Belt started slipping and squeaking in the rain over time getting gradually worse one day to the point the alternator pulley would loose a grip on the belt and the battery light would pop up and power steering would go out for moments. So I figured the belt had been replaced before and the alternator is brand new I bought a serpentine belt tensioner and swapped that out but helped for a little, then the belt still squeaked!!So decided to check the belt and it was torn in a couple spots so replaced the belt with a brand new one from AutoZone and cranked up with no squeak….until the car sat overnight and went to start the car and the noise came back!!! The belt would squeak for the first 5 to 10 minutes, but after driving it and giving the car time to warm up the squeak would go away temporary, but still it would drive me crazy. I was so frustrated and tired of throwing money at the car and the last thing imma do is take it somewhere when all they’re gonna do I ask for more money. So in a last effort I came to KZfaq looking for answers. When I saw the video was a little skeptical about it but bought the 303. The only place that locally sold it around me was Acadamy and it cost me $25 for the smallest bottle they have but I followed the video and the car hasn’t made a single noise since. I sprayed the 303 two weeks ago and was waiting to comment to ensure it really worked. Since then I’ve driven in the rain multiple times and not one time did it squeak! Thank god I found this video for the much needed answer. Definitely left a 👍🏽

You saved me so much. I know nothing of car was going to go to a shop and something said research and go to KZfaq. I found this video and saved more money than I would’ve. Given the fact I’m a woman they would charged double and probably done the same thing! You’ve got a viewer for life!! ❤

Pleased to say that this worked perfectly! I had a loud belt and knew better but sprayed it with belt dressing. As usual it made things much worse. Cleaned it off with brake cleaner and applied the 303. Not a squeak since! Already tried it on another vehicle successfully as well. Thanks for the video! I'd have never thought of it on my own.

THANKS! I've been chasing down a belt squeak for two months. It's been driving me crazy. I even replaced the belt tensioner on the slim chance it was a weak spring. The belt looked absolutely fine. No cracks and not old. It still squeaked. I watched your video and the water stopped the squeak right away. I drove to Walmart and got a bottle of 303 Protectant and sprayed it on in the parking lot. Worked right away. Sounds like a new truck. I would never have guessed.

Perfect, took my squeaking belt to a mechanic, he said that my new 5 month old water pumps bearing was the problem and wanted to change the water pump..I got 303 and sprayed it on the belt...solved the problem 123,I love u guy.lol

Tried every trick in the book over the last four months, including replacing the belt. Still got all kinds of strange noises from the belt. Finally, I found your video and used your system. It works! Thank you. My car sounds better than it has in months. I may even re-claim my sanity now.

Been dealing with a squeaky belt for about a month. started replacing bearings. Still squealing. Watched this video today, bought some 303. Dead silent. Two thumbs up!

Had my 04 accord v6 get the power steering hose replaced for free at the dealer for a recall. When I picked it up the serpentine belt was squeaking due to power steering fluid being spilt on it. The dealer asked if I would like them to fix the noise I said no because there just going to do some half ass quick fix. I drove it around figuring it would just burn off, nothing. Washed it with a pressure washer and some mild detergent, nothing noise was still there. Remembered I had 303 from my headlight restoration, put it on there and like magic noise was gone! It’s been over a week and quite. Thanks just wanted to say I should have remembered and looked on your page to see if you had a fix for any car issues first!! Thanks again and also headlights are still looking sweeeeeet after 6 months!!!

This is AMAZING!! Of ALLLL the channels I've watched about belt noises, yours is the FIRST AND ONLY channel that offered a permanent simple solution instead of buying a new belt!! Thank you SO much!! I am now SUBSCRIBED AS WELL!!!

BRILLIANT - This has FIXED my serpentine belt issue after replacing tensioners, belts, more belts...etc Thank you. LEGEND!

I'm gonna try that partner that stuff is magic!!!! thank you for sharing! I'm living on a prayer! God Bless.

Oh my god I really can’t believe this is working amazingly, it solved my worst problem I just seconds thank you so much guys u r amazing 👍

I CAN'T THANK YOU ENOUGH. I was told I needed to replace my alternator when I had my car checked. I decided to look for online advice first. Your video saved me $380 and from getting $crewed.

Just to add another testimony that this really works. It's amazing . Thank you for sharing this hack.

Love your videos, I feel like you're the helpful neighbor I never had. Cheers!

Totally works. I’m shocked. Had a squeaky belt. Knew it was the belt since spraying it with water would shut it up immediately for a short bit. Bought a brand new belt. It started squealing on day 2. Had some 303 on hand. Sprayed the piss out of the belt and it’s silent as can be and has been for awhile.

Wow saved me so much money just now I was about to replace alternator and water pump cause of noise. I have already replaced it with new belt and an idler pulley less than 2 months ago and all the other pulleys are good, and after spraying this on it went completely quiet.

Oh my goodness!! What??!?! To say that I've been annoyed with my squeaky belt for MONTHS is an understatement! So glad I stumbled to you video! Thumbs up and subscribed!

My 303 protectant arrived this morning. I ordered after trawling KZfaq for a way to stop my serpentine belt squeaking, even from new. This, has, WORKED! Thank you! Can't believe it! I driven around 40 miles today, stop/starting and not one squeak! Left the car for a few hours, started her up, again, NO SQUEAK! Excellent! Thanks again! 10 out of 10 to Sweet Project Cars!

IT WORKED! Sprayed the “303 Aerospace Protectant” on the belt and hasn’t squeaked/squealed since! Thank you very much!

This is the best repair EVER thank you so much for your great words of knowledge

Always " never thought of that !" Everytime I watch your videos. And I've worked on cars a very long time. Thank you for sharing .

Sweet project, my brother,,,my friend,,, I have a 2000 F-350 for the last 5+ years I've had to put baby powder on the belt and even new ones, at least once a week to stop the squeaking. Since you turned me onto 303, I put it on there a month ago and haven't had to do it again since. Thanks for all your great advice!!!! Keep up the great videos and I'll keep smashing the "like" button!!! God Bless!!!

I'll admit, I initially called BS, it works!...much respect. I did this on a cat c-12 diesel in my dump truck......nothing & I mean nothing else worked, & the belt was fine, no cracked ribs or dry rot. Thank you for sharing!

Wow....can’t say enough thank yous. I’ve been driving around with my squeaky shit for 3 months and I couldn’t figure out what was going on. The water stopped the squeaking and I’m on my way to get some 303. Subscribed!

Thank you , another first class video..

This really works, I got a Chevy express 1500. I cleaned the belt and pulleys with water and soap and then applied the protectant. And now it smooth n silent running.

I have a 1998 GMC Sierra and live at a high elevation in central Oregon. My engine has been SCREAMING at me. So loud I thought for sure it was the bearings until I did the water trick and it stopped for a few seconds. Went to my local shop and bought some break cleaner and the 303. Turned the engine on and sprayed the belt down with the cleaner to get the dirt and dressing off it. Then sprayed it with the 303 and the squeal stopped in seconds! I forgot how quiet my truck was when idling. THIS IS AMAZING! You earned a new subscriber 😎👍

I use a long screwdriver or other metal device with a handle and touch it to the fronts of the pulleys (the center part that is not moving) and around the other components. This makes it crystal clear where the noises are coming from. The water trick works also, but maybe both methods together. The 303 protectant sounds great. Awesome video, thank you!! I have heard Gatorback belts are good for this as well old chap. It's a very jolly day when the squeaky belt goes away. That noise is enough to drive all the Queen's men absolutely mad - which is among the many reasons I do not have children or a squeaky belt. God save the Queen.

I expect that sound to come in the near future..but for now, I will keep using that spray until im able to get a new belt.

This makes so much sense!!! Thank you I have always thought of doing this but I thought I was crazy! Thank you and you've got yourself a new subscriber

I am contemplating replacing the belts, so this is a godsend. Mucho, mucho gracias. Going to O'reilly's tomorrow morning.

Got a mechanic from Canadian Tire to put in a new alternator and guess what... now my truck squeaks. Will try this method. Thank you from a girl whos not afraid of getting her hands into things. THANKS

excellent. this is now one of my fav channels! btw, i need to put one on my daughters car, could use a vid...thanks

I was skeptical, but I tried the 303 Protectant today and it worked. I couldn’t believe it.

Thank you for posting this video!!! I was going nuts trying to find a solution to this before I took it to a mechanic. Just ordered some 303!!

Thanks for the advice, followed it( after replacing idler and belt tensioner) and presto it was the belt even though it looked perfect.Before I ordered my 303 I then tried as a temp fix some Armor all protectant and so far it has worked! Thanks again

AMAZING. This works. Make sure you clean it good fist (you can also use brake cleaner) watch this video a couple times and then do it!! Worked amazing for me. Stopped my squeaking on my Mini Cooper s 02

I so wish to have found this video 100k miles ago. I endured belt squealing for the better part of 197k on my 99 Chevy Malibu. Went through 3 serpentine belts, 2 water pumps, and 3 power steering pulleys. After the last power steering pulley I decided to really investigate this cold start belt sound... new parts shouldn't squeal! Got me a bottle of protectant for rubber plastic etc etc etc... problem solved!!! No more squealing in cold weather, no waiting to warm up, no squealing PERIOD!!! Thank you!!!

I’ve always had great success using lava soap and holding it under the grooves of the belt with a pair of channel locks while it’s running. It really cleans the grooves of the belt out. I’m gonna take and try some of this 303 to try and get rid of what I’m thinking is an alternator squeak but I’m gonna go ahead and try it 👍

I'm so happy to know that Adam Carola is a mechanic. Nicely done Adam!

Must have shares in 303 lol, I have to try this, just changed alt on my bronco and now I have a squeak

Thank you so much... I was so embarrassed while driving and that squeaking was so f**ckin loud. Went to a mechanic and they said i had to order a new belt and they will change it for me for $200... When all i had to do is buy a belt conditioner to fix that problem.. Thanks so much man..

Just subscribed. Anybody that gives props to 303 like you do has got to be ok. Love it myself gallons at a time. ThNks for the videos 🤘🏼

I have changed my pulleysnon my supercharger and changed the belt numerous times, even the idle control pulley. Squeak when cold start up. Takes around 25 mins of embarrassing driving to shut up. I tryed this spray and you know what... It actually worked. I soaked the belt in 303 for overnight in a container and it hasn't made a sound yet. What's better us that I don't experience belt slip under boost either. I'm not sure how that works, but it just goes lol. Thanks mate. I have been putting up with the noisy belt for almost 1 year.

You don't need to use as much as he did on the video. Just a couple light mists and it's good. I did mine a couple months ago and it does work.

I started doing this on the same belt that came with the camry when i first saw this video at 300,000k miles. Then spray-treating the belt every 20/30k for 5-10 minutes while it idles. The belt now has over 452k miles, makes no noise and still runs like new as far as I can tell. The only confusing thing with this product is there seems to be a few different names for 303 products that actually do the same thing - and for all intensive purposes, are the same thing (i.e., 'marine & rec aerospace protectant' vs 'Ultimate UV Protection', etc...) Correct me if I'm wrong, but I think it's just a marketing ploy and it's safe to use either product because they are in fact the same; I've used both with no problem.

This is what I'll be doing, cheers for the trick. This stuff looks very flexible....

You, just got yourself a new subscriber. Thanks, for this hack. My car, was bad with that noise. But, not any longer. Thanks, to you!

Nice work indeed, very well explained too. Many thanks for sharing your expertise.

Thanks. I've battled for months changing pulleys and belt with no luck but this seems to have fixed it

10000000% works, this guy is amazing. Super genius. True knowledge share

Very helpful video. Soon as I watched it, walked out with a bottle of water and found out it’s my belt.

Great tip. Thanks. As a kid I would often use my Mother's hair spray to stop the squeak. Now that I'm an old guy, I just let it squeak... But no longer.

Friends....wait till you see the next video on how you will NEVER need to REPLACE an idler pulley or tensioner pulley EVER AGAIN ! :)

This video saved me £130. A PLUS. Keep up the good work bro. Thanks.

Ok so I too was skeptical but I’ve replaced all my tensioners and belt x 3 so I figured it’s only $15. I’ve been dealing with this for over two years. Went down to Oreilly, bought it and sprayed the belt in my IROC in the parking lot. I put about 20 miles on it and zero squeak. Thanks for the tip, I have a 75 mile car cruise next week so I’ll see how it goes.

Warning no long sleeves or chains wearing while doing this i watched my dads sleeve get ripped off cause it got caught on the belt

Absolute genius!!

Good sensible practical effective no-BS videos. Thanks from Northern Ireland. Watched many of your videos and have just ordered a bottle of 303 from eBay ha. Let the snowflakes moan, we're above them.

@Sweet Project Cars So I ordered the bottle of 303 from Amazon for $20. Let me say WTF...just one spray and the squeak was GONE INSTANTLY. Of course, I sprayed a little more on the belt & let it run for a minute or two, but this product is unbelievable. Thank you SO much for sharing your knowledge w/ this life saving video, sir! GOOD BYE YOU DAMNED SQUEAK!

another brilliant tips..i'll never know this tips before...thumbs up...TQVM..

This fixed the squealing issue on my Nissan 350z. Thanks for the tip!

I'm laughing cause I thought you had to take the belt off first 🥴 You can leave it on ! Subscribed

Thanks for sharing boss. You’re the man.

Could you show how you use lacquer thinner to clean the belt? I assume you also leave the belt on while doing it. Thank you.

Thank you. it worked for me. I tried a few cleaners that failed. 303 was the winner.

Thank you, thank you, thank you sir.

No one : Me: that’s what I sound like a when I laugh it’s squeaky

Wowwww I'm so happy to say that this method HAS FIXED my squeaky steering belt problem. I was surprised to hear a squealing sound coming from a brand new Dayco Poly Rib belt. Next time, I will try the Good Year Gator back belt, but for now, this is an awesome fix to get rid of the squeaking sound!

Awesome did this weeks ago and the noise is still gone :) thank you spc

Thanks, on this great tip for serpentine belt!

I had two squeaky pulleys that I removed and spun by hand to verify the dry bearing sound. I replaced both and it still squeaks. I had a few issues. The belt must be the last one I’m still hearing. Thanks

I watched your video lastnight, go to shop and got 303 today And squeal gone! Thanks for save me bro, you awesome I

I used a spray bottle, It was definitely the belt. Thanks for this new to me trouble shooting tip.

Thank you so much brother you are wonderful man

Blessed video! Is this a temporary fix or should i still get belt replaced? I had a truck where my belt broke off and i couldnt turn the wheel so i want to be safe?

yet another great video from Sweet Project Cars 😀

Awesome video and great idea! keep these video's coming please

Very cool, heres an interesting one though. Sprayed it, sound went away, took off the belt to replace it, and noticed the alternator pulley was squeaking

thanks for the video, just what i need. A question: does it have to be 30382(the one in the video), can i use 30302 or 30305? the latter two have different bottles, not sure exactly as 30382 or not. Thanks a lot.

Wow! I had tried just about everything. This worked! Thank you!

Yay!😃 I can't wait to order this spray product.especially, on my Nissan Murano SUV when it is raining or extremely humid it's very embarrassing when I start my car sometimes. it made me feel better when I read that I was not the only person that had just had new belts installed and still not long after the squeaking has recurred at times. I will be back for an update in about a month :-)

I did all this on my dodge diesel. Then changed the belt but the squeak came back even worse. Finally tracked it down to the tensioner. A constant squeaky belt noise is usually caused by extra drag from somewhere. My opinion.

Thanks for sharing interesting video. May I ask why "Belt Dressing" (bought at local auto stores) is not as effective as 303 UV Aerospace conditioner? I would think "Belt Dressing" is specifically designed for belts. I think you or someone may have mentioned that "Belt Dressing" is too sticky, but one would think it works like 303. Thanks for great videos!

Your tricks are awesome...have used many of them🖒😆

This fixed my noisy belt problem. Thanks

Thanks for the well done video! I would use dish soap or alcohol to wash the belt and you can spray the protectant on it while the engine is not running. Then start it right after you spray it so it spreads the liquid all over and under the belt.

Water with ice or just water??

These are the shortcuts I live for. Thank you

Top tip friend. Tried it. Worked. Everybody happy❤

Hi there! Do I have to clean the belt before I spray 303? I have a 2014 Audi A5 and it is TIGHT in the engine compartment. There is just a small area for me to barely spray 303 on the belt itself. I'm afraid I will only be able to get to the smooth side of the belt, as the area is so tight, the grooved area of the belt is blocked. Will my belt still be protected if I can't get to the grooved area? I really appreciate your videos! I'm a single lady and I like to save myself money by doing preventative maintenance! 😀

This works. Replaced my alternator then I had a chirping noise appear. Noise went away with water. A couple sprays of 303 on the ribbed side instantly fixed it. Thank you

Thank you for the informative video!

Brilliant ...thank you my friend ... I will take your Advice and apply it ... I believe this will def work and as far as redoing it i would just reapply every time i powerwash my my motor maybe once a month or month n half ...i think that would be about correct wouldnt folks ??? I had a late 90s model GMC extra cab 4x4 with long bed that i actually made into a dump bed but still the stock bed ...n it was lifted with just 35s and triple shock mount with gas charged shocks n well you get the drift ...i could go on forever lol .. Heres the thing though ...it had the stock motor with super low miles under 80 i believe when i purchased her ... I never knew about the serious issue they had with the new single belt system they hed switched to from the old school triple pullys like each pump had its own belt so since they switched to the single the way they had bolted the power steering pump went to the block below 2 bolts into block then 2 upper on another bracket that went to the front of the head and the first bolt going to the stock exhaust manifold ...anyway the point was was that it kept chewing up belts n squeaking like crazy when first baught frey at edge n tear up finally chew it up n snap ...this went on for about almost a year and i thought ok maybe its because i wash the motor monthly and powerwash it spray it with degreaser blah blah blah ..turned out that the bottom 2 bolts snapped off inside the front of the block and what they did was actually just weld the bolts onto the bracket of the PS pump so it looked like all bolts were in and secure .. But when ya ran the motor n jumped up into the motor comp.. You can see the belt wobbling just so ever slightly .. So i pull the whole surpentine system/single belt off till the whole front of the motor was stripped completely and i can see that the power stearing pump bracket had the bolt heads tach welded on and the bolts had been snapped off into the block .. So im thinking nightmare ...this is why i got this truck so dang cheap ... So to make this shorter then short book ...i had welded a bolt onto the front of the snapped off piece of bolt so eventually i can back em both back out ...cause this whole time im actually thinking ok let me do away with the new SERPENTINE system and go old school single belt to every pump n altinator ... So the point was that i actually thought that cause i cleaned n washed the motor so often that i thought i was not using a good enough conditioner for the belt ... Thats why it kept chewing up n tearing apart till it snapped i would say almost monthly ...cause they actually did not take the time to do it right and just weld bolt heads on instead of tearing off the front of the block and extracting the threaded bolt from the block ...NOPE ..do yeah thats the outcome but heres the thing i still wash the motor ona almost weekly cleanse ...that i need something to condition the belt and im asking if anyone has had an issue with the belt being to dry and this stuff 303 the stuff shown in video ...will that correct and how often will i have to apply the conditioner ??? Anyone ??? If ya actually made it through the whole post i would love some feeback ??? Thanks folks ...stay blessed

So, the belts and idler bearings went out on my BMW. I saw your other video on how to treat belts with the 303 aerospace protectant and I treated my new belts before I installed them. I got new idler pullies and installed them with the treated belts. It still squeals whenever it starts up and when I put my foot into it. Do you have any ideas as to what could still be squealing?

Just so people know, the bearings inside the alternator itself can also go bad. It happened to me. There was a squeak and it got louder as it went on. I got stranded at a downtown parking lot and had to replace the alternator right there. The inside of the alternator was shredded, copper and metal was building up underneath it, ceased up and your motor won't turn over. So be sure it isn't coming from your alternator.

Thank you so much been having this problem for a long time.

I got some of that 303 for protecting plastic lights and tires, so I tried it on my belt. Amazing. I was sure that sound was a bearing. Too bad I had brought a new alternator :-/ Well it can sit on the shelf for a while.

I'm going to have my wife spray 303 on my belt so that way it comes off easier after work ;)