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I need the dimensions of a heater hose to bypass the heater core...I'm losing antifreeze by the gallon.

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Maybe if you posted the exact brand and model......

Posted on Jul 10, 2008

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I need to know were can i locate the heater core and detach it from inside a 1995 oldsmobile acheiva and how to remo


The heater core comes out from the engine side of the firewall. The hot water hoses are connected to it.

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Heater works only on driver side 2013 Chrysler 200


I have the same problem so I went to the dealership and they said that chrysler has a memo out for the problem. They told me that there was a bad batch of antifreeze and it clogs up heater core. Now they have to change heater core, rad, thermostat, and radcap flush system. So don't wait take it in hope this helps

Nov 12, 2013 | Chrysler 2013 200 S

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I have a 1999 f 150 pick up. I cant get any hot air from the heater. The thermostat is good the heater core is good the blend door is good the blend door actuator is working. When the selecter knob is...


The AC compressor should come on for defrost mode - regardless of the temperature setting. This help to ensure dry air is delivered to the inside of the windshield. If the air were humid (damp) it would condense when hitting the cold glass - cause frost to form almost immediately on the inside of the windshield.

There should be a couple of hoses that run into the firewall of your truck to connect to the inlet & outlet of the heater core itself. When the engine is at normal operating temperature (depending on outdoor temperature this could be 5 - 15 min or more at idle - less if being driven), these hoses should be as hot as the radiator hose. If they're not, it would explain why you don't get any heat in the cab. Repair or replace any hose that is pinched, kinked or crushed.

Make sure that the cooling system is FULL. This is done by checking the coolant level in BOTH the overflow reservoir AND radiator itself. There is a very real scalding danger if you attempt to remove the cap of a radiator when hot. Allow several hours of cooling before attempting. With the engine off AND cold, open the radiator cap and inspect the level. It should be right up to the bottom rim of the filler neck. Set the heat temperature to HOT and the fan to HIGH. Start the engine and let it idle. While it is warming up, check the coolant overflow reservoir level. It should up to the COLD level mark. Top it off as needed with a 50/50 mixture of water and compatible coolant for your truck, and recap. Check the coolant level in the radiator again. If it appears full, gently increase the engine RPM be stepping on and off the gas pedal a few times to help dislodge any air bubble in the system that may be present (or have a helper do it while you watch the coolant level in the radiator fall and rise). This is only effective if the engine is at normal operating temperature (thermostat is OPEN). Return to the radiator an check the level again. Slowly add a 50/50 mixture of water and compatible coolant for your truck as needed. Rev the engine slightly a couple of times again to help ensure any air in the system has been displaced and top off with coolant as needed - close the radiator with the cap. Note the overflow reservoir level and allow the engine to reach normal running temperature. Once the engine has begun to warm up, DO NOT remove the radiator cap again until the engine has been allowed to cool completely. You should be able to be able to see the coolant level in the reservoir if the coolant in the radiator has been brought up correctly. The cooland level in the overflow reservoir should now be at HOT. If it is at any level lower than the HOT mark, top it off with a 50/50 mixture of water and compatible coolant for your truck. If the reservoir was emptied completely while running the engine, you should stop, allow the engine to cool and start the process over again. Once you are sure the coolant level in the radiator is full, and the overflow reservoir is never allowed to go empty, you can monitor the level and add coolant to the system via the overflow reservoir. This means the the entire system is flooded with coolant - and no air "pockets" exist.

If still unable to get heat, it may be a result of a clogged hose or heater core, or a stubborn air pocket in the heater core itself or inlet / outlet hose. With an empty bucket or container & cold engine, you could remove one hose and pinch or close both openings. Next, open slowly / briefly see if antifreeze flows FROM the heater core to the end of the hose while directing the flow into the empty bucket / container. Allow the coolant to drain until you're satisfied that any trapped air has been pushed out by coolant from the radiator thru the hoses and heater core. Reconnect hose.

Good luck!

Oct 31, 2013 | Haynes Ford Pick-ups, Expedition and...

1 Answer

Water is dripping from behind the glove box. The drip is slow when the heat is on, and very rapid when the A/C is on. I don't notice much of a drip as long as the heat or A/C is off.


Your heater core is most likely leaking or possibly the hose connecting to the firewall. Bad situation either way as it needs to come out for repair. Might need to remove glove box and associated plastic around the area to get at the heater core. Remove heater hose attached to firewall in engine compartment(2) Will drain water so be careful. To drive vehicle w/o using either heat or cool attach the two hoses you just removed by using a pipe that fits tightly inside them and a screw clamp on both hoses. this will get you by unitl you can fix the core.

Apr 20, 2013 | 2007 Chevrolet Chevrolet Cobalt LT

1 Answer

How to replace a heater core on 1990 ford aerostar


IT'S BEHIND THE GLOVE BOX MAKE SURE YOU MARK THE HOSE SO YOU DON'T CROSS THEM SOMETIMES IT'S EASY TO REMOVE THE HOSE FROM UNDER THE HOOD NEAR THE FIRE WALL AND SOMETIMES IT'S EASY FOR INSIDE

Sep 25, 2012 | Pro Tools 1991 Ford Aerostar Heater Core

1 Answer

Coolant leaking in floor boards. How do i bypass now until I get another core?


Remove both hoses from core at firewall. Loop one of them back to where the other one attaches to the engine. Remove and store the second hose. Let me know if you have more questions. Please specify model, year and engine size if you need more help.

Aug 28, 2011 | Air Conditioners

1 Answer

Heater core replacement on a 1994 astro van


1 Drain the van's engine coolant. With the engine cool and the parking brake applied, remove the radiator cap, place a large container under the radiator drain and remove the drain fitting. After draining the coolant at the radiator, move the container to the engine block and remove its drain plug to drain the remaining coolant.

2 Remove the coolant reservoir by disconnecting the overflow hose from the radiator filler neck, removing the fasteners for this reservoir and the windshield washer fluid reservoir, lifting both up and separating the coolant reservoir from the other one. This is needed if the van is a 1994 model or older. On newer models, disconnect the reservoir for the windshield washer fluid by removing its bolts and moving it aside.

3 Detach the heater hoses from the heater core tubes at the firewall by loosening their hose clamps. Plug the core tubes with rubber to prevent contaminants from entering.

4 Reach under the dashboard in the van's passenger compartment and remove the screws for the heater core cover to remove it--the cover should have a half-cylinder shape. Remove the two mounting screws at the rear of the heater core and lift the core out of its housing.

5 Insert the new heater core into the housing and fasten it with the mounting screws. Connect the core cover back in place.

6 Unplug and reconnect the hoses to the heater tubes with their clamps. Reconnect any components (like the washer fluid reservoir or coolant reservoir) that you disconnected to access the hoses.

7 Refill the coolant after replugging the drains at the radiator and engine block. Add the 50/50 mix of water and antifreeze to the radiator until it's full and the reservoir to the lower mark. Run the engine in a ventilated area with the radiator cap off until the upper radiator hose is hot, shut off the engine and let it cool, then add more coolant up to the reservoir's lower mark.

Jun 27, 2011 | Air Conditioners

1 Answer

My rodeo got hot march 11 and hadnt been getting hot any time before that but i filled it with antifreeze drove it 23 miles started getting a little hot again parked it over night and went out started it...


When you "Filled it with antifreeze, how many gallons did it take? Also, pull the oil dip stick and look at the oil on the stick. Does it look milky? If so, you have a blown head gasket and that's where your water/antifreeze has been going.

Mar 12, 2011 | Air Conditioners

1 Answer

My car heater was not blowing warm air so i changed the thurmastat then took it for a ride the heater was still blowing cold air the car temp went up and blew a hole in my headgasket so i fix the water...


The heater uses water that circulates from two positions on your car engine. One is the inlet hose and the other is the return hose. they are usually about 3/4 hoses clamp to two nipples on the heater that extends through the fire wall. If those hoses are blocked or plugged up, no water can circulate and your blower just passes cold air through the heater core. If the core is blocked up by gunk or rust , it will do the same thing.

You are going to have to test the hose and heater core to see if it is blocked. Find the heater hose connections on your engine, take the clamps loose, Put one hose end in a bucket and adapt your garden hose to the the other end so that you can tell if you have good flow through the hoses and the core.

Nov 30, 2010 | Air Conditioners

1 Answer

1998 gmc envoy heater problem, fan is working fine but is blowing cold air on defrost and heater.


Do you smell antifreeze? If you do, then your heater core needs replacing.
If not then try these solutions:
Priority Action Part Type Cause 1 Inspect Cooling System Mix Coolant level low or flow is restricted. grey_line.gif 2 Inspect Thermostat Thermostat stuck closed grey_line.gif 3 Inspect Heater Control Valve Leaking or defective heater control valve.

Jan 19, 2009 | Air Conditioners

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