SeanR

The drain tube for the evaporator is right above the factory cats. When it drops down sometimes it will go through the hole for the O2 sensor and make a nice sound that makes you hungry for bacon.

Don't worry about it, just go buy some bacon and all is well.

depami

Just be careful cooking the bacon on the cats. You wouldn't want to start a grease fire.

Jon B.

Could be they were trying to make the puddles less visible, but I just imagine packaging. It's basically straight out of the car from the source.

I live in a pretty hot/humid area, and it usually looks like my car has relieved itself wherever it was parked. I don't have factory cats though, so I imagine a lot misses the X-pipe and cats that are on the car.

I honestly don't mind it much because my AC WILL freeze you out of the car. Stan did stellar work there. I also turn the AC off a bit before the house, so it doesn't do it in my garage.

EMan 928

Hi Charley, not coolant. I put a plastic dish underneath the car and it was water.

But you're right, that coolant tank looks like it's seen better days. Luckily the previous owner was nice and included a brand new one with the sale

EMan 928

Thanks Merlin, the funny thing is that I don't have the system on and the AC button is not pressed in to activate. And, very low humidity today here in MI, too.

SteveG

You said it was water w/o coolant but the above statement is confusing; if it is not on, there should be no condensate. Are you losing coolant, i.e., is the level in the res mysteriously low? What I would be checking is the condition of the heater valve and its two hoses. If that part of the cooling system is aged, (and leaking) it could strand you, easy to fix. Passenger side, under the air box.

EMan 928

Thanks, Steve.

No, coolant level is right at the middle seam of the expansion tank. Plus, there was no coolant in the droplets. Just clear water. So, if I pop off the airbox, would I see it leaking if there was a leak?

SteveG

Well, I would think so. The evidence is conflicting. If the res is steady, it would not point to coolant. I would get engine up to operating temp and while doing so remove the air box so as to see the fire wall and the area under there above the cats. There is a drain on pasenger side from the windshield washer cowling, covered with rubber flap, maybe 3" wide, 1" high. Windshield washer hoses inside hood are in this area too. I'm just guessing at this point for any source of water.

Have you checked the water bridge? This is a common leak point. I had what looked to be clear fluid pooling in nooks at front of engine. Bear with me, it can get to the valley and there is a drain hole at rear of valley. As I said it looked clear, but it was coolant from bridge. I replaced those seals and no leak.

depami

Since it's localized enough to catch in a dish, can you see where it is coming from?

I have actually seen a cracked block that allowed antifreeze to leak out and not water. Yes, it actually separated the two and put the af on the ground and kept the H2O in the block. But, I have never seen it the other way around.

Mrmerlin

the info your providing is quite conflicting,
if your not running the AC system and there is water dripping off the car above the cats then maybe the drain tube is plugged and the tray is filled with water and you notice it dripping when the car is stopped.
IE it fills up when the Ac is used but doesnt drain, in that case you could get up under the car and poke the drain with a wire

For sure remove the aircleaner lower housing and inspect the HCV and short hose if they are older than 5 years consider replacing them both

PHIL928

it could also be the fuel cooler, mine is always dripping from both there and the ac.

G8RB8

Doesn't the A/C compressor run when you run the defogger? Maybe that's it.

Charley B

You might check the front of the AC compressor with the controls in the position you had them, and the car running, just to make certain that the clutch is not engaged.

dprantl

This is a GTS, so the compressor is set to run even when the bottom slider is set all the way to the left (it's not an "O" on later cars, but a 3-arrow recirculation circle). That should not produce a very large volume of condensate though, unless you're driving at speed and your recirculation flap pod is not holding vacuum allowing fresh air inside.

Dan
'91 928GT S/C 475hp/460lb.ft

Charley B

Unless you have added an inter cooled SC the only source of pure water would have to be condensation. In order to have condensation the AC compressor must be compressing. Check that compressor with the car running.