- Well, our BMW rally car is
starting to look pretty cool. (car engine revving) So today, it's time to make sure that the engine temperatures stay as cool as the car looks if that makes sense. We're going to get rid of a lot of this plastic stuff with some metal bits like these. We're going to be replacing
the stock radiator and a bunch of other components with nice aftermarket metal bits that aren't going to give up on me in the desert. I'm Zach and this is Money Pit. Let's get wrenching. (power drilling) (spunky music playing) Big fat thank you to eBay Motors for sponsoring today's video. Look, I know there's a butt load of options out there when it comes to buying a car. But how many can you really trust? I mean, who out there guarantees that the less than 10-year-old vehicle you
bought online is the same one that shows up with a
vehicle protection program. As if someone out there utilizes
a proprietary web feature called fitment that
guarantees any part you buy is the right part for your car. Ha! That'll be the day. (indistinct chatter) Huh? What? eBay Motors does that? What is this? Well I'll be. I stand corrected. eBay Motors already
does all that and more. So shop for cars and parts with confidence by going to the link in
the description below. Now let's get back to Money Pit. (explosion) (whimsical music playing) As you may or may not be aware, we recently bought a stock BMW E36 and it didn't stay stock for long. We've been modifying it to become our own kind of budget-minded, DIY, off-road, rally, project car. Now of course, you can
drive a stock car off-road to some success but that's
not what we're doing here. We're modifying this thing with a bunch of rally inspired mods. And along the way we'll see if those mods are worth all the time, effort, and money they take to complete. So cooling system on a car
is a pretty simple thing. It basically sends a bunch of fluid through your engine to absorb all the heat that your engine is making. Then it sends it to the radiator to get rid of all that heat. And then it just keeps doing that and doing that forever so that your engine stays running. Now we've gone pretty in-depth with cooling stuff in
the past on Money Pit. If you want to learn more, check out the link right here. So the cooling system
we've got here is okay in terms of overall design. It works for the car especially
at stock power levels. The only problem really comes from some of the materials that things are made of. There's a lot of plastic
in this engine bay and in this cooling system specifically and that plastic is known to get brittle and give up, crack, start leaking, let go altogether. So, our job today is really just to replace a lot of the failure prone plastic pieces with metal bits that
aren't gonna come apart. So let's go take a look
at our new metal bits. Okay, so here we've got our radiator. It's made by Mishimoto. A lot of stuff's made by Mishimoto. This is a full aluminum radiator and it replaces plastic end
tanks with aluminum ones. Then we've got our expansion tank, this stock form all plastic. This one, all aluminum, baby. So that's cool. Then we've got a sick little fan setup and by little I mean big. That is one large fan. We've got some new hoses and this thermostat housing. This is plastic from the factory. That's ridiculous. This one's metal. And then we've got a water pump. We're going to replace the water pump while we're doing this stuff too. And then we've of course
got a new thermostat. So with all this stuff combined, we should have a pretty
bulletproof cooling system that can take all of
the abuse in the desert. The first time we went out to the desert, cooling system was fine but by the time we made it home, we had developed a leak from one of the end tanks on the radiator. It's that plastic stuff. Got to get rid of it. In terms of time that
this is going to take, I'm figuring, we gotta get down there with a water pump. Six hours? Six to eight hours? I mean it's always tough
to really get a guess when you're filming too. - [Camera Man] Come down a touch. A little bit more. Okay, that's good. Now (beep) him up. - Benefit of the doubt. We'll go eight hours total, start to finish, get all this stuff done. We're also gonna have to bleed the system but I got a nice little
tool for that somewhere. And difficulty level, lowish, low-ish, you know, mostly low. You know the first step
to any of these dances is to take out the old stock stuff. So, God dang it. Let's take out some stock stuff. Jack this b-word up. - [Felipe] Yeah. - Cool. - [Felipe] Hit the road, Jack. - For now we're just going to break my back, Zach. Well, you know you gotta get
a full body workout fellas. These are all different exercises. This is my trilateral pull-down. Right, the first thing
we're going to take out is the airbox, get a little room here. Look how much more we can see. - [Felipe] ♪ I can see clearly now... ♪ - ♪ This airbox is gone. ♪ Alternator cooling pipe, fat hole in it, put a little tape on that. She's got a second mouth so we'll tape that up. Who knows? Take off all these Phillips head screws with this flat head. - [Felipe] No. - You are about to be wrecked. Well Felipe, you owe me dinner. - [Felipe] Every time I owe you dinner you get to pick a 2 star
restaurant from Yelp. - Yo, that sounds kind of fun. I don't think I've seen
a 2 star restaurant in a long time. That would be an experience. What are you doing? Tugging my fan. - [Felipe] When you can hear that sound. - Oh look, look, keep doing that. - [Felipe] Oh wow. - We found the leak. I was like I shouldn't be hearing them super squishy noises like that. - [Felipe] Well there you go, now you know that it's
absolutely worth it. - Well you guys can leave now - [Felipe] Yeah. - We've already found out. - [Felipe] You can clock
out, go to the next one. - Yep, this one's worth it. - [Felipe] What came out wheelhouse? - See you guys next week. - [Camera Man] ] What came out wheelhouse, not even sure. (men laughing) - A part of this whole process
is going to be replacing all the coolant so I'm going to drain it from the radiator but I'm also going to try to get to the block
drain plug for the coolant and get all the old
coolant out of the engine. So that in addition to
all our new metal parts, we also have a fresh new batch of coolant in the whole thing. Okay, no spill, no spill,
not a single drop spilled. Sure enough. Okay, we'll just let that make pee sounds for a while and then she'll be empty. - [Felipe] This is now an ASMR video. - Check out my desert souvenirs. Some large rocks. The Toyota fog light bezel. That didn't start out in here. (hip music playing) All right, so I've located the drain plug that's going to let
the rest of the coolant out of the block. Now all I got to do is loosen it. See if we can avoid making a
bigger mess than we need to. And sometimes you just can't
avoid that kind of stuff. So, have paper towels ready, buckets, you know, try to
catch as much as you can, but also be ready for a mess. Like AKA get your hat out of the way. I'll do my best. Well that sucks. I mean, ridiculous. I mean, it's just dumping
straight onto the manifold so it's just going every direction. (men laughing) All right, so it's about time to pull off our fan which means we need some tools. I got a fan clutch wrench here. It's just a big skinny wrench. And then this will be used to hold the water pump pulley in place which is what the fan's connected to. So if I tried to loosen
the fan without this, I would just spin the water pump. So I can hold onto one
of the heads of the bolts with this hole here, and then just kind of leverage it against the pulley and I can connect my ratchet to that. And then basically I'll be
twisting against my two tools. There we go. Come on, give up your secrets. There it is. And then the radiator comes out. (drum music playing) And there she is with them plastic tanks. Ah, man. - [Felipe] I just mopped the damn floor. - All right, so now we need to get down to our water pump so we're going to take our serpentine belt off by loosening this here tensioner and removing the belt. Now the difference between a belt that looks good and healthy and a belt that doesn't look good and healthy, well, you kind of want
to look at the ribs here and look for cracks. This one has no cracks whatsoever. This thing really does look pretty fresh. So I don't even feel bad about
forgetting to order belts. So the problem often with removing pulleys especially a water pump pulley, is that the whole pulley
spins when you try to loosen the nut or bolt. So an easy thing you can
do is just wrap your old or your current belt around it and just grab both sides of it to take good hold of the pulley. And then, there you go. You can loosen your hardware and get your pulley off and get down to your water pump. I'm going to pop this little
water pump out of here. Owwwww! It is an old plastic pump. This is probably the
original pump to the car. So that's plastic, which, you know, I'd prefer metal and we do have a bunch of corrosion. So now I'm going to spend
a little time cleaning up the bore before we put
in our new water pump. I'm also going to take off this
plastic thermostat housing, replace it with a metal one that we've got over there. Oooh, a little bit gunky
and our thermostat, a little bit stuck. (hip-hop music playing) Okay, the new thermostat's in. The thermostat housing is in place so now I'm just going to lube up my new big fat O-ring on my new water pump. And then we'll put the water pump in. (laid back music playing) Put it back on the way it came off. Just kind of snake it through, ribs to ribs, back-up belt to tensioner, ribs to ribs, and always butts to nuts, especially on long bike rides. Okay, now that we've got
our pulley and belt back on, well, I reckon it's about time to start stuffing that new radiator in here. All right fleabag, guess
I'll put the fan on the frickin' radiator out here. - [Felipe] Tell me, tell
me is there an option? Do you have to do it now? - No, you can do it either way, but heck, you know, I suppose it'd be nice
to have it on there. I'm going to... Hmm, I don't know which way it goes. Yeah man, I guess it's gotta be like that. I mean that doesn't line up the best. Also, can't really be too sure what these are for. Well, what the heck do you want me to do with this kind of shh... So I'm just gonna take a file to the weld that's basically what's
holding up this fan shroud. File back just enough. And then it should fit, just barely, just barely. Okay, so we've got the
radiator and the fan and the expansion tank
put together finally. So we can drop this whole
assembly in and move forward. One other slight bit of bad news. This is the coolant level sensor. It goes in the bottom
of the expansion tank. I broke it, broke the plastic. What do you know? But I've got another one on order. Hopefully, it'll be here tomorrow. Maybe not, but them's the breaks. This is going to take a little
bit longer because of that. I wouldn't call it wildly
confidence-inspiring. Hmm...am I forgetting a piece? Is there a rubber thing to transfer over? That's not the radiator. Heyy, would ya look at that? Who knew, you know? Oohh baby, not a bad looking setup. Okay, we've got some hoses to put on and then we got some wiring to do. And then we got to wait
on that level sensor. So I guess since it's
not getting done today, we might as well call it for the night. It's pretty late. We'll resume in the morning. (catchy music playing) And our replacement coolant
level sensor has arrived which is great so we
can get this installed. And then the other thing
I was waiting on is this and this is a little splicing unit with 1/8 inch 27 NPT port. And that is for my temp
sensor for my fan control. So this goes in here and
when the coolant gets to a certain temperature, the fan will turn on. And I can adjust that temperature with the relay box that comes
with the fan control kit. So we just got a few things to do, put in our new level sensor,
our temperature probe, do a little bit of wiring. Fill the thing with fluid and that's it. Let's do it. I'm just going to cut this hose. I'm going to cut basically this section in between the two pieces of tape out. And it's going to be replaced by the thickness of this port. Now, I've got this on
the outlet of the head. So I've got this right on the
other side of the thermostat. So basically as soon
as the thermostat opens and the hottest coolant we
have in the engine comes through it, that's what will be picked up by the temp sensor. Just got to make a
couple razor blade cuts. Nice. You never know. You never really know. Okay, let's see if we put
this in the right spot. - [Felipe] ♪ You put the
lime in the coconut. ♪ - ♪ You drink 'em both up. ♪ Okay, beautiful. And then our sensor can
stick out right next to the expansion tank. We can run the right
wires right behind it. Oh boy. I don't need to do anything to the other hose so that's cool. So now the hose's on and our little probe inlet ready to go. I'm going to put my probe in it. So I'm just going to put a little bit of high performance thread sealant on it and then tighten it down nice and snug. Okay. So now this is ready. So now we've just got
to get power and ground and key on 12 volt to our
relay box via this wiring. I'm just going through the
process of getting these wires to where they need to go. So this is going to be a chassis ground so probably down here. This is going to come over to the fan so it'd probably need
to be lengthened a bit. Come back through here over to the fan ignition source something and then override which is optional. And I'll probably leave it optioned out of if you know what I mean. (hip music playing) Okay. So we've got all our wiring complete and the cooling system is all installed. So now it's time to finally
fill it with some coolant. So to do that, I've got
a cool little tool here that helps you put coolant
into a cooling system without trapping any air pockets in there. So how this works is kind of cool. I put shop-air onto this
connector right here and it just blows air
through this black body here. And there's a little venturion here and as air blows across it, it creates a vacuum and it sucks a vacuum on my whole cooling system through here. And once I suck that vacuum, then I can open the valve that sucks coolant in. It'll also let you know whether or not you've got a cooling system leak before you put fluid in it. It won't pull full vacuum or at least it won't hold vacuum if there's a leak. All right, so we've drawn 24 inches of mercury vacuum on the system and as long as that holds steady for about 20 second then
we know we have no leaks and we can start sucking up some coolant. And then as this gauge
comes back down to zero, we know that we've filled up. Now, I got to make sure
I don't suck up any air or else I gotta do it all over again. Aahh! I sucked up air! I don't think any of it got there. Really not that big of a deal. All I got to do is hook shop-air back up, suck a little vacuum, do this again. Not a big deal. Safety, safety, safety first, second, and third folks. Our cooling system should
now be full of coolant so I'm going to pop off our tool here and then I'm gonna start the car. I'm still gonna run it with the radiator cap off and the bleeder open just to make sure there's no air bubbles. And I'll let it come up to temp and we'll fiddle with the fan. See what temperature turns on it and change it if we want to. Expecting no issues. Ohh, critical hit. All right, I see no reason
this thing shouldn't start. (engine revving) What the hell? Ohh, oh, oh. Oh, oh, oh, oh. Some butthole took the O2 sensor out to get the coolant drain plug out and didn't put it back in. That adds up. One more time. (engine revving) Okay, we're going let this
thing come up to temperature. We'll see at what
temperature the fans turn on. I'll just be temp gunning
the thermostat housing here. Oh, I'm also going to crank
the heat on inside the car, make sure that coolant is
flowing through the heater core. Make sure there's no bubbles in there. So we've just reached the
operating temperature. The thermostat just opened. So we're running at about 165 right now and that's about where
I want it to turn on just after the thermostat's open. So now I need my screwdriver. And so I'm just going to
adjust this temperature control until the fan turns on. And there she goes. So now the fan will turn
on to that temp every time and we should be good to go. I think that's a cooling system installed. Let's get it on the ground and take it for a drive. So I'm just gonna kind of drive around, put some heat into this thing, make sure the engine doesn't overheat, make sure we don't spring any leaks, and just kinda, you know, pay attention to the car overall and make sure that it's
ready to go testing again because it's about time
to go back to the desert. Ohh yeah. Feels pretty good. Feels pretty good and our temps look good. So I'm going to call this
a successful shakedown but it's only about 75 degrees here. So the real test is going to be, you know, 100 degrees in the desert
and absolute, you know, throttle smashing. So we'll see how it
handles that next week. I'm just gonna keep driving around, shake this thing down, and make sure she's good to go. I'm gonna look cool doing it. So I hope you guys enjoyed this episode. I hope you learned a thing or two and if you did make sure you go follow me on Instagram at zachjobe and follow donut at Donut media. And I'll see you guys next Wednesday. (hip music playing)
我在想用重水的话汽车散热会不会提升超级大，可是怎么搞重水