Water/coolant in the driver door footwell

46m3csl · 11-01-2018, 02:33 PM

So I got a low coolant warning sign , just topped it off with distilled water and within hours the driver footwell is soaked with water. Could else here misting trickling water when driving with ac on? Cant see any visual leaks, also took the undercover off and left the car idle for 30mins . No drips on the floor, any suggestions?

Else the car has not been washed or drained on fyi.

IllSic_Design · 11-01-2018, 02:42 PM

Could be the evaporator/heater core is leaking/cracked. It is behind the dash in the center, look for anything coming from that area.

46m3csl · 11-01-2018, 02:45 PM

Quote:

Originally Posted by IllSic_Design

Could be the evaporator/heater core is leaking/cracked. It is behind the dash in the center, look for anything coming from that area.

That's what's am worried about, am assuming the heater core runs water/coolant through it?

IllSic_Design · 11-01-2018, 02:48 PM

Quote:

Originally Posted by 46m3csl

That's what's am worried about, am assuming the heater core runs water/coolant through it?

Yes, it's how you get hot air.

46m3csl · 12-02-2018, 03:16 PM

so is this the hose or the heater core? Has anyone replaced the hose and solved the problem? Does the dash need to be removed for this?

46m3csl · 12-02-2018, 03:20 PM

gbalthrop · 12-02-2018, 06:14 PM

Quote:

Originally Posted by 46m3csl

so is this the hose or the heater core? Has anyone replaced the hose and solved the problem? Does the dash need to be removed for this?

I can't tell for sure from your video but it appears that the leak is from where the hose fits on a heater core fitting (Plastic I presume?) and that any bumping/ jiggling of the hose causes drops to visibly leak.

Would need to carefully remove/cut away that hose (when you have a replacement available), and carefully inspect the tube/ fitting the hose is mounted on for any cracks or fatigue. With any luck, it is brittle plastic which can be reinforced by good epoxy like JB-Weld, without having to remove the old core. NOT the easiest thing to access -- hope you're lean, mean and ambidextrous.

Here is the TIS Procedure for replacing the "Heat Exchanger:"
https://www.newtis.info/tisv2/a/en/e...ntrols/PIXPIwK

George

11-01-2018, 02:33 PM	#1
46m3csl Captain 121 Rep 774 Posts Drives: 335i Join Date: May 2010 Location: Rowland Heights iTrader: (0)	Water/coolant in the driver door footwell So I got a low coolant warning sign , just topped it off with distilled water and within hours the driver footwell is soaked with water. Could else here misting trickling water when driving with ac on? Cant see any visual leaks, also took the undercover off and left the car idle for 30mins . No drips on the floor, any suggestions? Else the car has not been washed or drained on fyi. Last edited by 46m3csl; 11-01-2018 at 02:45 PM..
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11-01-2018, 02:42 PM	#2
IllSic_Design Colonel 2124 Rep 2,758 Posts Drives: 09 E92 335i Join Date: Jun 2016 Location: Northern California iTrader: (1)	Could be the evaporator/heater core is leaking/cracked. It is behind the dash in the center, look for anything coming from that area.
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12-02-2018, 03:16 PM	#5
46m3csl Captain 121 Rep 774 Posts Drives: 335i Join Date: May 2010 Location: Rowland Heights iTrader: (0)	so is this the hose or the heater core? Has anyone replaced the hose and solved the problem? Does the dash need to be removed for this?
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12-02-2018, 03:20 PM	#6
46m3csl Captain 121 Rep 774 Posts Drives: 335i Join Date: May 2010 Location: Rowland Heights iTrader: (0)
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