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> Coolant In Floor Pan
Hamrt
post Apr 21 2012, 10:24 PM
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So I replaced the heater core in my 2002 volvo C70 about 2 years ago and everything had been running fine. Now all of the sudden I have coolant in the floor pan on both the driver and passenger sides of the car. When I replaced the heater core before, the coolant was underneath the carpet on both sides. This time the coolant is not under the carpet, it is even further down below the carpet, under the rubber and foam that is just above the floor pan. I have pulled back the carpets and cut open the rubber and the foam to expose the floor pan. Here is the strange part - the heater core doesn't appear to be leaking at all and even after running the car for over an hour with the heater running full on, there are no visible leaks. Last time it was easy to see that the heater core had gone bad and was leaking. I also looked at the ac drain that is just under the heater core and that appears fine as well. I am pretty stumped here. Has anyone else experienced this or any ideas what to check? Again, no drips or leaks from the heater core and I can't see anything coming from the 2 coppers pipes in the firewall. Is there anywhere else that coolant could be leaking from that I haven't mentioned?

Thanks for any thoughts,

Mike
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NalleyVolvo
post Apr 23 2012, 07:04 AM
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Are you sure this coolant is new, and not left over from the first time there was a leak? Was the entire climate box and casing checked for coolant before everything was closed back up? Even then, I would imagine the condensation channels would have taken care of it.
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mykael
post Apr 24 2012, 01:10 AM
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Try looking for leaks when its cold - engine, air-con, atmosphere. Metal expands when it gets hot and that could be enough to seal any weeping joints or welds...
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meaningofsoul
post Jan 15 2013, 01:44 PM
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QUOTE (Hamrt @ Apr 21 2012, 09:24 PM)
So I replaced the heater core in my 2002 volvo C70 about 2 years ago and everything had been running fine. Now all of the sudden I have coolant in the floor pan on both the driver and passenger sides of the car. When I replaced the heater core before, the coolant was underneath the carpet on both sides. This time the coolant is not under the carpet, it is even further down below the carpet, under the rubber and foam that is just above the floor pan. I have pulled back the carpets and cut open the rubber and the foam to expose the floor pan. Here is the strange part - the heater core doesn't appear to be leaking at all and even after running the car for over an hour with the heater running full on, there are no visible leaks. Last time it was easy to see that the heater core had gone bad and was leaking. I also looked at the ac drain that is just under the heater core and that appears fine as well. I am pretty stumped here. Has anyone else experienced this or any ideas what to check? Again, no drips or leaks from the heater core and I can't see anything coming from the 2 coppers pipes in the firewall. Is there anywhere else that coolant could be leaking from that I haven't mentioned?

Thanks for any thoughts,

Mike


I just discovered a similar problem on my '01 S60. Coolant dripping off the brake pedal and pooling in the driver side well. If you could say, how much did this end up costing to repair?

This post has been edited by meaningofsoul: Jan 15 2013, 01:48 PM
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mykael
post Jan 16 2013, 01:12 AM
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If it's the heat exchanger, it's not going to be cheap. Problem is you have to remove most of the dashboard to get at it. I had one done for about A$1,800 - and that's with the garage using a technique of only removing half the dashboard and cutting some pipes to make it quicker.
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