Front passenger foot well is wet, and I can't for the life of me figure out where the leak is, however I suspect it's coming in via the squirrel cage fan. When I took the plenum cover off, there is a cover over the cage fan and it had lifted slightly on one corner. It didn't appear as if it would misdirect the flow of water to the drain but it would have affected the seal around it. This and the fact that it seems to blow moist air after it's been raining has me wondering.

So far there seems to be no coolant loss and the smell is just pongy carpet, not coolant.

I have sealed the grommet where the amp wire perforated it with silicone.

I have done the bucket test over the windshield, door window, nada.

The underlay on the back plate is dry. The carpet near the door is dry so it's either dripping on the carpet via the vent pipe/s or is sneaking in on the transmission side.

Grommet on the floor is kosher, so is the one above the wheel arch.

Just put a zip lock bag over the vent exhausts, not expecting joy though.

Is there anything I can do to definitely find this leak? Feedback as always much appreciated :)

Try the Heater core hose connection at the connection to the firewall? I know you said you did not think it was coolant but its worth a look.

I had a pin hole leak at that point and got the wet passenger floor and once this was found and the hose replaced it was fixed.

It took awhile for the moisture to build up and i didnt see coolant loss at first until the pin hole got bigger i think it was due to the demister being used on a rainy day. I had mist blowing from the demister vents also on a really rainy day when i had the windscreen fogged up quite a bit.

Cheers

That definately sounds like a leaking heater core!

bugger. thanks ppl.

Would check to see if anythings cought in the water run off part
Could have leaves stuck in there causing a blockage

check the drain on your evaporator box as well, if its blocked then it can flood the foot well

Booked it in :($

I'll let you know what it was.

Sadly my mech couldn't see any issues and referred me to a radiator place (as he doesn't have the correct pressure testing equipment). From what I understand they have to remove the dash to do a pressure test on the core. Is this true or have I got my wires crossed? I don't really want to spend more $ until I'm sure it's the core.

Also, If I want to test for sure that it's the heater core if I loop the hose back to the engine, can I do it on the fly or should I drain the cooling system first? Looks pretty high up so I imagine it wouldn't be too sloppy.

I'm still not convinced because it's been dry weather and I haven't detected any moisture in the pan, but the air smells damp when you turn the fan on. Still no detectable loss of coolant :(

So, ima going to go through the car wash tonight and check it again. If wet, back to mechanics. If dry, see how it goes. If it gets damp again then I'll loop the hose and see if it stays dry.

What a pain in the arse!

just on the passenger side near the bonnet hinge fill it with silcone BAM no more water leaks ill take a pic l8a when i get home and post it up

^ ty. I tested it again last night and found it damp on top of the wheel arch. Thankfully it's not heater unit :)

Well it turns out it was perished seals on the plastic bits underneath the vent covers (both sides). Bestial.

On the off chance, before you spend money on any professional opinon. Just check for rust where the wheel well joins the cabin. My car was rusty along there. There was a tiny slit of rust, and when I rubbed at it, it revealed a decent amount of rust, which when silliconed over stopped the water.