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I have a 2004 civic LX with a weird coolant leak issue and I did a search, but found no answers to this particular issue, so I decided a new post is in order.


First a bit of history. I was driving and the heater blew cold air and the temp rose dramatically. I immediately parked and let it cool down. I limped it home as I was close and checked my coolant level, which was non existent. I replaced the coolant and issue resolved for about a month.


Last night I was driving and noticed that my heater would only blow hot at higher speeds. SO I added new coolant and did all the preliminary checks for a blown head gasket. There's no milky oil, no white smelly smoke, and coolant flows fine, although I noticed that this time when I refilled the coolant/water mix (50/50), it was a bit foamy. so I drive to work about a mile and park. After a bit, I notice coolant leaking form the rear passenger side of the engine. At first I suspected a heater core, but my passenger side foot well is dry as a bone. I'm not suspecting the water pump, because logic tells me that water pumps are located by all the belts, under the AC pump and alternator. the foamy coolant has me worried a bit because a head gasket replacement at this point would be too expensive for me.


Any help with this would be greatly appreciated.

 
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I did a search and came up empty.
I have a 2004 lx that's leaking coolant at the back of the motor on the passenger side. At first I thought it would be a heater core, but my passenger foot well is dry as a bone. I don't think it's my water pump because if logic serves, the water pump is ion the opposite side along with the AC pump and alternator. I also don't think it's a head gasket because it's a physical leak, as in I drove it to work today and can see it dripping. I also have no milky oil, or smelly exhaust. I do, however saw that my coolant/water mixture was a bit foamy when I filled it this morning. Dunno if that means anything though


Does anyone know what is carrying coolant to that area of the motor? I have only one day off tomorrow and would rather not spend it at a shop getting it fixed, plus my funds are extremely low and If I can just replace a hose or clamp, that would be awesome.
Thanks in advance for any help you may provide.

 
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are you SURE its coolant?...that is my first question,

second, you shouldt be using a coolant/water mixture, honda blue coolant is premixed, what kind are you using?

 
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2nd video, 1st post.

https://www.civicforums.com/forums/3...reference.html

 
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Heater core send and return hoses are located on the passenger side firewall

 
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Honda blue. It's already 50/50

 
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thanks! I'll look at it tomorrow

 
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Most likely is leaking from the heater control valve:

http://photobucket.com/gallery/http:...valve.jpg.html

 
Rep Power: 517

SOMEone is gonna have to actually look for themselves and find where the leak originates.

"Borrow" a cooling system pressure tester from DangerZone and use it?
Jack and stands, creeper, flashlight, mirror, whatever it takes to see it and confirm.