Question about 1992 Chevrolet Cavalier

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Heater-coolant hoses There are 3 metal heater pipes coming out of the firewall on my son's 92 Cavalier (air-conditioned) - the heater outlet, heater inlet and another one further over on the passenger side. This "other one" has no rubber hose connected to it (it's just open) and coolant runs out of it. It obviously needs to be connected to somewhere else, but neither I nor our mechanic can figure out what it's supposed to connect to. Have you any ideas on this? It's kind of frustrating. Thank you, Laurence

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  • mdankoski Jul 05, 2008

    I have the same problem. Was told by a mechanic it might be a drain form the heater core box in case the core itself leaks. He said if there's no pressure then it's a drain.

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Not with the 92s i broke my heater core by accident when i replaced my engine and it broke from the inside. it is a drain and if you have a sweet smell in your car replace it before its too late cause if your leaking antifreeze you have a chance on blowing a head gasket. good luck its a 30$ part at auto zone and you have to pull out your center counsile just to get to it....

Posted on Mar 10, 2009

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I have had the heater core bust on one of these before. the "extra" hose outlet you see is a drain...its farther over to the passenger side than the heater core hoses. if there is antifreeze coming out here, the core is leaking and must be replaced.

Posted on Dec 29, 2008

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If the car has dual-zone heating, then that hose should be teed into the other return hose.

Posted on Jul 02, 2008

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http://www.allpar.com/fix/heat.html

http://www.thirdgen.org/heatercore

Please remember to rate this solution. Thanks!

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See Figure 7
When adding coolant, it is important that you use GM Goodwrench DEX-COOL® (orange colored, silicate free) coolant meeting GM specifications. On these vehicles, if silicated coolant is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner; at 30,000 milee or 24 months.
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Fig. Fig. 7: Thermostat removal and installation-2.3L and 2.4L engines

To install:

  1. Position the thermostat in ite correct location, then install the cover-to-outlet pipe bolt. Tighten the bolt to 10 ft. lbs. (14 Nm).
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  3. Connect the radiator and heater hoses to the outlet pipe.
  4. Carefully lower the vehicle.
  5. Install the cover-to-outlet pipe bolt through the exhaust manifold runner.
  6. Properly fill the cooling system, then connect the negative battery cable.

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Stick with me on this
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