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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2005 Mitsubishi galant heat doesn't work. Blower works and air conditioning work but no heat comes out. Coolant is full. Just feels like outside air temp with heat on hot.

Your thermostat may be stuck open and your coolant isn't getting hot to warm the cab.Here's a link on how to replace,very easy to do.Don't let your pets near spilt coolant,will kill them.

Oct 11, 2013 | Cars & Trucks

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I own a 1996 bereft z26 I am leaking coolant from behind the engine from a hose coming through the firewall......... The rubber hose is actually coming out of a metal is shaped like a spark...

there is a small metal radiator, called a heater core, which sits inside the car. air is blown over it to provide heat inside the car. it is connected to the cooling jacket of the engine by two rubber hoses, one to bring hot coolant in and the other to return warm coolant back. either you have a leak in the core or a heater hose, from your description i cannot tell which. if it is a hose it will be a very cheap part to replace and a short bit of labor. if it is the core it will be much more expensive. i would find someone who knows the difference to take a look at it, probably not a good idea to drive it in its current condition. if it is a bad core, a short pipe can be put in place between the hoses to take the place of the leaking core until you can get it fixed. abot 90% of all the jeeps i ever rode in had this as a permanent fix for a leaking core but it is very cold in the winter.

May 13, 2011 | 1996 Chevrolet Beretta

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My van is leaking antifreeze from somewhere by the firewall of the van not the radiator. Its the metal hose that has a hole in it but i can't figure out the name of these metal (aluminum)hoses.

The metal hose by the firewall is either your heater core inlet pipe or outlet pipe. These inlet and outlet pipes will develop leaks for a varity of reasons. If this is the source of your leak, you may want to replace the entire heater core which is much easier than trying to fix the leak. The attached link will help you.

Please remember to rate this solution. Thanks!

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1 Answer

Where is the thermostat located on a 1995 Cavalier 2.3 lt?

see instructions below from Also, please see my tip at .

2.3L and 2.4L Engines

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.
  1. Disconnect the negative battery cable.
  2. Properly drain and recover the coolant to a level below the thermostat.
  3. Unfasten the cover-to-outlet pipe bolt, which is accessible through the exhaust manifold runners.
  4. Raise and safely support the vehicle.
  5. Disconnect the radiator and heater hoses from the outlet pipe.
  6. Unfasten the outlet pipe-to-oil pan bolt and the cover-to-outlet pipe bolts.
  7. Remove the thermostat, then clean the old gasket material from the mating surfaces.


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).
  2. Install the outlet pipe-to-oil pan bolt. Tighten the pipe-to-oil pan bolt to 19 ft. lbs. (26 Nm) and the pipe-to-transaxle bolt to 40 ft. lbs. (54 Nm).
  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.

Oct 09, 2010 | Chevrolet Cavalier Cars & Trucks

3 Answers

1999 Cavalier has leaking coolant pipe leaks

it the metal lines but the leak is in the hose cut the hose off get 2 hose clamps and a rubber hose big enough to slide over the metal ends hope this helps

May 07, 2010 | 2004 Chevrolet Cavalier

1 Answer

Coolant leak in VW Golf mark 5 1.9 TDi auto DSG

There is, however, an air outlet into the driver's foot area. If the heater core is leaking, the air coming through the heater core will carry the droplets into the entire air ducting system. The driver's foot area may be the closest outlet. If it smells like coolant, you need to replace the heater core regardless of where in the cabin the coolant is coming out.

Jan 19, 2010 | 2001 Volkswagen Golf

3 Answers

1990 Pontiac Grand Am 2.5 L engine. Leaking Coolant from fire wall below blower unit from a rubber elbow below a Air conditioner line. Coolant tank had hard crystalized coolant in it. Washed out...

That drain line is for the box that holds the air conditioner evaporator and the heater coil. It seems that your heater coil has sprung a leak and the leaked fluid is coming out the drain. You have to replace the heater coil, which on most cars involves removing a lot of the interior equipment, including the dash board on many cars. A job best left for the repair shop unless you're very adventurous and patient. Even then you will have to take it to a shop to have the air conditioning system recharged.

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1 Answer

Replacement of Water Pump. 2001 Chevy Cavalier 2.4 L

Stick with me on this
1.Put the car on jack stands
2.Remove the exhuast manifold, Do not rotate the flex cuopling more then 4 degrees od damage will occur.
3.Diconnect the coolant inlet pipe from the water pump outlet hose, Disconnect from the engine, disconnect it from the thermostate housing and remove it.
4.lower the car back down of the jack stands.
5.Detach the brack booster hose.
6.Remove the timing chain cover and the tensioner.
7.Remove the heater outletpiper from the water pump.
8.Remove the water pump cover bolts.
9.Remove the water pump retianer nuts.
Remove the old gasket and clean.
10.On bench. Install the waterpump and cover but lreave the bolts finger tight.
11.Install back in car, leave water pump bolts looseto allow for positioning.
12.Install water pump cover to engine, tighten by hand.
13.Lubricate oringand install metal outlet pipe back into pump, hand tighten.
14a.Tighten the water pump to timing chain nuts
14b.Tighten the water pump cover to water pump housing bolts.
14c.Tighten water pump cover to engine block bolts.
14d.Tighten the radiator outlet pipe to water pump.
15.Install timing chain tensioner.
16.Install exhuast manifold.
17.Install exhuast pipe.
18. Fill it up and bleed the system.
Good luck

Jul 02, 2009 | 2001 Chevrolet Cavalier

1 Answer

Heater core blowing cold and leaking coolant

Locating the connections from the engine compartment to the heater core shouldn't require a diagram.
Check the hoses and their paths and you will find two that go through the firewall via a fixed connector; these are the in- and outlet for hot water circulation. Since the hoses have had a dozen years to weld themselves to the fitting, they probably won't be easy to remove; it may be necessary to **** them with a razor blade and pry the hose from the fitting.
If you have a little junk pipe pieces at home, either 1/2 or 3/4 should be a fit to couple these two ends together after they are removed from the connectors that you'll find at the firewall. 

Feb 28, 2009 | 1997 Pontiac Grand Am

1 Answer

Heater won't blow hot air

have the heater core flushed. the heater core is a smaller radiator located in the air duct. open your hood, look at the firewall(wall closest to the seats) you should see two hoses a couple inches away from each other going to the radiator. unhook one, from the firewall connection, coolant will flow. then kink the hose so the coolant from the radiator doesnt drain. unhook the other hose from the firewall connection. now you have two pipes protruding from the firewall. get a hose and run it through one side and it'll come out the other. probably a lot of grime. now hook the hoses back up.
it could also be the switch

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