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I have a 1990 cavalier and it is leaking out at the firewall. There is a L shape hose not connect to anything. Please explain this.

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This is likely your drain from the the ac or from the air plenum which feeds air to your heater. Which ever it is, it should go to the outside of the car.

Posted on Jul 24, 2008

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2000 cavalier z24 2.4 motor antifreeze leak down on to oil pan driping when off


Check your hoses going to the heater core,they are going thru firewall.Fell thehoses for coolant. Hose Clamps may just need to be tightened.

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02 Town&Country LXi. A/C leaks into interior at firewall.


Sounds like the drain to the ground is stopped up.
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I have a l shaped house on my firewall as soon as i poor coolant in the overflow tank it runs out of this house


A hose on the firewall is usually a connection to the heater core behind the firewall (which provides cabin heat when the heater is on). If the hose is leaking, it's a simple and inexpensive procedure to replace it. If the leak is coming from BEHIND the firewall, the heater core probably has a leak and should be replaced.

Jul 06, 2011 | 1997 Pontiac Grand Am

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Heater coil has bad leak,fogs up window,leaks in floor,i just want to know how to find hoses and connect them,have to go to work in morning,need temporary fix


There will be 2 hoses going through the firewall. Follow them to the motor, and pick one that will be long enough to disconnect from the firewall, and then hook it to where the other hose is on the engine. You cannot block the flow, but you can bypass the heater core.

Oct 04, 2010 | 1990 Ford Tempo

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My car is leaking anti-frezz from a L shape hose that comes out of the firewall and my car is stating to overheat.


Get it fixed, hoses that go through the firewall are usually part of the heating system. If your car has is overheating, it's is possible to warp the heads-worse case scenario. Cast iron heads are more forgivable, but aluminum heads are sensitve.

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1 Answer

Bad leak from little 2 inch L shaped hose next to lower firewall


its either the hose,or the heater core.
the core can crack where the pipes meet the core and
if you can smell antifreeze in the car and the windshield fogs,it is the core....the hose can also crack on the inside of the firewall and get misdiagnosed as a heater core.
big job,the dash has to come out

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1 Answer

2000 chevy cavalier having coolant leak. Found a small rubber elbow hose about 2 and a half inches comming out of the firewall leaking coolant while engine is running and dripping while engine has stopped...


That hose is the drain hose for the air conditioner evaporator. If it is leaking coolant, there's a good chance that your heater core is leaking, as it is in the same 'box' that the air conditioner evaporator is in. You'll need to replace the heater core.

Apr 24, 2009 | 2000 Chevrolet Cavalier

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if its leaking inside the truck it needs to be replaced, a bit of a job, under the kickplate pass sideu can see where the hoses connect to through the firewall on pass side

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Is it the heater core


you more than likely have two problems. first the heater core then either the heater hose or the clamp is bad

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