How to Replace Lower Radiator Hose 2001-05 BMW 325Xi

What's up guys? I'm Andy from 1A Auto. In this video, I'm going to show you how to replace the lower radiator hose on this 2001 BMW 325xi. If you need this part or other parts for your vehicle, click the link in the description. Head over to 1aauto.com.

With the trunk open over on the right side or the passenger side, there should be a cover that goes right here. This vehicle doesn't have one, but you're going to want to remove that cover. The battery is located right here. First thing I'm going to do is take a 10 millimeter socket and ratchet, loosen up this nut for the negative terminal, and that's loose. Slide off the cable. Slide it out of the way. I'm going to take these push pins out right here. I'm just going going to use some side cutters. Get this center pin, pull that up, and then slide it up.

Be careful not to cut that. Get those up. Just grab this piece, slide it out. We're going to disconnect this connector right here. Just push down on that. Slide that out. There's another connector right here. I'm going to slide the wiring out first just like that. Then the connector will come out. Just slide that to the side, like that. I'm going to take a T25 and a ratchet. Take this screw out right here. I'm just going to use this trim tool from 1aauto.com. Take this push clip out. Get in there. Pull that out. All right. Now that is loose. But what we need to do is we need to take the fan off, because the fan has to come out with the shroud as one.

What we need to do to take the fan off is we need to disconnect the fan clutch from the engine side. This is attached to one of the pulleys right there. So sometimes these are somewhat difficult to get off. So what we're going to do is use this tool. We actually sell this 1aauto.com, with many different sizes. This happens to be the 32 millimeter. That's going to slide on there. And then we slide this on, and with a pneumatic air hammer we're going to give it a couple bumps and it's going to loosen up that nut and we should be able to get it off.

All right, so now I'm going to take the tool. This fan clutch happens to be on there reverse thread, so it's going to seem like you're tightening it, but you're actually loosening it. So we'll go like that. Put our air hammer on there. Make sure you wear hearing protection and eye protection. All right. So that's loose. Took a little bit of effort, but I got it. Now you can slide the tool off. Just move it a little bit. There we go. You should be able to just spin it off like that. Might need the tool once in awhile or you could use a wrench that fits, 32 millimeter wrench.

All right. Now I'm just gonna keep loosening this up. Be careful. You don't want the fan to fall. You don't want it to smash into the radiator, especially if you're going to reuse the radiator. If you're replacing it, it's not a big deal. So as I get closer to the end, I'll just move the fan and just grab the blade, and there we go. We can slide this right up. Just like that. I'm going to pull this fill cap off before we drain the coolant. Make sure the engine is cold. You don't want to take this off while the engine is hot or you're going to get splashed in the face with coolant.

Pull that off and now we can raise the vehicle and drain the coolant. Underneath the vehicle there may be a cover right here. You're going to have to remove it. There should be some fasteners there, there, there, and there. And then also back there. This vehicle doesn't have it, so we're just going to start right here. I need to loosen up this drain right here. This radiator is not the original radiator, so I believe you're going to have a different size socket to use if you have the OEM radiator. For this one, it's a 22 millimeter socket. I'm going to use an extension and a ratchet. Loosen this up. Make sure you put a drain bucket underneath.

Just going to remove this. There we go. That coolant looks nasty. To help the coolant drain out a little faster, I'm going to open this bleeder screw right here. Just use a straight blade screwdriver. Loosen this up. Disconnect this connector right here. Just push on that, slide it out. Make sure you have your drain bucket underneath, and I'm going to pop this hose off. Just use a pick, slide up on the lock, grab the hose, and try to wiggle it out. All right.

Just a little bit of coolant, not too much. Now, I'm going to take this part of the hose off right here. Just use a straight blade screwdriver or pick. Pull the retainer out. You don't have to pop this off completely. I just happened to do that. Here we go. Slide it down and slide it out. I'm just going to take this sensor out right here. There's two little clips. Slide on those and just wiggle this out. Slide it out, just like that. Here's the old part. Here's the new lower radiator hose from 1aauto.com. As you can see, the shape of the hose is same, has the same fittings for the ends on both sides. The spring clips that hold it in. Get yours at 1aauto.com and you'll be ready to rock and roll.

We're going to put this sensor back in. I'm just going to use a little bit of white lithium grease. You could put some Teflon type sealer on here if you wanted to. It's all preference or you could just put it in without. Put that in. I'll double check and make sure that doesn't leak when I'm done, I'm going to take the hose, slide it in position, and just lock it in place on the lower radiator hose right there. It'll lock in place. Take a connector, line it up, lock that in place. We can take the upper portion of the hose, slide it over here. And we'll lock it in place. So these have to go on together. Just slide this in position.

Once you get this close, you're going to want to start to tighten up the fan. Now these fan blades are the fan clutch is reverse thread, so it's almost like you're going to be loosening it. There's really no easy way to do this. Just do it carefully. Once you get it started it's a little bit easier. Make sure the fan shroud is in properly. That's good. All right. If you have the ability to torque this nut for the fan, you're going to torque that between 22 and 29 foot pounds. I don't really have that ability, so I'm just going to put this tool on there and just give it a little tap. That should be good. Right here there's a push pin that's going to go back in here. Slide that in position and lock it down.

On this side we're going to put this screw right here and I'm going to use a T25 and a electric ratchet. Tighten this down. Just snug. I'll position this wiring harness right here and we'll plug the connector in right here. Lock that in place. Then we can take the negative side, connect the negative side. Take the same 10 millimeter socket and ratchet, tighten it up. That's good. At this point, if you had that cover, you're going to want to put the cover back where it goes. When adding the coolant we're going to use a funnel, and you want to make sure you add the appropriate type of coolant. You can check your owner's manual. There is BMW specific coolant. Generally it's blue coolant. So we're going to add, we're going to fill up the reservoir.

We're going to take this bleeder screw out. Just use a straight blade screwdriver or a Phillips head. Just move that funnel. You could probably just loosen this up a little bit or you can take it all the way out. Just like that. Set it aside. You want to fill this all the way up to the top and have coolant come bubbling out of the bleeder hole. Once it's coming out of there, we're going to re-install the bleeder screw. It is plastic, so be careful. You don't want to strip this. Get this started again. Then close that bleeder screw and then you're going to adjust the level in here.

Now there is a little dipstick in here. When this is full, this is going to be all the way at the top. Now you can check it right here. It shows where the min and the max is, so you want to adjust that accordingly. You can add coolant or take out coolant. You can use like a turkey baster or some type of fluid pump to suck the fluid out. Then you want to let it run. You want to leave the heat on. When you leave the heat on, if you don't have heat, you're going to want to crack this open a little bit and just make sure you get some of the coolant out. It's probably a good idea to shut the engine off, let it cool down and readjust your coolant.

When you're done, when the fluid level is at the appropriate level, take the cap, put it back on. Make sure you monitor your temp gauge while you're running the vehicle. If you run the vehicle for about 10 minutes, the temp gauge should go right in the middle there. If it starts going to the red, shut the vehicle off and start over. Bleed the system again.

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