There is a drain on the outside firewall that is clogged.
You are experiencing the classic symptom of a leaking heater core. They aren't cheap. Some stop-leak in the radiator might get you through the interim if you need to budget it.
This would be caused by a leaking heater core, or a leak in the plumbing associated with it.
If its inside the cab at the firewall, its probably your heater core which is located on the passenger side under the dash. This repair is usually not much fun. If its leaking in the engine compartment near the firewall, its probably a heater hose that is failing. This is an easy repair
The radiator will need to be replaced. Sometimes, it may seem that the radiator itself is leaking but it could be the radiator "hose" that is leaking. In this case, the radiator hose needs to be replaced and clamped tightly.
The heater core (a small radiator for your heat) is leaking, I would suggest a new heater core as they are about as cheep to replace as they are to repair.
The ac drain is plugged. The drain hose is on the firewall on the lower passenger side. ...that, or your heater core is leaking.
Check radiator hose, leaking water pump, look for hole in radiator, leaking coolant bottle or leaking seals.
Be more informative on "over heats". Is it being driven along time before it over heats? Is the guage showing hot but not boiling out the radiator, is there steam coming from under the hood, is there a sign of leaking under the passenger side dash or under the firewall on the ground, have you had the thermostate replaced, is the water pump leaking?
Maybe it's not the radiator. Maybe it is one of the radiator hoses that is leaking. Or possibly the radiator cap or a level sensor.
foggy windows on passenger side.... smell of antifreeze in car... lost of radiator fluid.. lose of power..
You have a leaking heater core. you can try radiator sealer but that may only work for a short time.
The heater core is leaking. The whole dash has to come out to fix it. Even master mechanics dread a heater core repair. Try some alumapowder in the radiator. Try some of this, it really works and stops leaks without plugging up the radiator.
"transmission fluid leaking from fitting below radiator cap after replacing radiator on 99 surburban
If it is leaking on the passenger side I would agree with them; the drian hose could be opened up with caompressed air.Good luck.
Leaking radiator? Leaking or loose radiator hose?
It could be the radiator, the hoses, a leaking coolant tank or the water pump.
maybe your radiator is broken and you need to get a new one or just get a reparation if the radiator starts leaking when is in use it may be leaking because of the pressure of the water.
needs a new heater core
You need to explain more on where exactly the coolant is leaking. There are several possible reasons why your coolant is leaking. If it's from your main hoses that lead to and from the engine or radiator, you need to check the condition the hoses are in. If they're in a decent condition, it's not that. If it's leaking around where the hoses are connecting, it's probably not tight enough, or there is possibly a clog in your coolant line. Also get your radiator checked. If it's leaking into the passenger compartment, it's most likely the heater core.
Some typical radiator repair jobs are leaking hoses, leaking radiators or loose connections.
Several possibilities: 1. Radiator is leaking. 2. Coolant hose is leaking. 3. Hose clamp is loose. 3. Seal on water pump is leaking. 4. Overflow container is leaking. 5. Radiator clamp is loose or bad. Two highest possibilities: Radiator or hose is leaking.
If the hoses are all tight, Then the radiator must be leaking. REPLACE RADIATOR
Sounds like a head gasket. Check for white smoke tailpipe when running.
Having to add collant & coolant leaking from the hose.