens when the AC system is on, and the liquid coming out looks and smells like water.

It is coming out of a small nipple thing on the firewall behind the passenger side of the engine. This truck has always dripped a little from here since I've owned it, but today it just seemed excessive. I want to know what this is and if it matters? Is it just a drain for AC condensation? When I came out to the truck this morning there was still a wet spot on the driveway from where it had been dripping over night. Pictured below was at the gas station today.

Yes it is ac condensation.

 

[Friday88]

I somehow put this on the 4th gen forum. Guess I'm not awake yet, But I suppose it doesn't matter since this drip is pretty universal to other vehicles.

 

[Bossman]

http://www.toyota-4runner.org/3rd-gen-t4rs/210509-name-tube-right.html

http://www.toyota-4runner.org/3rd-gen-t4rs/212303-ac-drain-hose-location.html

http://www.toyota-4runner.org/3rd-gen-t4rs/222079-c-condenser-drain.html

 

[easyeatlanta]

http://www.toyota-4runner.org/3rd-gen-t4rs/210509-name-tube-right.html

http://www.toyota-4runner.org/3rd-gen-t4rs/212303-ac-drain-hose-location.html

http://www.toyota-4runner.org/3rd-gen-t4rs/222079-c-condenser-drain.html

I swear you must have all the links.

 

[Friday88]

lol thanks guys. I guess I could have probably googled this.

 

[V8Man]

[MENTION=76583]Morphyne[/MENTION]
I am assuming this is the first time you have had humidity in your dry desert air! Here it will almost run a stream like a garden hose at times.:jump:

 

[Morphyne]

Wrong guy. I live in nc and see this daily.

 

[2003-4x4runner]

That's just water from the AC condenser, its normal. I get it all the time in the summer.

 

[wcjeep]

On my work truck the AC runs all. Typically I turn on the heat to defrost at blast for a few minutes at the end of the day. Allows any ice buildup to quickly leave. Can cause a decent puddle.

I prefer to park my vehicles with nose slightly down to drain any water.

 

[mjotrainbrain]

As long as this topic is being discussed...reroute your AC drain line! It's really easy, and will save you from frame rust! The only place where my frame has any notable flaking is on top of the rail right under that drain. A few feet of hose that fits over the stock drain hose plus a hose clamp and some zip ties and now it drains safely directly onto the ground, rather than over the frame then to the ground. Doesn't help that this area is right next to the cat. Frames don't like moisture or heat cycles, both of which this area of frame is exposed to.

 

[ZebRuaj]

On a side note, I just blew out a drain line last night with compressed air on a friend's vehicle. Was complaining that the passenger floorboard was soaked.

About a gallon of water came rushing out after a couple seconds of compressed air went up the tube.

 

[mjotrainbrain]

On a side note, I just blew out a drain line last night with compressed air on a friend's vehicle. Was complaining that the passenger floorboard was soaked.

About a gallon of water came rushing out after a couple seconds of compressed air went up the tube.

You just sprayed the air into the tube, or did you come from the inside somehow?

 

[Montego Murph]

On a side note, I just blew out a drain line last night with compressed air on a friend's vehicle. Was complaining that the passenger floorboard was soaked.

About a gallon of water came rushing out after a couple seconds of compressed air went up the tube.

I'm wondering if that's really a good way to do it. Is there any possibility a tough clog might disconnect the line from the nipple?

I've always used weedwacker string as a roto-rooter. Might try air though if it's not a risk. Of course then I'm just pushing the clog back up into the pool to come through again....

 

[ZebRuaj]

You just sprayed the air into the tube, or did you come from the inside somehow?

Air up the tube, dislodge whatever was gummed up, and water comes down, hopefully with whatever it was that clogged the tube.

I'm wondering if that's really a good way to do it. Is there any possibility a tough clog might disconnect the line from the nipple?

I've always used weedwacker string as a roto-rooter. Might try air though if it's not a risk. Of course then I'm just pushing the clog back up into the pool to come through again....

I have yet to have a problem with it. Just don't be shooting up 100+ PSI up the drain pipe. Use some common sense.