2002 ford excursion heater hose diagram

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04 Excursion Heater hose replacement on passenger side

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I have an 04 excursion and found a leak on the plastic Y that connects the hoses to the heater core of the front and rear heater. This part also contains the heater control valve that has the vacuum tube plugged into it. It also is attached to the firewall by a zip-tie. There are 3 ends to this hose. 1 end plugs into the metal tube on above the front of the valve cover on the passenger side. Another end plugs into the heater core on the passenger side. (The heater core is located on the passenger side, trying to clarify which side of the heater core). The final (longest) and hidden connection drops down into the abyss. I am pretty sure this connects to the rear heater core. I am not quite sure how to access the connection to the rear heater core for removal. Do I jack the vehicle up and remove the passenger side tire, then remove the covering inside the wheel well to access? Or do I attempt to reach up from underneath the vehicle? I don't think it is feasible to reach up since I wouldn't be able to get hold of it that way. Just wondering if anyone has some insight  

Bumping up to see if anyone knows. Thanks  

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Coolant Hose Check: 2002 Ford Excursion XLT 6.8L V10

Ford excursion model years - 2000, 2001, 2002, 2003, 2004, 2005.

1. Getting Started - Prepare for the repair

2. Open the Hood - How to pop the hood and prop it open

3. Locate Hoses - Locate the coolant/radiator hoses and connection points

4. Assess Coolant/Radiator Hoses - Tips for how to assess the condition of the hoses

5. More Info. - Additional information on coolant/radiator hoses

Hans Angermeier is an ASE certified Maintenance and Light Repair Technician and has produced over 100,000 videos showing drivers how to fix things on their cars. He has broad expertise on basic repair procedures covering the majority of cars on the road. Over the past 10 years, Hans has been focused on building CarCareKiosk, which is visited by millions of drivers each month.

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The video above shows to check the coolant hoses in your 2002 Ford Excursion. The coolant hoses (radiator hoses) carry engine coolant through your engine and will eventually wear out. You can avoid getting stranded by identifying signs of extreme wear before they break. In 2002 Excursions with the 6.8 liter engine, coolant leaks are most likely to occur where the hoses connect to the engine, but it can also leak from the reservoir or from the hoses. Look for cracks in the hoses and analyze the brittleness or squishiness of the hoses in your Excursion - if the hoses are hard to squeeze or squeeze very easily, it's time to replace them. Instead of using a hose diagram, this video shows you where coolant hoses on your 2002 Excursion with the 6.8 liter engine are located and the steps needed to analyze them.

Never attempt to replace a hose that is connected to your air conditioner – these hoses contain refrigerant that is under pressure and can blind you. AC problems are always best left to your professional mechanic.

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2002 Ford Expedition

2002 Ford Expedition - Heater Hose

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Gates epdm rubber, plastic heater hose, gates safety stripe epdm rubber heater hose, multiple applications, what are car heater hoses.

Heater hoses move warm coolant from your water pump or engine through your heater core and back again to ensure coolant properly cycles through the heating system. The warm coolant in your heater core provides heat for your vehicle's cabin, and the blower motor blows air over the core's heated fins before it reaches the vents. Heater hoses are made of rubber or plastic, and may be secured with hose clamps or specialty quick connectors that might require a specialty disconnect tool to remove. Like all hoses, heater hoses and their fittings can wear out over time from constant exposure to hot temperatures. The rubber of the hose can dry out, crack, or split, and plastic heater hose lines can also experience wear that can lead to leaks. Since one end of the heater hose goes to your cabin, you may see leaks at the back of your engine compartment, and in extreme cases, you might even notice antifreeze in your floorboard. A damaged or clogged heater hose or heater core could also cause your heater to fail to work as it should - but this may also be due to a clogged or damaged heater valve or other factors. If you have a coolant leak or low coolant levels , and especially if your cabin isn't getting warm, check the condition of your heater hoses. If you notice any damage, or if the heater hoses are especially spongy, brittle, show signs of cracking, or have other wear, they should be replaced to prevent an untimely breakdown and overheating. O'Reilly Auto Parts carries replacement heater hoses, hose clamps, fittings, coolant, and more to help you complete your repair.

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• 1st Gen - 1997 - 2002

looking for heater hose diagram

• Thread starter Rich_007
• Start date Jan 22, 2018

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• Jan 22, 2018

Full Access Members

2001 5.4 xlt I have a small coolant leak. I am hoping it is just a hose. Tried some stop leak which didn't seem to do any good. Figured I better fix it instead of clogging things up by trying more stop leak. Searched for heater hose diagram on here and struck out. I tried to identify the culprit but the hoses seem just out of view on the rear of the engine on the passenger side. The small part of them I can see from above show no sign of leakage and underneath I cant identify the location since it is just running along some parts and dripping off the lowest point somewhere around where the tranny mates up to the engine. Since i have heat and no coolant smell in the cabin I am thinking and hoping its just a hose and outside the firewall. Right now it only leaks sometimes. Seems to be related to ambient temp. Guess something (hopefully rubber, not metal) is expanding or contracting and letting the fluid out. About once a week I need to add about a half a gallon to the reservoir. I put the stuff i need to do a bypass in the car in case something blows before I get it repaired. Looks like i am going to have to climb on top of the engine to get these hoses changed and am trying to collect info in hopes of getting this diagnosed and repaired/replaced without getting into it multiple times.  

Well's here a thought! If you know what hose it is, why not go by a dealership, or parts store, and purchase said hose. If its a straight piece of coolant hose, why not pull it, bring it to your local parts store, measure inside diameter, buy a hunk of hose. Unless I'm missing something in your post, like you live in the boonies, and don't have another vehicle to chase parts, seems like an easy fix. Sent from my N9131 using Tapatalk  

• Jan 23, 2018

Don't know which one it is yet, or of course I would just go buy it and put it on. Was looking for some info. Guess I didn't explain it very well.  

Well the proper way to do your hose pressure test, as we've stated in the past, is to pressurise tank, observe for leak, done deal. Stant makes a nice one, is what I've used, or have a shop do. Otherwise your chasing your tail. Fun for a dog/cat, not so much for humans! Sent from my N9131 using Tapatalk  

• Jan 24, 2018

Yeah, that's what I am going to have to do. When I was at Autozone buying the stop leak a while back, they gave me a pressure kit to test it right there. I couldn't seem to make it work. Was pretty sure I had the right cap, but the thing wouldn't build up any pressure. I didn't have enough time to mess around with it and figure out why it wasn't working. I will try that again, if I strike out, I will just start taking the hoses off until I find it. Never had a leak like this I couldn't find within two minutes. Thanks.  

Sometimes you develop a small, or pinhole leak, that only shows itself under pressure. You might want to have a small local shop pressurise your system for you. Removing an old hose, then replacing it, is trouble just waiting to happen. If your going to replace hoses, replace all of them. As stated in another post, Its advisable to replace all heater hoses every4-5 years. The exception would be silicone hoses but those are usually for performance vehicles. Sent from my N9131 using Tapatalk  

• Jan 28, 2018

Rich_007 said: 2001 5.4 xlt I have a small coolant leak. I am hoping it is just a hose. Tried some stop leak which didn't seem to do any good. Figured I better fix it instead of clogging things up by trying more stop leak. Searched for heater hose diagram on here and struck out. I tried to identify the culprit but the hoses seem just out of view on the rear of the engine on the passenger side. The small part of them I can see from above show no sign of leakage and underneath I cant identify the location since it is just running along some parts and dripping off the lowest point somewhere around where the tranny mates up to the engine. Since i have heat and no coolant smell in the cabin I am thinking and hoping its just a hose and outside the firewall. Right now it only leaks sometimes. Seems to be related to ambient temp. Guess something (hopefully rubber, not metal) is expanding or contracting and letting the fluid out. About once a week I need to add about a half a gallon to the reservoir. I put the stuff i need to do a bypass in the car in case something blows before I get it repaired. Looks like i am going to have to climb on top of the engine to get these hoses changed and am trying to collect info in hopes of getting this diagnosed and repaired/replaced without getting into it multiple times. Click to expand...

Rich_007 said: This the rigid hose you are talking about? (found this pic on the net) View attachment 23552 Didn't know one ran under the intake. Thought I was losing my mind, looked at it once or twice and kept thinking, where the F%$^ is the other heater hose. But I didn't climb on top of the motor to get a good enough view. Between being busy and the fact we aren't supposed to be working on cars in the apartment parking lot, If the intake has to come off I will probably skip the risk of something going wrong and the job turning into something I cant deal with in the parking lot and end up having it towed to the shop anyway. The good news about that is I found a local shop that seems to be honest and reasonable, (I figure that's as good as it gets for a mechanic). They did my fuel pump a couple weeks ago. Hopefully will be able to get into it later in the week. Click to expand...

you can run a line tapping into the front with an elbow, then running it outside to the back, without pulling the intake off, plenty of vids out there on it lotsa vids out there also how easy it is to deal with the quick disconnects at the heater core but also lotsa info that sez impossible without a special tool, which was my experience, hose selection can get complicated cos some setups have rear heat & some hoses come with the quick connects crimped on vs universal hose clamp type fittings, that can end up not fitting i'd stick with the motorcraft parts with crimped on quick disconnects if (leaking) having to go there, but just splice in a fresh line using an adapter & hose clamps, for a temp fix  

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