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I have successfully removed the rear heater/ac but I need to know how to plug the front Y adapters properly. I purchased the plugs for the ac lines but only one of the two worked because both plugs are male and the small Y is female but the larger Y is a male so I would need a female plug. I don't know how to properly plug the heater lines or where they start from I the engine bay. Any ideas where I would fi d the hot water lines and how to plug them properly?
I am not sure which lines you are referring to (pics)?
...but it is usually good practice when changing a *circulating system* to install a bypass *loop* instead of plugs.
In other words, use a piece of tubing, hose, pipe, whatever is as close (or appropriate) to the materials where you are connecting and connect the supply to the return.
Instead of blocking the flow, you are simply bypassing the rest of the (disabled or removed) system by redirecting the flow back to the system. In most cases the system won't know or care.
Also makes it much easier to spot for maintenance or troubleshooting in the future- or to reverse the process.
I am not sure which lines you are referring to (pics)?
...but it is usually good practice when changing a *circulating system* to install a bypass *loop* instead of plugs.
In other words, use a piece of tubing, hose, pipe, whatever is as close (or appropriate) to the materials where you are connecting and connect the supply to the return.
Instead of blocking the flow, you are simply bypassing the rest of the (disabled or removed) system by redirecting the flow back to the system. In most cases the system won't know or care.
Also makes it much easier to spot for maintenance or troubleshooting in the future- or to reverse the process.
Good luck!
Here's the rear compartment that housed the heater/AC core. Now removed, the AC lines are on the right and the hot water lines are the hoses on the left.
The lines slip through the floor and run up to the front engine bay. I have a good handle on capping the AC lines, but do not know where the heated water lines come into the engine compartment so that I can cap or bypass the water going to the rear unit.
I want to leave the 4 hard lines in place that run from the front to the rear heater area, and use them as conduit for a second battery an rear LED's that I am installing where the rear heater used to be for various applications. Keep into mind that my Ex is just used as a camping/overland rig so the third row and heater/ac for third row is not necessary. Any help on where I can find the heated water lines in the engine bay would be a great help.
Try as I will, I cannot locate a coolant diagram for our trucks that shows the rear heater
You'll have to trace the lines. Here is a pic of the Heater Bypass Valve under the hood (passenger side). Maybe it can help you get started.
I don't know if the rear lines go from the engine bay or from under the dash (front heater core) area?
Good luck!
Great! I have one of the above valves with three hose connections on it, I would imagine that all I would need to do is cap or bypass the two heading back to the rear. There are two weird fittings on the lines that connect to the bottom of this valve so I need to do some research on how to get those fittings disconnected. Thanks for the assist ExPaCamper.
Great! I have one of the above valves with three hose connections on it, I would imagine that all I would need to do is cap or bypass the two heading back to the rear. There are two weird fittings on the lines that connect to the bottom of this valve so I need to do some research on how to get those fittings disconnected. Thanks for the assist ExPaCamper.
Just be aware that you have a FRONT heater core that you probably DON'T want to block. I'm guessing there is another tee point for the rear lines- that I couldn't find the diagram for.
I wonder if it branches off near the front heater core under the dash, or elsewhere?
Pull the wheel liner on the passenger side. You will see the long lines from/to the rear unit @ the point where it leaves/enters the engine bay. From there, it is simple to find the junctions you are looking for.
These long rear lines have NOTHING to do with the AC/heater valve in the photo above. That goes to the heater core behind the glove box.
Pull the wheel liner on the passenger side. You will see the long lines from/to the rear unit @ the point where it leaves/enters the engine bay. From there, it is simple to find the junctions you are looking for.
These long rear lines have NOTHING to do with the AC/heater valve in the photo above. That goes to the heater core behind the glove box.
Where do the rear lines connect to the coolant system? In the engine bay?
Do you have a pic? I haven't worked on this part yet and appreciate you providing some answers for this fellow
They connect right below the accumulator/dryer and front condenser. I did not get pics last time I was at the Mine. Easiest way around this, is to get the two fittings from an F250 that don't have the "Y" for the rear unit. Problem solved.
Recharge when done will take a LOT less Freon than before.
They connect right below the accumulator/dryer and front condenser. I did not get pics last time I was at the Mine. Easiest way around this, is to get the two fittings from an F250 that don't have the "Y" for the rear unit. Problem solved.
Recharge when done will take a LOT less Freon than before.
Okay, you are talking about the A/C lines
The Heater hoses?
My 2002 Excursion has TWO hoses coming from the bottom of the radiator.
This is the best pic of have of the A/C lines up front.
Do you see those parts there or can point to them relative to the pics?
They connect right below the accumulator/dryer and front condenser. I did not get pics last time I was at the Mine. Easiest way around this, is to get the two fittings from an F250 that don't have the "Y" for the rear unit. Problem solved.
Recharge when done will take a LOT less Freon than before.
thanks NicMike, I have purchased Y adapter plugs online. When they arrive I'll install them on each of the Y's blocking the AC. As for the heater hoses,I'll do what you suggest and remove the wheel liner to gain access for a bypass loop. Thanks again, guys. This is a great forum for the novice Diy'er. I'll post some pics of the rear battery installed next weekend or so.
...I'll install them on each of the Y's blocking the AC. As for the heater hoses,I'll do what you suggest and remove the wheel liner to gain access for a bypass loop.
Could you get a few pics of those lines/junction for the heater hoses while you are there?
I would like to see them and it might help someone else in the future
Could you get a few pics of those lines/junction for the heater hoses while you are there?
I would like to see them and it might help someone else in the future
You bet! Not too many people are going to remove their rear heater to make room for a second battery like I am doing, but i will document a few more pics for perpetuity😁
You bet! Not too many people are going to remove their rear heater to make room for a second battery like I am doing, but i will document a few more pics for perpetuity😁
But hoses and lines do fail on occasion
BTW, those hard lines from front to rear...cannot be purchased or replaced anywhere. You might want to consider posting them up somewhere. I don't know the value of them?
Even if you are the only occupant I would leave the rear AC in place, when its 100* out it takes both units to cool the cabin because of the volume.
You can mount your house battery or batteries on the frame behind the trans.
I'd use an optima battery just because there are many fabricated mounts readily available for it.
Agreed for sure. I would go as far to say that the crew cab's need rear A/C due to the volume of the cab. The Excursion will get cold enough to hang meat while my 2003 dually will only get *meh* cold. The F350 definitely strains to keep up when it's high 90's + in San Antonio, while the X has no issues at all.
thanks NicMike, I have purchased Y adapter plugs online. When they arrive I'll install them on each of the Y's blocking the AC. As for the heater hoses,I'll do what you suggest and remove the wheel liner to gain access for a bypass loop. Thanks again, guys. This is a great forum for the novice Diy'er. I'll post some pics of the rear battery installed next weekend or so.
I would be interested in the dual air factory compressor line if yours is good as a spare. This is the line in the engine bay from the compressor to the condenser.
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