The world needs more people like you, thank you so much! I did my Chevy 2500 and it’s holding! Way better than $400 new Radiator! Again, thank you my good sir!

Had a crack about 4" long in the plastic tank on the "outlet" side of of my 2002 F-150 radiator. I followed your tutorial pretty much exactly as you did in your video. Using plastic taken from the "ribs" of the tank in question, I was able to successfully patch the leak. That was 6 day's and appx. 1100 miles ago. (I travel A LOT for work...bought my truck brand new in 2002 and it has 447,212 miles on it currently). Thanks for the video Jennies! one note of emphasis...make sure to drill holes at ends of each crack to arrest the "run" of the split.

you gotta heat the radiator with the iron first and when it starts to melt you add the plastic. Just like welding with a rod. It does totally work. Did it on a 97 5.7 vortec. Lasted about 18 months so far 👍🏻💪🏼

This is, by far, the most simplistic (albeit only) youtube video I have watched on this kind of fix, and I am super impressed with the results. Plus, you explain things just like I imagine I would, so kudos for that.....!

I had the same problem with a crack in the top of the radiator in my Celica GT-Four. I fixed it almost the same way you did, but I did use a Dremel with a diamond engraving bit to cut a V shape groove into the crack. Then got my cousin to heat it with a hot air gun while I melted in more plastic with a soldering iron. Then sanded it down flat and 3 coats of epoxy resin. It lasted 6 months before it split open again in a huge cloud of steam. It's now been replaced with a full stainless steel radiator. But at least I had 6 months to save up for the replacement. So DIY repairs are handy to keep it working until you can get the cash together for a replacement part.

I was just contemplating doing this on my 08 Dodge Grand Nemesis. The fact that you were able to get that radiator to hold pressure at all is truly motivating. Cheers!

I did this repair on my own vehicle after watching this and it worked amazing, thank you!

Not only a great radiator repair video, but also a human mind in action. Love mission impossible projects too!

Add more filler to the weld and strands of steel wool as structural fibers. I have heard zip ties are the right type of plastic to use as filler. PA plastic. Great work and well explained.

And boy oh boy are you a great instructionalist! Great step by step and I'm glad you left a lot of the melt and weld to the video, very important to see how you got the new to the old plastic.

I know it's been awhile since you made this but I'm so glad you did. Very helpful. Thank you.

I fixed a 3' dia plastic tube that snapped into two pieces with a clean break with your baking soda trick and a trick I have used. Regular SuperG is thin so use a piece of sting and tack glue it around the crack. Now saturate the sting with super glue and use the baking soda. Boom a fix that looks like a small weld. Painted mine and looks darn good!

Use Loctite Epoxy Weld compound and a piece of automotive body repair fiberglass cloth. DON'T USE JB WELD. JB Weld is not antifreeze resistant. Rough sand the area to be patched, then clean with brake cleaner. Soak the cloth in Loctite Epoxy Weld, smear some Loctite on the radiator then apply the Loctite soaked fiberglass. It will be a lasting repair. This repair works well for cracked steel and aluminum on engines and transmissions also.

Thought about doing this on my leaky Jeep, and located all the items I thought I might need except for the "donor" material. Then I checked KZfaq to see if anyone else had attempted this... this is the first video I found. Seems I was spot on. I'll try this week.

4 years later - "After a while I started to see a little moisture at the repair, but never enough to add water. Ant it was still holding as of a couple months ago when I sold the truck." - Jennies Garage i scoured the comments so you don't have to!

So far the most perfect video on this topic 👌

Covering the area with a piece of window screen and pushing the melted plastic through it makes it way more secure.

I would try a $16.99 plastic soldering iron from Harbor Freight to seal the area by melting the radiator well plastic to seal the area. Now that it's sealed and we're no longer worrying about coolant leaking, you can add JB Weld over the area to strengthen it mechanically to help the area hold against the 15 lbs. pressure of running at temp. Everyone seems to be trying to use 1/2 of this solution, one or the other, but I think both together would be best since it seals the area, as well as strengthens the area...

After doing the plastic weld,I would've got epoxy that sticks to plastic and a small sheet of glass fibre and applied it over and a bit beyond the plastic welded area to strengthen the spout area where you connect the hose.

Investing in a new radiator would be a logical choice.It is a vital component

Great video-very informative, well made, and with very clear explanations. Thank you!

Watched video and impressed with presentation. Will be fixing radiator where small pipe on side of radiator broke off. Video is 'honest' and informative . It will safe me and all from costly fixing. Thanks for a great video.

Great video, excellent workmanship and aptitude

best place to get a new radiator,got one for 48.oo shipped for a 1999 pontiac montana, at sunbelt radiator no shipping charges.got mine in 12 hrs.

Another great video. Funny thing is, I had the exact same problem with my last car. I used JB Weld and it worked for a while but the plastic was just too degraded. I wish I had seen this vid sooner.

Author said it started to leak very little soon after this job, without needing to add as much water, almost no need to add he says. And it held up pretty good for 2 yaers when he sold this Ranger. I think he used ordinary plastic and I saw that the majority of radiator sides material is made of nylon. I'd use a little of its own material collected from Small ribs of it.

the best thing to fix anything even metal is super glue and baking soda. you put the glue on the cracked area and then put the baking powder on it 5 seconds later it's fixed hard as rock

Did this repair to my 2002 sentra radiator and it worked well then more new cracks developed and I bought a new radiator for 55 bucks off ebay. I used black zip ties that are the same type nylon as the radiators. The problem is these radiators have glass fill in the nylon, and is the weak point causing cracking after about 10 years.

I've seen people fix the cracks on the plastic with plastic filler for plastic fender (the good European filler) and weld the aluminum cracks.

I've tried plastic welding. Kind of worked as an emergency. Even better is my favorite.....thick super glue and baking soda. Put a good quality super glue on the crack itself, then imediately shake a tablespoon of baking soda onto it, wait a few seconds and blow off excess powder with your breath... anopther line of superglue and more Baking Soda and maybe one more time and voila.... you can drive in a minute. I drove from LA to Lancaster and back on hot summer day and it held .... eventually I had the time to replace which I did but the super glue and baking soda is a great plastic repair. All kinds of uses.......Maybe someone can explain the chemistry involved. I know it gets hot.

The object here was to $ave money, and repair a plastic radiator leak yourself. Zero money was spent and drove 50 miles without leaks or refill. Mission accomplished.

A good get you home repair, but will cost more for headgaskets and labour for a ruined engine from overheating, because the water loss and constant high temperatures from coolant loss? As well as the antifreeze inhibitors stop rust too 👍

I plastic welded using zip ties and finished with epoxy, worked well

You are the only other person on EARTh who like me welds plastic using solder gun. The plastic on there is number 7, and what you should do is actually find the same kind of plastic but brand new. On an old car that number 7 is so soooo old its brittle. BUt it works.

very creative - well explained tutorial. Probably not a solid recommended fix but great video and explanations of what what going on in your process.

this is not about buying a new radiator, this is on a whole new level of MacGyver type shyte, got a bucket dont want to spend money on it,MacGyver that shyte.

dude sounds like Locke from 'Lost', Terry O'Quinn, one of my favorite actors

Amazed with all those cracks. Good job.

This is the best plastic radiator repair I have seen. Thanks a million. My car has has a hair thin crack less than 2 inches long below radiator cap. Interesting fact I learned is the high temp at the fluid intake from the case. The engine is usually 300 F; what will the radiator temperature be? Thanks again

Excellent strategy for cheap radiator repair. Might work somewhat better if you used the hot chisel tip of iron to melt V shaped groove penetrating 2/3 into material - following the entire length of all cracks. Then go back and do exactly as you did...

Sweet motorcycles AND cheap auto fixes. Welcome to my life.

Thanks for taking the time to post this video, ill try to fix mine after watching this.

this isn't intended to be a permanent fix. it's to help anyone that is short on money and is meant to get you by until the first chance you have to buy a new radiator. just like the ole fashion radiator stop leak. I refuse to use the stop leak as it gets gunky and makes your antifreeze clumpy with the stop leak. had experience with the stop leak, aka mechanic in a can. and it did t seal up the Crack nor stop any kind of leak. just made the antifreeze dirty as hell and was a wasted of 10 bucks. if you can fix it for a temporary fix to get you to the next month or so because not all of us can afford to just flat out buy a new one right away. then do what you can to make it work. as long as your not being dumb about it. I tried this with my saldering gun but had antifreeze comming out at the same time so the plastic wouldn't adhere to the other plastic cause it cooled too fast. but it is a good concept. just like taking a leaking exhaust and having a small patch welded to the leak. if it melts, it can be formed. stay creative people.

Good job. Very informative McGyver :)

The reason most repairs fail is they don't drill the ends first. That way it stops it from going any further. Then you have to use something that can take expansion and contraction. So it can't be some super hard epoxy as it has to be flexible. Just clean the surface real good and make sure no water or anti-freeze is still present. It has to be clean, dry and rough. Use 80 grit sand paper of a file. Then wipe with acid tone once more. Let it dry and seal over with flexible epoxy. It will last a very long time then.

Neat! I’ve done a similar thing by shaving bits of plastic and dissolving them in MEK - making a glue. But these days the feds say you can’t buy MEK anymore. Not sure there’s a suitable alternative to MEK.

Best thing is marine epoxy steel it comes in 2parts just like bondo and it drips like condensed milk but it is the best apply a thick layer ,you have to wait hours for it to dry and then tilt the radiator which ever way you want to apply the glue to the other part of the leak this is the best fix patch a large area its better than plastic weld

Yea when your using pvc type plastic that has been molded with the molecule's in a certain arrangement it will fail. And if the plastic is week it is because particulates in the water or additives is abrasive and will weaken plastic over time, with also hot and cold cycles and weather. The best bet for a more perm. bond is to use a fiber glass kit. but as the plastic is already failed under it, it will fail eventually.

I may try this as while i was testing a heater hose fix i heard a noise and saw a wet spot at the radiator hose, nice straight crack. It's a $100 vehicle i bought 45,000 miles ago and it's not worth scrap price, but it still runs and my coworkers hate it so...... I've heard the nylon tank is the same as zip ties. Radiators for this are cheap, but I'm not sure the van is worth much money and there's other repairs calling for my cash.

it's about giving it a go trying to experiment and hopefully save some money or prolonging the spending $ for a few months. The experience is priceless so even if it does not work out, at least you had a go and learnt lots and even passing learning on like you have on you tube :). Mine has a split 200mm along top tank and slight plastic weakness like your probing plastic technique revealed. im going to repair mine and see how it goes as getting a new radiator is 400au+ dollars as mine had the outlet pipe on drivers side RH nissan terrano2 jap brand "made in spain for nissan" with ka24e engine and looks like i gotta import it myself from UK To AU as no places have my config new in Australia in aftermarket parts. let us know when it goes kaput so we know likely timeline..Thanks and regards

I tried using jb weld. That didn't work! Now I need to grind off the jb weld to get down to the crack. Thank you for the video!

This is a good idea actually. Keep the old stuff working. If it cracks again then replace it. There's a good chance this will hold though. Thanks for sharing :) Curious if you did have an update... Did it crack again? I'd have put some epoxy over top of that weld as well if it were me, and possibly run leak seal through the radiator system as well.

Worth a go aint it :-)) I do suspect you need more heaped material melted into the crack area as there are still cracks inside the rad that takes away from the strength. Hunt for some dead radiators to snip bits off lol :-))

Interesting to say the least. Lol. If you're going to pull out the radiator you might as well replace it.

thanks for sharing my son in law broke mine and I wanted to see if something would work to put it back together

It looks to me like there is a lot of downward pressure on that inlet tube. Considering how soft that material is, I'd say that's just a bad design. Is there any way to support that with a fabricated bracket? A gusset of sorts?

Thank you and, I see you had the same problem I do with that same damn ford ranger.

Impressive stuff bud!

First try the scrap yard. Frequently, other owners installed a new radiator that didn't wear out before the car was crashed or scrapped. I have to say that it's pretty dumb to risk seizing an engine or warping the head just to save a few bucks. The radiator will soon fail at the seam anyway.

I suspect at least part of the cause is perhaps due to the design flaw of clip-bolt location carrying the weight of the radiator not just its main function ware and tare

Good effort mate. Great for a short term repair.

With that much crap in your radiator regardless of the cracks you should throw it away and get a new one and give it a good flush out and invest in some coolant.

I have an '03 Dodge Ram that is spewing coolant where there is a very small crack located right at the base of plastic neck on the top of the reservoir (where the cap is screwed on). I really like your suggestion to cut a small piece of the same plastic to use as a bond. If your fix on the radiator itself is withstanding the heat, I assume that the reservoir should be okay. I'm really trying to just do some "first-aid" here. Thanks!

your.a.genius.you.took.un.useable.garbage.and.made.it.in.to.useable.garbage

when the zombies take over ..this guy will be ready

Can you give us an update in if the repair hold off..?, thanks

How to fix a Hyundai Elantra radiator transmission lines that has been bye pass on replacement one

Thanks Im going to try this. Any special instructions for a crack that looks to run under the crimped metal holding the plastic to the radiator metal?

You may want to find out the reason why it cracked their were the upper radiator hose goes to might have a problem with the engine mount

Greetings, I have had success using hot glue and a heat gun to melt the hot glue. Surface preparation is important, the plastic needs to be ruffed up using a knife to cut grooves in the plastic so the hot glue has something to cling too. Sandpaper will not do, I work the plastic about 1/4 inch on each side of the crack. The surface must be clean and dry before applying the hot glue. My repair has worked so far, but it is in a low stress area of the radiator. Your method has a much stronger mechanical bond and will last longer then my method, but I did mine with the radiator in the car. james

Thank you for sharing your knowledge very appreciated it here 👍👍🙏

Dang dude..get some needle nose to hold that small piece

Best video for people like me..... Thanks

I wonder how Billy May's Mighty Putty would do. I also wonder what it would be like to make a 3d printed one, using the same original plastic ground up and recycled.

After watching this video I will try tomorrow

Great video; is the repair still holding? I was thinking about adding P-tex snow ski repair as a filler; but plastic from the radiator might be better. Or plastic from the radiator reinforced with P-tex.

so glad you didn't move the gas can,, lmao,, BOOM !

By the looks of that radiator, you have been using straight water instead of a mix of water and coolant. That is probably the reason the radiator is in that horribly rusty and cracked condition. Correct me if I'm wrong...

How do you "clean" your soldering iron after that? even if you primarily use it for plastic, wont it need to have the old plastic taken off?

Curious as to how long did this fix last.

The black plastic looks like pvc. Wonder if that could be a material donor.

Dude they make coolant for your vehicle to protect from corrosion and to keep it operating within operating specs, you got more problems than just the radiator.

I would clean the entire radiator of all rust / coolant stains, just so you can see future leaks....just saying

Hi Just saw this video..i see it was published May 2014...Would you please tel the status on radiator..? how long it lasted...?? and how many miles ...??

Removal of structural strength from the plastic support isn't good, as vibrations will make more problems later?

Don't you realize that this goes against everything in modern society?? You're just supposed to just throw it away and buy new!! As a matter of fact, why not just buy a new vehicle? It's only money lol!! Is there an APP I can download to do this?? No? Sounds too much like work. Of course you know I'm being sarcastic. Looks great. Hope you did a flush to get rid of all that nasty junk in the system. I hate using stop leak, but I'll use it as a follow up after a major repair like this.

Take note all you do it your self's - first of all those plastic tanks are meant to be replaced if they should fail, at a very minimal cost. Further - one of worst things you can do for your cooling system is to allow it to become in the condition that is shown in this video.

Jennies! I have almost the same radiator, mine is for F59. I will definitely try this. Can you direct me to instructions on how to remove radiator from 1994 southwind rv? Thanks!

would fibre glass mesh + fibreglass resin on top of the weld work also ??

I tried this approach but failed later on to pass the pressure test... I gave up (unfortunately). ... you should consider adding tweezers to your toolset (o:

*Evidence can be seen.* *Happy to report.* JD hobby repair?🤷‍♂

Sorry bro but with the fact that you totally use no antirust agent,ie antifreeze, the plastic does look a bit weathered. I wonder if u can buy new reservoir s for these cores. Being right around the nipple, future flex seems imminent. But good luck. I have a split in my e150 vertical flow. Very small but about 2 inches long. They make a material that comes in pencil diameter 6 inch length s that are made to melt in to the split. I believe the trick is heating the new and old material without melting more than necessary. Just for curiosity, how long did your fix last?

How long did this repair last? I just had the radiator replaced on my 07 Saturn Ion. Shops would of course replace the rad because the job is only done once whereas a patch might be a return down the line and no one wants to warranty a patch. If I had time and a second vehicle, I might have tried that as I too had a crack in the plastic. Don't make rads like they used to. All metal in the 1970's.

Excellent video

In 50 degree weather with a hole in the radiator how long would it take the car to run hot?

Loved your power to analysis and diagnose the problem in first place. Forget about the repair part but only if Henry Ford could have you and fire their fat idiot top head engines, he could save millions of dollars. Good job man. Thumbs upped and subscribed.

Seems like a poor design to have part of the radiator plastic since it fails easily, why don't they just make the entire radiator out of metal?

kinda rusty you running just water in that?

hope i aint repeating another comment_ the rusty scaly water coming out of the radiator suggests that this guy was running water for some time in radiator_ while a-freeze is super expensive, and it's understandable, some sources say that corrosion in your engine is not worth it_ i'm not saying that's a fact, just a risk_ still, no money, beat up truck...

Can you buy the plastic ends for the radiator?