Hello everybody! Good day to you! Welcome back! I'm glad you guys are here I know I am super glad to be here This thing right here. It's 2004. Doge Ram 2500 I think it's got the Five Nine diesel. uh I believe we have some AC issues going on with this thing.

Uh, customer requested that I replace the evaporator, but I uh I'm gonna need to kind of figure out what's going on with this I uh before I do such things because in order to replace the EVAP core stockings engine, we have to pull the dash out and I don't like pulling the dashes out of cars. so let's make sure we need an evaporator before I install any evaporator at 161 424 miles on the odometer now I Understand that at temperatures above 90-ish degrees it uh, it kind of falls on its face a little bit and uh, it does not cool as well as it should. So what I'm going to do is we're going to swing this into the shop I'm going to throw some thermal meters into the vents I'm going to connect my machine to the system and we're just going to do a like a performance evaluation first and uh, see what's going on. Make sure the pressures are in Spec We're gonna make sure the fans are working, we're going to make sure that the drain is draining, and I'm going to try to find out what's causing the symptom before we pull a dash out of it and an attempt to replace components.

So stay tuned because this is going to be a very good video opening. Z Hood Again, we're running into a situation here. I Can't really get oh, he's gonna do the thing before he's moving it. Good job Broham.

We're gonna make it past the door too. We're about to drive a doge under a Mazda let's see how this works out. Yeah I'm gonna swing clear that door looking good. Oh, we're totally looking good.

This is fantastic. I Do not think that I need to lift this up on the lift just yet. Like I said, we're just gonna nose right into the corner here see what kind of temperatures. Okay, we'll put one right here next to the air freshener and one over here on the passenger side as well.

Crank this thing up full blast in our face. Recirc is on AC is on temps coming down. let us hopping the hood and uh, we'll take a look at what's going on. All right Ramicus, what's going on down here? Hello Daisal 24 pounds, All right our fan is Fanning This is good I Know the compressor's running.

it's all so good. Hey check that out. Come air horns All right! So we need to tap into the system. Here is our high side service valve: foreign.

They always leak I Don't get it I Want to do a real quick leak check on this valve right here. So what I can do is we'll drop a little bit of machine oil in there. Look for some bubbles to come out, that valve leaks. We'll see the bubbles start to Bubble Up from the seal and then we'll have at least one confirmed leak.

It might not be the problem, but it could be a problem. Foreign? Okay, we got a leaker. All right. that's enough for me here.

Let's remove the contaminant the air. There we go. Very good. Okay, next up we're gonna connect our service ports to our AC machine at the high side.

Turn the valve so we'll stop. We don't need to make it, take it tight and it's not about can be located here on the line up next doing is looking to take the record off the treasures and make sure that none of them are out of spec. Oh that's crazy that feels there's ice on that. Look at that.

Yeah, there's there's ice on that line, but we don't need ice. It's not okay. That's what we've got here. We're 250 260 climbing a little bit and our low side is super low and that that might be okay, but that's down there pretty far.

Let's power this thing up. powering on, booting up. So now that we have an idea of kind of where our pressures lie, let's take a look at our temperatures. That's not okay.

that's 80 degrees on this side and we are at it. was 58 degrees on this side and just to make sure we are set for cold cold cold Okay, so there is something going on with the uh, we, uh the system here. Let's go ahead and shut her down and we'll take a look down under just to see what kind of condensation has been. Uh oh, not much we're not getting AC condensation.

There's been no AC water dripping. How about that? Okay, that's good to note. All right now, what I'm going to do is use the machine. We're going to recover all the refrigerant in the system.

Uh, the machine is going to weigh that refrigerant and tell me exactly what the charge is. Once we have it recovered and we have a known quantity of Uh of refrigerant, we can compare what we take out with the specified amount of refrigerant which I believe is on one of the stickers here. Yep, here it is Looks like our spec is one pound, 14 ounces so almost two pounds of refrigerant. So let's see what we have in the system and then uh, we'll uh, we'll go from there.

That's going to be our our path of repair for this particular uh situation. It's your turbine Cummins that was impulsive I know, look at that. There's an ECU down there against the engine block. How about that fan? Feels good.

There are no auxiliary electric fans. This condenser looks new or newish. I Wonder why it's a had a replacement before? Where's the compressor? Is that thing new? It's down below. Okay, let's go down here and take a peek at our compressing unit real quick.

see if that thing's any good or if it's been replaced. and look here. we've got the compressor has been replaced. So it appears to me that folks have been troubleshooting this situation.

and uh, now we've uh, We've unloaded the parts Cannon to a degree where my guy wants to put an evaporator in it. Yeah, I'm gonna diagnose it first I don't want to just start firing Parts at this car and it might need that evaporator and that could be uh, where we land, but we don't know that yet. So it's had a compressor. it's had a condenser.

Let's get out of here. We're all climbing around rolling in the dirt, so we've got a compressor condenser. It does not appear that anybody has changed the service valves that looks new. Oh I think I just spotted another leak.

Perhaps looking right? look in the back right here. I Know the thing's dark so it's hard to see, but there's another low side service valve on top of this accumulator flashlight. Let's see if there's dye under here. and yeah, there's plenty of it in there.

There's oil and dye on that valve and we can see some saturation right here around the stem where the oil has seeped down. So that's uh, at least two leaks that I found so far. Very interesting. Okay, how much have we recovered? Look at that We've recovered 0.63 pounds of refrigerant so far.

Very interesting. All right. The machine beeped at me and look at that point. Seven six, Seven pounds of refrigerant recovered.

So this thing was super low on refrigerant. They put some parts on it. Maybe they needed it. Maybe they didn't need it.

Not for me to judge. I'm only going to work with what I got to work with here. So what I'm going to do uh before I consider pulling dashes out and replacing evaporators is I'm gonna replace these valves and I'm going to recharge this and more importantly, I'm going to throw a bunch of dye into the unit and that UV dye. It's ultraviolet reactive and that honking that dye will tell me if and where the leak is now.

I do have uh in the back of this truck a replacement accumulator. I Suppose it couldn't hurt to change that while we're here. It's not that hard to get to and you know we've already got a new component. I might as well go ahead and slap that new accumulator in there.

So yeah, let's go do that real quick before. Uh, before we get all crazy and start pulling dashes off, that's gonna be the plan I'm gonna throw that one part in because it's easy, it's cheap, and we've already got a leaker on it Anyway, we'll change that accumulator. We'll put some dye in the system. we'll Evac we'll vacuum it down, put it into a vacuum.

We'll recharge it with the correct specified amount. Then we're going to check performance now. I'm kind of going to make a case study out of it. I'll put my one pound 14 ounces in and I will recheck it in a few days and that's going to tell us if in fact it is leaking or if it is not leaking.

If I find that it's not leaking, then I will suggest to my customer that we not remove the dash. and uh, if they still want to do that, then that's what we will do. But I would at least like to have all the pertinent information before we begin. Okay, we have here in a box a new accumulating unit.

Like I said, since we already have this part and my guy already bought it and it's here. I'll go ahead and get this thing installed because like I said, even if I end up going into the dash, I'm still going to replace this. so let's just do that right now while the system is discharged. Okay, first things first: let's pop this clip thing off of here.

become unclipped. This is really just a safety clip. This is not the actual mechanism and there's another one right back here on the other side of the line that goes into the evaporator into the dash. Let me get this guy off.

Come here. I'm gonna drop it. Come on, don't fall. Got it? Okay, now this is the fun part.

These fittings right here. Uh, inside a little disc, there's a spring and on the opposing end there's there's like a lip and that spring pops over that lip. and then that's what secures the lines together and we need a release tool to. uh, well, to release that.

Let's see. try this one. It's got to be like almost a perfect fit. So what we do, push down on the line and I gotta push up on the other line and then wiggle this tool under that spring.

Easier said than done. I Can tell you that and I should be able to pull these guys apart. It's a real big pain in the butt in the behind. Oh look, there's more oil from that valve leaking on me.

That's cool. This one's not working I need to try another tool. Okay, I've got a different style tool here. This one's a plastic unit similar in shape on the inside.

It's going to slap or clasp around slap. it's going to clasp around that little fitting and I should be able to wiggle this up behind that spring to uh to disengage the spring. Let's see if this is gonna work. Maybe Please work.

I don't I don't like these things at all. They're terrible. Ford likes him too. Let me rotate our little hose here.

Did I get it? Sure did that. Okay, that one's off. Tuck that. aside and then I've got to do the same procedure way back.

Yonder against the firewall on that other connector back there. All right. So on this first line you noticed I had to pull on it and wiggle it away and rotate it to break that surface tension and or friction. Now I won't be able to do that on this one.

So what I need to do is actually disconnect this accumulator from the firewall and that way when I get the tool behind it to release the clip I can wiggle this thing and rotate it to separate it from the line coming out of the evaporator. So what we do next is I'm gonna go in there with my 10 mil and we're going to unbolt. Looks like there's one bolt there and maybe I think two or three bolts. So we've got to pull the bolts out and then get this unit disconnected.

Try to squeeze in here with the little micro impact. that's the quarter inch. Drive I See 210 mil sockets right here or a sockets bolts 210 mil Fasteners There we go. I'll bring these guys out.

Get rid of that one. Oh that's interesting I See a piece of garden hose for the evaporator drain? or a heater hose or something. See that expensive? someone put that there. Okay, so now the unit has been unbolted.

it does kind of move. Let's get in here and disconnect. Oh, that's the wrong one. I thought that was a larger one than the first one.

It is not. The illusions of the Optics got me come here. open up a little clam shell thing, pull that back and kind of rotate it some to make sure we get under the little spring which I think I felt it come under it. Awkward.

I'm standing on a little table to reach up and over this Doge right here. Okay, it came free. Come on Tool. release the Shadows Come on Tool I Need the tool to release because now the tool is hanging onto the part there.

Got it? So what I think I can do now is just wiggle and pull. There we go and it comes free. That's what we're looking for here. Okay, coming on out, there's our old unit.

Yeah, that thing was definitely leaking out of that valve. And of course, here's our new unit. Russia So let's go ahead. get this guy positioned and uh, ready for install.

We don't need that. We don't need that now. This is a slightly different design than the other one. These have studs.

The other side had, uh had bolts I wonder you know I'm just going to unbolt these. Take these bolts out. Uh, not gonna work. Maybe that's correct and they just gave me new hardware I Don't know I was misled by my own own eyeballs.

My own misleadings led me to become the Sled Okay pop caps. Get rid of that. Oh looky yeah, now we can see the little spring inside. See it in there? That's what hangs on to the lip which is on the line side of the other components.

I Would prefer just a flange with a nut, but you know that works too. I guess Anyway, let's maneuver this little guy back down into its position. We'll plug it in at the evaporator first. What is that oil stop leak? I Don't know.

It's not really the right color though. I'm gonna wipe that out. Get rid of that. It's nasty.

Let's go ahead and plug this new accumulator into the line. so I can get it for you to propagate here. Tangled Up Massive. Uh.

HVAC Hoses I'm stuck. Oh I'm so stuck in you there now we're unstuck. Good job! Ray Slide this thing in and push it in until it clicks and then we can put the mounting screws back. Begin clicking.

Now you got to be careful with stuff like this too. If you wrench on it too hard, you'll actually break the condenser or the evaporator inside because they're not very structurally sound devices and they can very easily become damaged if mishandled. Okay, that one's in is from here. Slide that guy on, give it some twists and some.

Wiggles Looks like I'm gonna have to use my second hand clicks that clicked on. Oop, that one's not all the way seated. Could have been a fail. Oh, that sound is horrible.

Yeah one last little Hail Mary to get that thing attached I'm climbing up and over I think that was it and it was not. WTF Batman that's it and I pull and it's not coming out. Got it? Very good now. I'm gonna go in here.

throw a couple of these little bolts in, then. uh, change the surface boards next. Okay, let's Buzz these bolts down I Went in with the ratchet this time. not the impact.

tight squeezes and all. Click There we go. All right. That unit is now secured and installed.

Let's change this service valve and then the high side valve. Then we will recharge, re-evaluate the system, and then uh, we'll go from there. We'll make determinations, uh, based on how it runs and what to do with the under dash section. Oh I can't even get to the valve.

it's wrong angle on my dangle here I need a shorter one of these? Lucky for me I have multiples. You know why? Because I uh I ran out a few days ago or I lost one or I lost my last one and you guys saw that and proceeded to send me like a hundred of these things. Which is really cool. Anyway, there's a there's my small low side Schrader and over here to the large one that we know has a leak.

Yeah, let's pull this guy out next. So now it's coming out sleep. Oh it's gone I Wanted to inspect that? Really? No, it's it's in there. we're gonna find that.

I Heard It Go Tinka Tinka Tink I See it down there. It's like it's way down there here. I Will get it with the claw I have a claw device of course the little button and then the claw comes out that that will recover that which I have lost Maybe It's like the claw game from. Toy Story The claw Got it here comes.

I Wish I could have videoed that but it's too far away. See what we have here? So we've got our external o-ring That's the little green one and they're supposed to be more o-ring on the flat bottom of that little valve thing. And it appears that that also uses this little green o-ring So that's one o-ring that does two things regardless of putting a new one in it. That's what I do.

All right coming in with my new replacement Schrader valve. So here's our Oh Focus There's our old one we know was leaking. Here's our new one and I think the only real difference we're going to get out of it is going to be that little o-ring seal down there at the bottom. Stay focusing.

it's not doing it Okay, Well, that's my new one that's going in this one gone, don't need that. And here's the larger high side. So here and see what type of ceiling surface that has now this one. this design here that's actually using two O-rings Nope.

Stay focused. It's using two O-rings one for the plunger and then one for the uh, the housing. So we're gonna replace this one with this one that should help keep a seal. Drop that guy in and tighten her down like so we don't need to tighten it to the moon.

just you know, good and snug. There we go and then head over, tighten up and install the little Schrader Put that guy up in there. don't fall out, stay, stay, stay stay stay. Very good.

Again, we don't tighten it to the moon, just snug it up or more tighter. It's not always better or or IST or better or correct. Finger clicks. There we go.

Okay, that's good. Let's refetch our machine flashlight. There It is. flashlight gravity.

It wasn't even in use. Anyway, let's reconnect to the vehicle. We're gonna put this thing into a vacuum probably about 15 minutes just to make sure all of the air and moisture that entered the system has been in fact evacuated. Then I will recharge, then re-evaluate system performance.

We want to make sure it stays cold or is cold. Please get on there. There you go. Okay, that's tight and back around to the front of our machine.

Remember seven points or I'm sorry. Point Seven, six, seven pounds. That's what we recovered. We're gonna vacuum begin vacuuming now and again.

The vacuum pump in the machine is going to pull that AC system down into a vacuum of 29.9 inches vacuum because you, uh for inches Mercury you almost cannot achieve 30 inches. We'll do 15 minutes that way. We're 50 better than the industry standard and we're not in a hurry. Vacuuming has begun and we will hang out until that thing is done.

We'll install the charge and then go from there. All right, coming back over looks like we're done vacuuming. Let's go ahead and install our refrigerant charge. This is not a Poe system so that gives the X and refresher We are at one pound, 14 ounces, Again, almost two pounds.

That is 0.850 kilograms, 0.850 So We're Not Gonna Save Come in I don't want to do pounds and ounces so we'll just do this in metric kilograms Zero Zero Eight, Five, zero kilograms and I like to charge on the low side. Wait wait Doing it wrong. Actually stand wait wait wait wait. I'm gonna throw some dye in this four I charge it.

He doesn't really like to take the die. uh when the charge is full I've got to force it in past it past the line pressure here. So go ahead and take this guy. plug you in.

it will run about a half ounce in there. something like that. just kind of screw that down some and it's going to inject some liquid. It's connected and we've got liquid dye right here.

See that now. I Can go ahead, just plug this guy back in. This is why I Like to do the low side charge. Oh finger, got caught the low side charge.

If I send all the refrigerant right through here, it'll help to pick up that die and disperse it and that's the idea. So we're on the high side. Uh, how do I switch you to low side? There we go. Low side, begin.

low side charge now. beep I Don't have enough insufficient refrigerant. Oh no. Oh no, my Tank's empty.

Okay, hang on. let's close these valves. Check the tank. Yeah, that Tank's empty.

Okay I need to order another tank. Hang on. Pause Cut. Fail.

All right. I've thrown a new tank on there so we're gonna go down. It's already installed in the back. We're gonna go down to tank fill.

There's a the external tank and then there's an internal tank and the internal tank is where it draws from. Uh, when it's servicing We're Gonna Fill Let's go ahead and go. Uh um, we'll put five pounds in there the 10 pound tank. so we'll do half the tank five pounds so the valve is open down below those are closed.

That way we don't try to recover from there and it's going to go ahead and fill the internal tank from the new external tank and then, uh, then we can proceed to charge the vehicle. So a minor setback. No worries, Be right back. Okay, It beeped at me.

So we've got five pounds refrigerant in the internal tank. so we're done with this menu. Let's get out of here. Now we can go back to charge and charge the vehicle.

initializing, blah blah blah. that good stuff if you're not safe. Service records. Yup.

Okay, let's go reopen up our valves over here again. We just turn them until they kind of stop. Don't crank them down tight does not mean open. The fact that it threaded and it pushed on the valve is what means it's okay.

We had originally set that up in Metric, so we're gonna do it again in Metric. That's point. Eight Five zero kilograms and we want to charge that on our no side. Remember to die.

Do a low side 0.850 Let's just double check in. 0.850 kilograms. That is good. Begin charging now.

Purging. Begin purging. Now is purging. Finish purging.

Begin charging. Come on with it. Reading tank weight, Do not disturb. Oh forgot.

Low side. There we go. We are charging beginning. Be right back as soon as that's done.

And while it's charging, let's put our little Clips back on the lines here. They just kind of snap back in position real easy like and get the one out back, snap that guy on and we can get our goodies off of our wiper. Cow up here. Tools: Fasteners little plasticky bits, rear little plastic thing.

There we go. Okay I Heard another beep. We're good on the beef. We're gonna go ahead and hose equalize.

Uh, continue. What that's going to do is that's just going to install a pre-programmed amount of refrigerant and that's designed to displace the amount that is in the in the lines right here. You see when? Uh, when it took the refrigerant from the internal tank which has a scale on it. it knows exactly how much it sent away from the tank, but it does not.

Uh, it didn't compensate yet for how much goes in the hoses, so we're just going to add a little bit more to push what's in the hoses through and into the system that will complete the charge. There we go and that assures that we have the full amount inside of the vehicle itself. Let's get this out of here too. Over here with you for now.

Okay I Think we're probably in a position where we can start this system back up and we're gonna check system performance. Restocking is a decent engine okay. compressor came on the high side's going up. see our low side we're about 32 35 PSI That's what we want to see on the low side, not 20.

that actually could have been why it was freezing. I Want to see if this thing stop around 275 260. get a little high, not the fan. Yep, the fan is.

Fanning Still some heat here in the condenser. That means it is picking up heat from inside of the cabin. in the evaporator, that heat is being transferred into the refrigerant. It's flowing through the system and up front.

here. we're going to expect that heat to dissipate. Uh, refrigerant delivery. Another thank you sir.

Okay, let's go back. Check our pressures. Compressor just kicked off. look at that falling.

We should kick on any second. I Heard the quick compressor on pressure's going up. so now we're cycling. We're doing what we need to be doing.

Let's head inside and start to check the temperatures at Uh at our thermal meters here. Fire this up a little bit higher. Look at that. look at that.

We're 45 degrees, 44 degrees and over here. On the passenger side, we're about 60. let's switch these around and make sure they're accurate. You go in there, you go in here.

We're testing our gauges. Yeah, that was going up some passenger hot gold. Let's just run full. Heat Yep, Temp's coming up.

Temps coming up, Temps coming up. so we know the driver's side door is effective. We'll turn driver side back down. You should see that Temp drop in a moment.

Passenger side. That's 70 degrees 75. Okay, let's go ahead and switch that out to cold. We'll let the thing stabilize again and we'll see where these things land.

Let me get that door closed and this door we want to do this doors closed, Windows up ish. Now we're going to have to drive this to really get decent and accurate readings. We can get good Baseline measurements here inside, but what we really need is airflow over that condenser. Now we do have some with the fan, but when we're diagnosing essentially a troubled vehicle, we really need to put it on the road just to verify things.

Disconnect that, disconnect the mile side. Now and that is the refrigerating these lines. So what we need to do next is we cover those lines. We're going to take all that refrigerant back inside of these and put it back into the storage tank.

Otherwise, it will seep out over time and it will lose that amount of refrigerant this guy's on. I may as well put the uh, drain thing back on. Check this for condensing water when we get back. Okay, let's get the right bars out of the way and we're going to pack this thing out and go for a ride.

Let me go right there. see that thing's done. Let's go ahead and close the hood to buy air horns. Ram horns.

Leave nothing behind. See that a new through the Matrix just then. It must be upsetting the code. All right.

Ram Dojicus, be there. Where are we at? on the passenger side 45 degrees I Accept that. That's fantastic. And over here on the driver's side about 45 degrees so we're right on the money.

It's right where it should be Again, we're gonna go drive it. Make sure make sure it doesn't freeze and any of that good stuff or mad stuff Backing out the auto, checking the corner, check in the other corner I Think we're good here. Got another Jeep over there got a lot of Jeeps backing up, backing up. beep beep beep clearing all obstacles.

Good looking good back there. Hey don't get run over and cutting it hard. All right. Riding along in our diesel mobile.

temperatures are still nice and uh, well, they're cold. It's very cold. It's super duper cold. Look at that.

40 degrees I'd say that's right on the money. It's incredible how well these heat exchange systems perform when they have the necessary refrigerant to exchange the heat. That's all this is. It's a big circular liquid power heat pump, and it uses the refrigerant, the Freon, which is a brand name, not a not a compound, but it uses freon to pick up that heat from one heat exchanger in the dash and take it out to another heat exchanger up front.

The air flows over it, removes the heat, it goes in the compressor, it's pumped up, atomized through the metering device, and then it becomes cold through that atomization similar to if you, um, if you were spraying a can of spray paint. You kept spraying and spraying. and spraying. and spraying.

And then the can becomes cold. The similar effect: we're going from a change of state of matter and that also requires the change of energy. And that change of energy is where you lose heat and that's where we get the perception of cold. So anyway, that will conclude my physics and science explanation about HVAC systems Again, my customer did want me to remove the dash out of this and put uh, put an evaporator in it and change some of the blend doors.

Um, I wanted to at least diagnose it before doing such things, which is exactly what we did today. So I may actually end up doing more work on this particular node. But I do have to let my customer know where we're at and what I have found and I would also again like to case study that low refrigerant because I know it's been refilled before. So there may be a follow-up episode on this.

Doge there may not be. It's all going to depend on what the owner wants to do. That being said, this video is reaching conclusion and I'm going to go ahead and close this video out right now. I Will do such things as always by thanking each and every one of you for watching this video.

Hope you enjoyed this video. If you did enjoy this video, please feel free to let me know about that by tapping that like button down below. If you did not enjoy this video, then let me know what you did not enjoy in the comments section also down below and I Can use your constructive criticism to produce better quality videos in the future and that will end my moment of Shameless rambling and self-promotion So again and as always, thank you guys for watching and most importantly, do not forget to have yourselves a great day! See you guys later! End of air conditioning transmission? Yeah, we go. we're clear.

More Steam We need to get some uh, some throttle going, some RPM and some airflow just to make sure this thing doesn't freeze up when it's at its uh, maximum changeability as possible. So we're making dang good pull though. Look at that. That's what we're looking for I Like it.