1991 Honda Civic 1991 Honda Civic Coolant Leak

Tiny
SLEEPING FOREST
  • MEMBER
  • 1991 HONDA CIVIC
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 197,500 MILES
Ok yesterday I discovered a coolant leak in my car. But it's in an unusual place. It's leaking in to the floor on the passenger's side because the carpet is wet. What could be wrong?
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Thursday, October 8th, 2009 AT 10:33 AM

4 Replies

Tiny
HONDA TECH 1818
  • EXPERT
Your heater core could be leaking, just look under the glove box and you will see a big black heater housing there, if you see coolant leaking from there, your heater core is leaking.
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Friday, October 9th, 2009 AT 12:14 AM
Tiny
SLEEPING FOREST
  • MEMBER
Do you have a diagram of what it looks like?
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Friday, October 9th, 2009 AT 11:28 AM
Tiny
HONDA TECH 1818
  • EXPERT
I was unable to upload a diagram, but it involve in removing the dashboard and lots of other components to replace the heater core. You should try radiator stop leak to see if that will stop the leak.
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Friday, October 9th, 2009 AT 8:43 PM
Tiny
KHLOW2008
  • EXPERT
Did you confirm it is coolant or just water that is causing the carpet to be wet? Coolant leakage into cabin would have the radiator running dry, make sure you check the level.

Coolant would be from the heater core as answered by kng1818 but if it is just water, it could be the the AC evaporator (cooling coil) housing drain hose has been dislodged or clogged .

You would have to remove the dash to get at the heater core.


http://www.2carpros.com/forum/automotive_pictures/192750_DAshRemoval91CivicFig13_1.jpg



This is the heater unit under the dash.


http://www.2carpros.com/forum/automotive_pictures/192750_HeaterAssy91CivicFig01_1.jpg

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Saturday, October 10th, 2009 AT 11:02 AM

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