Koyo Aluminum Radiator Install - 3rd GEN Toyota 4runner & 1st GEN Toyota Tacoma

[@TimmyTheToolman]

09/04/23: Here's some feedback on how this Koyo aluminum radiator is performing so far. I've been running it for several weeks now, driving it in some relatively hot ambient temps, in the 90's. So far, the results look promising. I drove it up some grades, with the AC on full blast, and the engine tenps never got higher than around 194. The only thing I haven't added to the equation is having my rig loaded down with a bunch of gear adding some weight to make the engine work harder. When I finally take a trip and I'm loaded down with gear, and I'm driving in hot ambient temps, I'll report back to let you guys know if the Koyo radiator is still keeping my engine temps to a reasonable level.

[@richardstone5241]

When replacing the radiator I suggest a complete coolant flush, new cap, new thermostat and new hoses.

[@TimmyTheToolman]

@richardstone5241 I can't argue with that advice. In my case, my coolant was renewed 10k ago. My radiator hoses, thermostat, and fan clutch were replaced 35k miles ago. So, no need for me to replace the hoses and thermostat. They have a lot of life left.

[@richardstone5241]

I see, most likely good to go, just my way of doing things (overkill) ............lol@@TimmyTheToolman

[@TimmyTheToolman]

@richardstone5241 Well, you can't go wrong with overkill, unless money isn't plentiful, then it might be an issue.

[@richardstone5241]

Yes, and there is never enough money...lol@@TimmyTheToolman

[@richardsauer599]

Well Tim, I commented a while back how your videos were inspiring me to get a Toyota to work on. I went and purchased a 2001 Toyota Land Cruiser and I used your 2UZ timing belt video to change out the timing belt. I just wanted to say thank you for having a great channel. Tell Sean he is just as much responsible for the inspired purchase. Look forward to more videos!

[@TimmyTheToolman]

Thanks for sharing that Richard. That's very cool to know our channel inspired you to purchase a 100 Series Land Cruiser. You're very welcome and thanks for the compliment. Sean looks at the comments as well, so he'll see what you said. Happy Wrenching!

[@Shmity1962]

I just put in a Champion Radiator, all aluminum, in my 96 4Runner. It was a direct replacement and fit great. It came with the trans cooler. I did not remove the grill, I used swivel socket or wobble extension to remove the radiator bolts. The bolts aligned along with the fan shroud bolts. Fit great for $265 and looks the same as this one

[@TimmyTheToolman]

It might look the same, but is it equal in construction to the Koyo, I would argue it probably isn't. The early champion radiators were a poor fit. The bolt holes didn't line up well. We did an install video for the Champion radiator a few years ago. I guess Champion heard the complaints and fixed the issue. I've heard of failures with the Champion radiators, but I don't know if those were isolated incidents or a real problem with their quality. I guess time will tell. Thanks for the comment.

[@n4656bravo]

@@TimmyTheToolman another reason to avoid Champion is that they specifically say to avoid using Toyota Red/Pink coolant, as it will cause leaks and/or clogs in their rads. You would have to switch over to green to 'safely' use the Champion rad...which is a non-starter for those who want to keep Toyota Red in their trucks.

[@TimmyTheToolman]

@@n4656bravo Good point. I forgot about that. Thanks for the reminder.

[@Shmity1962]

@@TimmyTheToolman They must of fixed the alignment issues because mine fit great. I wanted an upgrade from a Denso oem replacement and this worked for me for the price. I still had the original radiator and was worried about the milkshake. I switched to green anti freeze back in the late 90’s and have not had a problem. I have 225,000 miles

[@AntonioClaudioMichael]

Look forward to a update on how well the New radiator does with vehicle fully loaded 28:11

[@fransicofuentes704]

Excellent video as alway Timmy! 👍🏽 I recently started to have overheating issues here in Florida at idle after a 20min drive. Diagnosed a bad fan clutch over heating issues went away, however, this radiator upgrade is gonna be beneficial in this heat.

[@TimmyTheToolman]

Yep, I renewed my fan clutch, so that wasn't my issue. But, Yes, a bad fan clutch can easily cause overheating issues, especially at a stop, with no air being pushed through the cooling fins. Thanks for the comment.

[@howabouthetruth2157]

That's something I didn't think about with my 3RZ rebuild ( 2000 Tacoma 4x4 ).........a new fan clutch. I did install a new OE radiator & hoses though. It's been a year since my rebuild & still running cool, but it sounds like I better go ahead & replace my fan clutch. Why wait until the inevitable happens. The old fan clutch has nearly 400k miles on it. Yikes. @@TimmyTheToolman

[@TimmyTheToolman]

@@howabouthetruth2157 Yesh, I'd definitely renew your fan clutch.

[@danielvoulkos8274]

Timmy, what are the signs of a bad clutch anyways? New owner of a clean rust free rig up here in Montana. Winterizing for the harsh witers we have. Going to swap out the radiator as a KOYO as yours. But util then can I just plug off the tranny lines into it and do the aftermarket 'thing'? Switch the radiator next spring when I have a little SSI stashed away. Lot to spend on. Do you have a recommendation for a cooler, I'm sure you have a video of which I've subscribed to 'ALL Things Timmy', just want to collect all things up. And, what do you think of a 'harfbar/trackbar replacement to get level after a 2.5in lift? Thoughts? Driving lights through the corners of the grill? 3" sq onel w harness. Seafoam into the throttle body for upper engine? And can you use one of thc two capped off port on the throtte body to hook into.. Nothing inside to monkey with should just go with it, and what are 'they' for, would you know. Winters here in Montana are quie harsh as you know so I'm setting up a pan heater for oil and one for tranny, sute won't hurt. Thank for info man. Your site is strait forward, thanks.

[@TimmyTheToolman]

@danielvoulkos8274 We have a video for testing the fan clutch. Yes, you can just cap off the trans cooler fittings on the radiator if you are going to bypass. The Hayden 699 cooler is what I recommend. I have a video for installing it. I don't understand your Trac bar question. I suppose you could use one of those capped off ports to inject the seafoam, but I've never tried it. Auxiliary lights would be good.

[@JamesTLangford]

One of the things I’ve done is running auto radiator . I now run engine Oil through the transmission port . It’s done wonders on oil life and temperature stability

[@TimmyTheToolman]

Gotcha. So you're now using the trans cooler as an oil cooler. Pretty cool.

[@JamesTLangford]

Here in Ky it helps in the winter to heat the engine faster too

[@TimmyTheToolman]

@@JamesTLangford Makes sense. Thanks for sharing.

[@howabouthetruth2157]

That's interesting. Never heard of doing this before.

[@danielvoulkos8274]

Rancher friend of mine up here in Montana always drill a 1/16th hole it all his outfits. He says it stops with any airlocks. He's a great mechanic and builds his own airplanes....I trust him all the way. I've been doing it for half a dozen years now.🤠

[@MrCalifornia1234]

I replaced my radiator with a cheap Chinese made one from eBay and I’ve never had it overheat on my 2000 tundra and I always tow my boat and I have towed a trailer over 8000 pounds with my dirtbike through the desert.

[@TimmyTheToolman]

Do you have any mods like a bumper, winch, or lighting affecting the air flow through the front of your rig?

[@kuruza9559]

Been struggling with high temps in the Arizona desert and my hundred series. I did the normal flush and fan clutch and thermostat, etc.. I was thinking about upgrading to an aluminum radiator and maybe trying to find a larger one and then doing an aftermarket transmission cooler just like you did. That actually never dawned on me so thanks for that! Also, think maybe my AC condenser might have something to do with my overheating problem, some of the aluminum fins are kind of just corroded away and it seems that, maybe having some kind of a effect. Like that condenser gets unusually hot and so the radiator right behind it suffers the consequences? Love your videos buddy thanks.

[@TimmyTheToolman]

Good luck with your 100 series. So far, I can tell the aluminum radiator is making a difference.

[@n4656bravo]

I have to believe your cooling issues are due to the airflow restrictions. My 96' is probably about the same weight: ARB front bumper with 9k winch, Budbuild full-length skids, 4xinnovations sliders, 4xinnovaitons rear plate bumper w/ full swingout, drawer system, and 33in Maxxis Razr MTs...all on stock 4.10s and standard thermostat. I monitor my temps regularly and they're always in 185-200 range, and the gauge on the dash is always below half. Even when I was in Death Valley two years ago (115F) and loaded with 3 weeks of camping gear it stayed right in that range. I'd be curious to know what your trans temperatures look like now that you bypassed the radiator. I had issues keeping the temps of my A340F in check when I was bypassed and used dual Hayden 678s...temps would always spike when I was in deep sand, towing, or pulling a long grade. I ended up ditching one of the Haydens and putting it in series with a new OEM rad.

[@TimmyTheToolman]

Yeah, sounds like we have similar mods. I do carry a lot of weight in tools, spare parts, automotive fluids, water, fuel, and camping gear. My roof rack is heavy. It's an all steel Gobi copy, and the guy that built it must have used a pretty heavy gauge for the tubing. My trans temps are good, but I'm always employing things to reduce the temp like turning overdrive off when traveling in the hills. However, turning OD off only works when you're traveling at a speed that puts you into 3rd gear, around 40-45 mph. If you're traveling slower than that, the torque converter will not lock up and it will do nothing to keep your trans temp down. When 4wheeling, I use 4Lo a lot. 4Lo will keep your trans temp down very well. But, it limits the speed you can travel. If I'm on any extended grade, I go into 4Lo. Traveling in 4Hi for any grade that goes on for a long time will send your trans temp through the roof.

[@markeverson5849]

Changing the three belts on my 96 4Runner and leaning on the radiator with my forearm and the radiator hose nipple on the top snap straight off😢 I'm old school and I don't remember junk like this in the old days when things were made out of copper radiators😊 I ordered a radiator from PartsGeek on Saturday and it was quite a job to change out the belts but your video helped me on that

[@TimmyTheToolman]

I've accidentally did the same thing on my buddy's 3rd Gen. I snapped off the reservoir nipple, but he was able to successfully glue it back on.

[@markeverson5849]

@@TimmyTheToolman this radiator has been patched up with epoxy 2 across the top and the side of the top Reservoir and the way that thing broke off and as easy as it fell apart in my hands I think it was the original radiator that scary because it could easily been a breakdown off grid or on a Highway trip far away

[@TimmyTheToolman]

@@markeverson5849 Yeah, you were due for a replacement.

[@aldomassa7473]

Excellence as always Tim and Sean….. congratulations by the way…. Strong work….. still one of the BEST channels out there. Waiting for the update on this upgrade. Thanks 😊

[@TimmyTheToolman]

Thanks for the compliment. We appreciate it! I made a pinned comment (1st comment you see) to share some preliminary results. So far, it looks very promising.

[@aldomassa7473]

@@TimmyTheToolman I thoughtr with the add ons temperature might be an issue just based on logic. But you always think things through. Hence the reason I follow this channel… one of the older no nonsense fantastic channels friend. Thanks as always.

[@TimmyTheToolman]

@@aldomassa7473 Again, I really appreciate your compliments. Thank you for being a fan of what Sean and I do. Happy Wrenching!

[@EngineeredMojo]

Koyo is a great product and always good fits in my experience

[@TimmyTheToolman]

I couldn't agree more. I like their products.

[@richardstone5241]

I used to live in Utah and worked for a business that built mild to wild off road vehicles and I love the 4Runners. Here are a couple strong suggestions based on experience. I DO NOT LIKE INSIDE THE RADIATOR TRANS COOLERS! They are a disaster waiting to happen NOT MAYBE BUT WHEN! Go external transmission cooler as soon as you can, like yesterday! And, I do not like radiators made with PLASTIC (same reason, designed to fail). Now, this might sound like overkill but I change ALL of my fluids ANNUALLY and engine oil (synthetic) every 5,000 miles! As a result, ALL of my vehicles had over 250,000 miles on them when I sold or traded them and they all ran like new.

[@TimmyTheToolman]

So here's my opinion on your comment. The trans cooler failure that causes the destruction of the automatic transmission is a more isolated problem than you would think it is frequenting Toyota forums and Toyota Facegroup groups. It gets talked about on these sites and then everyone thinks it's a ticking time bomb. It really isn't The plastic radiators are fine, but they need to be renewed as preventative maintenance, I'd say every 100k miles. If you wait too long, yes, the radiator can crack and leave you stranded. I'm a big believer in fluid maintenance also, but every 5k for all fluids is excessive in my opinion. 5k miles for engine oil and filter changes, yes, I agree with that. I do a drain and refill of the trans pan every 10k. Rear diff gets new gear oil every 10k. Front diff gets new gear oil every 30k. The transfer case gets new gear oil every 30k. Coolant gets renewed every 30k. Power Steering and Brake fluid gets replaced fairly regularly too, about every 30k.

[@richardstone5241]

I thought that is what I said, 5,000 for engine oil and all other fluids each year, that's what I meant anyways. Granted, if a person is using their 4runner like a soccer mom then none of this is necessary, just follow the owner's manual. But, if you actually use and enjoy your rig (no not rock crawling) like I do then .......@@TimmyTheToolman

[@TimmyTheToolman]

@@richardstone5241 Yeah, I misread what you said. So, it depends on how many miles you drive annually. I've never done fluid maintenance based off time, only miles driven, and what kind of miles driven. Flat freeway miles is a lot different than miles driven on mountain roads or miles driven off-roading.

[@richardstone5241]

Yep, by the way, love your channel, hands on instruction, well organized and great information!@@TimmyTheToolman

[@TimmyTheToolman]

@richardstone5241 Thanks Richard. I really appreciate it!

[@kokadjooutdoors620]

Watching this as debating if want to use a cooler. One of my transmission cooling lines let go so thinking should change radiator while replacing the line

[@TimmyTheToolman]

You could go with an OEM replacement, but I'm liking this Koyo radiator and using an external trans cooler.

[@kokadjooutdoors620]

@@TimmyTheToolman been on the fence about which way to go. Don’t tow a lot but sometimes a trailer with atv or boat.

[@ryansrenovations1114]

I just purchased this radiator and the iconic trans cooler with the bracket How do I run the eternal trans cooler both hoses to the transmission cooler cuz the radiator doesn’t have any hookups.

[@TimmyTheToolman]

Watch this video: kzbin.info/www/bejne/aWXan5mnbZqSp80si=VNOJMuaMPCVjH-tF

[@PhoRunner]

What were the temps you were seeing when it was climbing/overheating?

[@TimmyTheToolman]

I was getting into the low 210's. That's when the AC went off and the heat went on. Not fun. The temp would have kept climbing if I didn't do something about it. I try to never go over 215 if I can help it. I did have that big Auxbeam light bar on the front bumper that I since removed because it was contributing to blocking air flow to the radiator. But, I did experience some overheating also before the Auxbeam lights were installed. I was traveling back from Las Vegas with my wife and mom and a decent amount of gear in the back. The ambient temps were 110-115. Crazy hot. There was carnage all over the place with vehicles pulled off the side of the highway that I assumed were overheating issues. I don't know if you read my pinned comment yet, but the preliminary results look very good. I drove some hills in 90's temps, with the AC on full blast and I never saw any higher than 194. Before I call this Koyorad Aluminum Radiator the best thing since sliced bread, I need to weight my rig down with similar weight I carry on trips and see how it does. I guess I don't have to wait for an actual trip to do this though. When some hot temps return to my area, I'm going to throw in the usual everything but the kitchen sink I take with me on trips and hit some hills and see what my engine temps look like.

[@cmart9240]

I'm honestly surprised you don't have electric fans yet. Probably do a lot to help keep engine cool, probably spin at faster rpms than the fan clutch.

[@TimmyTheToolman]

It might be an option I pursue in the future. Some customization would be required in regards to a fan shroud to mount the fan(s)

[@AntonioClaudioMichael]

Nice looking Radiator 3:55 @Timmy the Toolman

[@TimmyTheToolman]

It's well-built Antonio and it's a direct fit. Koyorad makes a nice radiator.

[@mbraylarak]

I have a similar loadout on my 2k 4Runner. Have a full (aluminum) roof rack with clamshell roof top tent, water+gas cans and cargo box on top. Drawer system in rear with lots of gear. Steel front bumper with winch. Been running stock radiator and have not experienced any over heating. With that said, I only have the stock temp gauge to reference. Temp needle has always maxed just below half way up. So I guess a question I have is how accurate is the stock temp gauge? Is it a good reference for engine temp of should I install an aftermarket temp gauge?

[@TimmyTheToolman]

The stock analog temp gauge is a very poor indicator of how hot your engine is getting. Once that needs starts to rise, you've already severely overheated your engine.

[@stco2426]

Hello Timmy. Good work. I’m keen on cooling and itis not that hot here. I had to renew the OEM (brass and copper) radiator on my Toyota but I was finding it difficult to find a replacement so I got it re-cored. The re-core company that does cars and vans but also industrial and plant machinery, suggested they could fit a 3-layer core to the original tanks and said like-for-like more cores equals more cooling even though a thicker core area does restrict a little airflow. So far so good. I’m with you for having a separate cooler if you have an auto but I have a manual. Dumping heat from the gearbox into the radiator that is already struggling is not great, I think. By the way Toyota do a 10-blade fan, which I think is the same (400mm) diameter as the standard 7-blade type. I think it might rob a bit more power but should pull more air. I note you’ve fitted a lower temp thermostat, but there are variations in the fan clutches, too, or so I’m told. I’ve not figured these out but different models seem to have different slip and lock characteristics. I like the burping funnel. Interesting to see the clips on the fan shroud, I might have had these but I think mine are poor. Will get some new ones as I think the shroud does an important job. Thanks for sharing!

[@TimmyTheToolman]

The Koyo aluminum radiator is a 3 core radiator. I didn't know companies could rebuild the OEM radiator and make it better. Interesting. I've never heard of a fan upgrade with more fins. I will need to research that. Yeah, I've heard of changing the viscosity of the fluid in the fan clutch to change its lockup characteristics. I know there's companies that make them for land cruisers. That would be a cool video to make. Thanks for the comment. I really appreciate it!

[@stco2426]

@@TimmyTheToolman The radiator you fitted looked great. Here there’s not so many aftermarket parts available and my re-core cost less than a new OEM one that would have been aluminium with plastic endcaps, which I’m not that impressed with. The 10 blade fan is part ‘16361-54131’. Look it up in your parts search sites. From Japan it’s £75 but ~£40 more locally. I think it’s also known as ‘AISIN FNT-020’. I’ve not heard it’s 'better' but maybe you can ask your buddies if anyone uses one and why? More blades must be for something, no? I don’t know what makes different fan clutches suitable for different engines, but I did some digging on AISIN’s site and there seems to be differences, but sadly no graphs. I’ve only seen a single type of fluid-refill so there might be internal differences or to the bi-metallic strip? Stay cool!!

[@TimmyTheToolman]

@@stco2426 Awesome! Thanks for sharing all that.

[@AntonioClaudioMichael]

That radiator fits nice 20:13

[@aaronscott2278]

Great video !! I got a tip from a race car friend drill a small hole in the thermostat that way there’s always water flowing ever since I started that never had a issue but not speaking from very high temp states or loaded beyond stock excited for this video

[@TimmyTheToolman]

The OEM thermostats have the jiggle valve, which lets coolant pass through. I don't know how drilling a hole would make any difference. Once the thermostat opens, it's open, letting coolant flow.

[@aaronscott2278]

@@TimmyTheToolman ya it does I always put the hole upright mine was getting little hot even with new thermostat tell I was told the drill trick but I’m also all stock besides just a winch bumper I see how it could help like a big block or something in that nature but once I have hot weather going to load it up and give it a shot the alum upgrade is definitely a big thought of mine

[@TimmyTheToolman]

@@aaronscott2278 Good to know this trick. I might try it the next time I renew my coolant.

[@safeteyvalve]

Enjoy content. Have. ‘95 t-100 and far fewer content providers on this model, but you seem to have most of the important things covered- or I can easily follow with slight modifications. I’ve got to do timing belt/water pump/crank seal/pulley replacement soon (this summer?) and use your content due to never done this before. Thanks!

[@TimmyTheToolman]

It's great to know you appreciate the content we offer on our channel. Thanks for taking the time to comment. Good luck with the timing belt job.

[@safeteyvalve]

@@TimmyTheToolman any tips /tools recommend for removing crank seal?

[@TimmyTheToolman]

@@safeteyvalve We show the tools we used for the removal and insertion of the crank seal in the video. They are linked in the video description. Be sure to watch Part 2 as well and read the comments we pinned (1st Comment you See).

[@transformer889]

Tim, I have a 3rd Gen 4runner with a manual transmission, is the radiator for manual tranny and Automatic different? thank you for the great step-by-step posts

[@TimmyTheToolman]

Koyo only makes an aluminum radiator for manual transmissions. That's why I had to use an external cooler for my automatic transmission fluid because there is no transmission cooler in the bottom of the Koyo radiator. So, this Koyo radiator will work perfect for your manual transmission 3rd Gen.

[@AntonioClaudioMichael]

My 97 Ltd overheats with no bumpers but had Under armor and 40s so this would definitely benefit my main offroader thanks for sharing 10:10 @Timmy The Toolman

[@TimmyTheToolman]

Have your replaced the fan clutch yet?

[@AntonioClaudioMichael]

​@@TimmyTheToolmanyep its not the fan clutch I belive it's Because of the extra drive train weight from the 40s and How hard I have run it At Moab I need a better radiator and cooling setup for it

[@TimmyTheToolman]

@@AntonioClaudioMichael Gotcha

[@Bsavage.4r]

Hi Tim my 97 3g4r is having a issue with the passenger rear window goes down only on the rear passenger door. It only goes down not up on the rear switch but no up or down for the master switch. Is my window motor or window control module the issue thank you Tim 🙏

[@TimmyTheToolman]

So it only goes down, and you can't operate the door switch or master switch to get it to go up?

[@Bsavage.4r]

@@TimmyTheToolman that’s correct I check the chassis to passenger rear door loom for ripped wires nothing out of the ordinary

[@TimmyTheToolman]

My guess is the actual switch/button on that passenger side has a short. Try swapping that switch from the door on the other side to determine if it’s the switch itself. - Sean

[@Bsavage.4r]

@@TimmyTheToolman lesss go thank you Sean for replying so fast. I use that door as a chemical rack for mobile detailing. Something dropped and ruined the switch causing the master switch to not work. I took the one from the other side to test and it works as should thank you OG 🙏

[@awl1253]

Hey Tim, great vid as always - is this for manual transmissions only? Or is that why it’s necessary to install an external transmission with this one - in the case of an auto trans?

[@TimmyTheToolman]

The radiator was made for manual transmission models only. If you want to use it with an auto transmission model, you have to install a stand-alone trans cooler like i did.

[@awl1253]

Got it, thanks a lot! I confirmed the same on a few of the websites selling the radiator@@TimmyTheToolman

[@saltymethods2637]

Could this radiator upgrade/install for a 3.4L Toyota T100 4x4?

[@TimmyTheToolman]

I did a quick search and it doesn't look like they make one for the T100.

[@saltymethods2637]

@@TimmyTheToolman Thanks!

[@isaiahmoya9742]

Was wondering why you chose this aluminum radiator over the CSF radiator…

[@TimmyTheToolman]

The Champion had fitment issues in the past. Maybe they addressed them by now. Koyo has a good name in the industry and I felt more confident buying from them. Also, Koyo is an OEM Parts Manufacturer for Toyota.

[@isaiahmoya9742]

Very good to see you doing your homework on these matters

[@miguel2592]

Is it true that aluminum radiator require special coolants to avoid corrosion/ chemical reactions on the aluminum?

[@TimmyTheToolman]

I know the Champion Radiator company suggests using green coolant as opposed to Toyota Red. I went ahead and used Toyota Red Coolant with this Koyorad radiator. I saw no disclaimer about having to use a certain coolant. The heads on these rigs are aluminum, so using a special coolant due to an aluminum radiator doesn't make much sense to me.

[@Andres-if8gd]

Just a thought would a electric fan work better then the stock fan ?

[@richardstone5241]

I like electric fans because I can turn them off with a switch in the cab. Comes in handy when doing water crossings.

[@TimmyTheToolman]

Good question and I don't know the answer. The stock fan clutch does a pretty good job. For an electric fan setup, you'd probably need to dual fans with a custom shroud to house them.

[@SethMethCS]

Hello, I want to add my comment,. I was at the meet on Mustang St. in June.

[@TimmyTheToolman]

Cool. Did you have fun at the party?

[@andyg5004]

I doubt it’s your roof rack the air flow to the radiator definitely restricted. Not sure if there is room for an electric cooling far

[@TimmyTheToolman]

I tend to agree it's more of an air flow issue than a weight issue. I could fit a electric pusher fan to blow air in from the front, but it seems that won't be necessary. I think this Koyorad radiator might be the answer I've been looking for. So far, my temps have been really good running it in hot temps. I just need to load it down with some weight during the next heat wave and hit some hills to see how my rig does.

[@Ahyoumad]

Is this one slightly shorter than the oem one since it doesn’t have the trans cooler?

[@TimmyTheToolman]

It's pretty much the same size as OEM.

[@erniekropf665]

How many gallons will I need to do a full flush and refill with this radiator?

[@TimmyTheToolman]

A little more than 2 gallons.

[@erniekropf665]

@@TimmyTheToolman, thank very much. 😊

[@TimmyTheToolman]

@@erniekropf665 You're welcome.

[@TimmyTheToolman]

@@erniekropf665 You're very welcome.

[@CoolFrijolez]

Only reason I didn’t choose Koyorad was due to it being made in china or Indonesia but im sure they are up to the Koyorads designers standards.

[@TimmyTheToolman]

Lots of parts are made in those countries and Mexico too. The OEM radiators the last time I checked are made in Taiwan. I would have considered the Champion aluminum radiator, but due to previous complaints of fitment issues, I chose not to go that route.

[@AntonioClaudioMichael]

Oh sweet this dont have a transmission cooler on it 5:00 I could use one of these radiators for my wifes 2000 I bypassed the transmission cooler on her radiator with a Huge external hayden Cooler haven't had any issues with stock radiator but my wife don't have very many offroad goodies like I do @Timmy The Toolman

[@TimmyTheToolman]

Yep, the caveat for this mod is running a stand-alone trans cooler if you have an automatic trans.

[@n4656bravo]

Which Hayden did you use? When I first got my 96' I did a full bypass with dual Hayden 678s...I ended up with spikes in trans temps when pulling a grade, in deep sand, and when towing. I'd like to fully bypass, but loathe the idea of having to run a thermostatically controlled electric fan setup on the trans coolers.

[@TimmyTheToolman]

@@n4656bravo I'm using a Hayden 699. I also employ tricks like turning overdrive off and using 4Lo when doing slow 4wheeling to keep the trans temp down.

[@AntonioClaudioMichael]

@@n4656bravo I have a Hayden 689 installed for my Transmission cooler and a 689 installed for my Power steering As a cooler also I also installed a Electric Fans from the start that would cool them bith because I'm running massive tires on mine my wifes runs just a 689 for both Transmission and Powersteering without fans but she dosent have offroad bumpers just full skids she drives hers more for work and mine is more for Competition and play

[@AntonioClaudioMichael]

@@n4656bravo I'm running a IN line thermostatic switch you can make a double barbed fitting with a manifold and thread the switch into the manifold and then run the power and ground I like thst setup better the probing through the cooler

[@thomasjefferson3552]

i also have a 98 4 runner limited automatic with 145k. im getting around 11mpg and running my truck stock. can replacing radiator improve my mpg?

[@TimmyTheToolman]

The radiator would have nothing to do with mpg. Sounds like you need a tune-up. 11 mpg is pretty bad for a stock rig.

[@thomasjefferson3552]

@@TimmyTheToolman 10-4, will ask my mech next time she's in the shop for oil change to possibly do a tune up for better mpg. You dont have any videos on 4 runner tune ups by chance do you? I enjoy how thorough you are in your process. Thanks again, god bless

[@TimmyTheToolman]

@@thomasjefferson3552 Things to do for a tune-up are pretty much covered in our valve cover gasket video. You'd want to replace your spark plugs and maybe your spark plug wires. You'd want to clean out your throttle body and clean you Mass Air Flow Sensor (MAF).

[@kilogolfmike8095]

Is it better than oem replacement radiator?

[@TimmyTheToolman]

Well, that's the reason I bought it because it's supposedly an improvement over the OEM design. How much of a percentage better, I don't know. My coolant temps are looking better running this radiator.

[@williamtsol636]

Is that radiator a lot heavier than the original ?

[@TimmyTheToolman]

Not really. It's made out of aluminum so it's pretty lite.

[@mtnshooter2487]

99 tacoma xtra cab

[@williamtsol636]

👍

[@ToyodaMaster-tq6ht]

Do ya really need to carry around heavy skid plates if you’re just driving around on paved roads? I removed the skids from my truck long ago. Carrying unnecessary weight around kills your fuel mileage.

[@TimmyTheToolman]

No, you don't, but you should put your OEM skid plates back on. I'm pretty sure you have encountered debris on the roadways before. The skid plates protect things like your oil pan from getting punctured.

[@andyg5004]

Wasn’t the old radiator the original one that came on the vehicle. Your front is like a computer with excess bloatware

[@TimmyTheToolman]

The radiator I pulled out was a replacement I bought from Toyota. The quality isn't the same as the original. I have a lot of accessory wiring for the aftermarket lights, winch, and front E-Locker. I also have hoses running to the front for my external trans cooler. So yeah, it looks pretty busy up front, but everything has a purpose.

[@phillipblount5541]

SIC

[@TimmyTheToolman]

Indeed!

[@michael184272]

Koyo wheel bearings..

[@TimmyTheToolman]

Yes, Koyo makes wheel bearings. But, what does it have to do with the subject matter of this video?