Grinding Noise From Under the Hood? How to Check the AC Compressor!

For More Info visit us at: 1aau.to/h/cn7/
Do you hear a grinding noise coming from under the hood of your car or truck? In this video, Len shows you how to locate and investigate those noises, to see if its a pulley, and which one! He also gives some important advice about servicing or repairing AC components yourself.
Check out other diagnostic videos here:
• Driveway Diagnostics!
For More Info visit us at 1aau.to/h/cn7/
⚠ DISCLAIMER:
While 1A Auto strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. 1A Auto is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video.

[@1AAuto]

√ *Watch the Video* √ *Buy The Part at 1A Auto* 1aau.to/m/Visit-1AAuto √ *Do it Yourself* √ *Save Money*

[@anthonyb1041]

When my car's ac wasn't working, I heard an inconsolable crying and sobbing sound....it was me.

[@coreinstincts2659]

This is exactly the noise im getting from my car, been on you tube for hours tryin to see if anyone has had this issue and you solved it for me thanks guy

[@joshguelcher7118]

That intro was litterly how I feel at this moment 😂

[@Ciana_Baby]

Lol same

[@miguelgomez477]

Litterly

[@JoseReyes-bg7rk]

Same brother mine is doing some weird noise

[@gomerpyle1886]

I see you didn’t suggest to just replace the a/c clutch. That one is an easy one right on top. That noise is the clutch does not have anything to do with contamination in the system!

[@marvinfoss7795]

Excellent video! Clear, concise, right to the point & no B.S. .Now, If I could only fly you, your tools, your evacuation & and recovery tools here.....lol! You should do a 50 State tour and start HERE! Thanks for the help and keep them videos rolling!!!!!

[@jacobwebb8818]

What I really learned from this video 1) definitely 2) of course 3) obviously (obviously) 4) replace A/C dryer every few years

[@macygirll]

Extremely thorough + knowledgeable. Thanks!

[@danielchapa2430]

I’ve been looking for a video with the exact noise and couldn’t find it until now thank you 🙏

[@duranbailiff5337]

We appreciate your telling us the whole story of the issue!

[@patrickfullerton5859]

Great tip on how you hear where somethings coming from using that pry bar

[@daviderhahon]

Len and Details are never far apart.

[@arinhiwa4017]

You are expert in repairing car parts generally .

[@jerrypoparad3698]

Professional first class video. Thank you very much.

[@1AAuto]

+jerry poparad Thanks for the feedback!

[@ChanceJolivette]

How about just replacing the clutch? Pros and cons?

[@onerekord3778]

I love your channel. Keep it up

[@aidene4441]

Perfect timing I needed this video.

[@zeez9053]

Excellent video as always 🤘🇬🇧

[@1AAuto]

+Flicki Flak Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

[@kasiryeallan9810]

You are wow I love all your videos and the explanation in them has made me go miles

[@1AAuto]

+Kasirye Allan Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

[@clarkgable2733]

Thank you for great video. My A/C pump has a sound like it is cavitation (a whining sound). A/C charge is good and I added some Freon and A/C is cold.

[@guildensteinfoutch6232]

My car sounds like this. It Just started two days ago the ac is ice cold still but the noise is pretty loud. Had it checked and two shops think it's the ac compressor. I'm hoping since mine still works great I'll just need to replace the compressor.

[@TheEdgeLord]

My ac stopped blowing cold, but makes a grinding noise when I shut it off. So not only am I in the Texas heat but I have to keep it on and blow warm air to stop the grinding noise

[@happyvault4693]

I wish these videos would play the sound it was making that would help big time

[@cristenk7230]

Great video! Thank you so much. I now understand!!😭

[@chrischiccino88]

When the shop told me this the other day I said hey well mr mechanic, I just replaced the compressor only in my pathfinder about 2 years ago and its just fine. Whats the difference in me doing that now for the compressor I need for my other car?... He essentially told me if I have moisture or debris in there than it will work but its gonna happen again. As I continue my due diligence I humbly admit I was arrogant and wrong. He was the mechanic I had evac the system... Glad I havnt put the new compressor on I got a few more parts to order...

[@sagifern4444]

As always - very enriching

[@1AAuto]

+sagi fern Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

[@GoonieGooGoo410]

Can this problem also cause a burning smell? Almost like a burning burning or metal smell? I have a grinding noise like this on a 2009 Honda crv

[@jomanallen]

I love the intros on these truck vids.... so accurate 🤣👌

[@paulcardone481]

Awesome video

[@veronicahawthorne3452]

Great video! My 1993 Toyota compressor has made a grinding, droning noise for years. Although it blows cold, the noise annoys me at times. Should I replace the compressor?

[@salvadorsepulveda6415]

How about changing the ac pulley instead of a check list next time. Blessings 🙌

[@1AAuto]

+Salvador Sepulveda We're always cycling through common cars. We'll add this repair to our list! 1aau.to/m/Shop-1AAuto-c

[@marshallborder9089]

Good information

[@karinash9373]

Hey Glen, got a 2006 Suburban. My compressor started smoking/squealing at about 2,000 - 3,000 rpms. I took off the belt and the compressor never locked up on me. Would it be ok if I just replace the compressor since I caught it in time? Thank you!

[@user-hq7ff6kx6b]

Hello. Thanks for the nice video. My car is Fiat Bravo 2008 1.6 diesel and since I have it I have issues with unstable rough idle, more noticeable in the summer. I tried a lot of thing with this car and no improvement, visited a lot of mechanics, diagnostics etc and nobody can't find the issue. Having in mind that the rough idle is more noticeable in the summer I started to think if there is a problem with my air conditioning and more specifically sticking AC clutch or something like this. Last 1-2 weeks my car was working fine (I am not using AC anymore as it is not hot), so a few days ago I turned on the AC and I didn't noticed any issue, but after around 20 minutes I had to drive my car again and after starting it again the rough idle was there again. So is it possible my AC clutch to be sticking for some reason even after the AC is turned off and this to cause the rough idle? Thanks in advance!

[@albertjackson9236]

This guy did a great job.

[@BoylenInk]

Kinda weird the video doesn’t discuss the question of whether the problem is the whole compressor or just the clutch. Most backyard mechanics should be able to replace a clutch. But if it’s the whole compressor, who has an a/c servicing machine in their shed? Might as well just tell people to take it to a professional at that point.

[@kenopeter7290]

Do you advice I change the compressor only and flush the system with flushing agents or change compressor, condenser

[@Pinkielover]

$1,200 ne compressor going on 7 years well worth it ..The company in Arizona knew what they were doing they're located in Tempe And they only deal with AC ...I forget the exact name ..

[@curtisbradley7497]

Not real sure it would be necessary to change all of that on that particular vehicle! The way it sounded when he spun it with your hand sounds just like the AC clutch not the whole compressor

[@1AAuto]

+Curtis Bradley Thanks for the feedback!

[@mauropatrile2272]

And thank for the video!

[@Tonetruk]

I don't understand why you wouldn't suggest just changing out the clutch pulley or better yet just changing out the clutch pulley bearing.

[@chrispayseur6913]

Because they sell the expensive parts too.

[@michaeldelouisa1824]

Just replaced alt.and there is a wining noise is it a faulty alt. Or think it is a pulley bearing?

[@love198313]

2015 Altima 2.5 SV, on clod start knocking sound from belt side of engine. Once the engine warms up it disappear. what will be the reason, any solutions?

[@nissanslut7870]

Len: ok “shinyness” is a poor word for the belt being that they usually have a clear plastic coating on the back ensuring the part numbers show. Look for metal strands like in tires or rust if you are in the north. Yes I’ve seen rusty belts

[@mauropatrile2272]

When the AC noise in the interior of the car follow the engine turns,could be the puley or the expansion valve? My car is 5 years old and also i think nobody charge the gas!

[@georgedoughly8682]

My ‘91 Z28 Camaro was making that same noise and it was from the bad bearings in the AC Compressor.

[@juditasgutierrez2910]

I was wondering why they had to replace the hole thing too, just sounds like the pulley, if its they compressor would'nt it make noise when the clutch kicks in 🤔

[@dariuslatson7685]

My screws between the pulley and AC compressor have came loose and are grinding against the pulley. Help

[@mooauto2388]

My 2013 explorer is doing the same noise currently so is it really the ac compressor mine don't work too ?

[@angelitojusay593]

that intro lol

[@krevenis5118]

When you first started the car what was that sound in the beginning of the video?

[@virgilstraker5211]

What's a sign that your AC dryer is bad? Would the AC lines have a lot of condensation on it?

[@The_Real_Indiana_Joe]

AC receiver dryer??!! Never even heard of that. My old truck is, oh.... 18 years over due 😬

[@peter5627]

thank u for this video

[@1AAuto]

+peedah Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

[@susan6398]

Thank you so much I looked at so many videos I had a grinding noise in a 2003 Volvo S60 I know it was from coming from the clutch but I think that the bearing went because when I went to turn the car on it click like a dead battery. I was told that it was the AC bearing but I am a woman and I know watching so many videos such as yours that you need to really check every pulley. But the car will not start. A serpentine belt will not turn over I don't know if it's the compressor or the clutch assembly. I would appreciate any help. I did watch your video it was very informative but the car will not turn over. Can you possibly do a video on what to do in this situation?

[@1AAuto]

+Susan We're always cycling through common cars. We'll add this repair to our list! 1aau.to/m/Shop-1AAuto-c

[@douglasandaluz9052]

Do you Recommend to Replace and 2002 chevrolet S10 Replace the value lifter it's not cost to much please let me know

[@pilgrimhere652]

Bad news😢That is the same noise in the compresor of my Aerio 2005 , Im sure that part cost a lot more than other parts, Why me?😭, Well , Air conditioning feels so good,Lets do it, Thank you Man , Many of us are learning Mechanic from you guys , .

[@1AAuto]

+Pilgrim Here Thank you! We love empowering our customers and showing how to perform DIY auto repairs with our high-quality auto parts. 1aau.to/m/Shop-1AAuto-c

[@kasiryeallan9810]

I'm soon becoming a diagnostic specialist

[@estanislaoduran3099]

Thanks

[@muddbox3322]

Is it true a new edge mustang needs AC for the fans to work. Keeping the engine from overheating?.

[@ThomasJones02]

Really helpful video thanks! Now to get quotes and say goodbye to a few hundred &££ 🤣

[@dlaroc]

I’ve been getting a squealing sound when idle that gets really loud but only sometimes. If I hit a bump, sometimes it’ll get louder. I have Firestone saying it’s my AC compressor but turning AC on/off has no effect on the noise. I wish I was a a mechanic.

[@richardcope3077]

The belt spins the pulley for the AC compressor regardless if it’s on or off. Sounds like a ac compressor or a loose or worn belt

[@mbs5328]

Can we just replace the pulley on the A/C compressor?

[@DaddaWins]

Yup, you will need a new clutch kit.

[@clearminded9338]

what happens when it goes out completely will my car still run?

[@floridadylan4331]

What about on my 2007 Toyota Corolla, if I rev on gas peddle in neutral it makes a noise under hood. But when I engage my clutch like just put food down the noise stops .??? Please help My car is manual 5spd 07 ce Corolla

[@1AAuto]

+@floridadylan4331 We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

[@elpapituyo86]

Hey is the TRQ channel an extra place for you to do additional repair videos?

[@1AAuto]

+Rafael Gonzalez Thanks for watching! Yes, TRQ is another repair channel that has additional repair videos.

[@rolandos64]

Is it possible to know if the bearings on the ac compressor if it has any are bad? I removed my ac clutch because it’s loud at all times while the car is on. With the ac on or off. I’m convinced it’s the clutch pulley bearing. But how do I know if the ac compressor bearings are bad too? Clutch is $200. Complete compressor is $350 new! It’s an expensive guess

[@1AAuto]

+No Name We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

[@bradh6185]

How do you know its not just the pulley bearings?

[@HeavyContents]

Dodge magnum 05 3.5L .... the shop told me 17hun..... im like why he said ineed to replace all those things but ibought a compressor ijust wann cross my fingers an put it on but I really need to know what it is ineed next to complete the entire system.... thanks in advance

[@1AAuto]

+MOVIE SCENE KINGS & QUEENS Thanks for checking us out. Shop for high quality auto parts on 1AAuto.com: 1aau.to/m/Shop-1AAuto-c

[@dwfinds3030]

Any tips on grinding noise when pushing the gas just little? seems to go away once going at least 30. Coasting or braking no sound.

[@righteousmasculine]

I’ve been having this problem sometimes in my 2006 navigator

[@danielvitalis3924]

Hello i experience same thing, did u figure out the problem?

[@justinb.1459]

Loose belt

[@melodic8602]

Did you find out what it was?

[@Stinow]

Same here ..

[@theroyalone7588]

Is it a machine test that can test the ac compressor?

[@johnathanleonardo912]

My 03 S10 has that exact problem especially after a heavy rainfall it does that. It squeals as well. Maybe that's why I have no AC

[@1AAuto]

+Johnathan Leonardo We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

[@jonathanmason2569]

Why not spray lube the bearing?

[@Imheem90]

So I just replaced my orifice tube, accumulator, and in the process of recharging my system, my clutch starts grinding really bad. What would cause this?

[@1AAuto]

+Daniel Pelaez We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

[@ayearetee3342]

Did you ever find out what this problem was

[@franciscomejia3036]

If you're the type of person who gets uncomfortable driving around in 90⁰ heat, you might wanna change your compressor.

[@mark-grumpy-aged-man2472]

were you in the original Robocop ? ;)

[@IhateyouYouTubekys]

Sometimes when my AC runs I hear a loud rubbing sound like a horn

[@hammadmadi4285]

Hello Sir i am From pakistan And Mechanic i have a vitara And the left rear Tyre is getting wear out from outside bcus there is positive chamber but i dont see any adjustments for Chamber how can i fix that

[@AlexanderDGreat21]

Change wheel bearings

[@ambergutierrez5092]

No ac no noise. What to check 1st?

[@Rae-lh7ex]

Thank you, I have this exact issue with my 2021 Hyundai Santa Fe, only 3000 miles, so disappointing

[@1AAuto]

+Rae Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

[@cardo1111]

A/C work is notoriously expensive, for reasons you outlined and unfortunately best left to a pro.

[@Ciana_Baby]

I put on a “refurbished” 4 seasons compressor and it’s making that noise after paying $200 for it!

[@julesrobert9995]

MY AIR COMPRESSOR CUACH IS SOMKING WHEN I TRUN THE HEATER DOWN

[@Dawnnie473]

2021 and for a 2013 ford focus was quoted $1700 to replace. Just told it was an ac clutch? The replacement is 1/3 the price of the entire car @_@!

[@LauraSilva-zm3gf]

Do u even need the belt if u don't need ac

[@ydiscoveredydiscovered5223]

Thank you do you guys have free shipping?

[@1AAuto]

+Ydiscovered Ydiscovered Yes, we offer free standard shipping to the 48 Continental US. There will be a charge to ship to HI, AK, GU and PR.

[@usaflag7305]

Just change the pulley why they trying to make it so difficult.

[@SergSpace]

What's wrong, how to fix, how much would it cost - that's the question people would look for.

[@user-ed1yx2fq7l]

3:25 tf lmaooo

[@pointyduck6422]

What if my exhaust still smoking when car is off

[@juditasgutierrez2910]

It must be on some good ish lol idk that's an odd one

[@DobleWhiteAndStabley]

Oh good... It was just the ac compressor lol. My ac doesn't work and I have a spare.

[@fieldsofomagh]

Ders no smoke without fire. Time to break open the piggy 🐷 Bank and face de music. Hot weather comes along and who cares ❤ about the cost. Priority is the key to proper living.

[@CarbonGlassMan]

Is it illegal to evac my AC into the atmosphere? Yeah, I don't care. I'm getting a junk yard compressor and changing it in the driveway.

[@hectorjunior9374]

I ordered new ac compressor kit took it to mechanic and supposably it was fixed but an hour later it's started smoking under hood and ac went hot...now I'm watching videos cuz I can't trust anyone and don't know what to do..

[@Manmadecontent]

Same problem with me did u ever find out what's wrong ?

[@ShakeandJake]

Why the heck are you listening to that pry bar lol

[@dc5723]

That machine is very expensive as well.

[@sawatechjp]

The cause of the noise is the pin and ring backlash and scroll between sounds with each other hit of the eccentric coupling. Therefore, the rotation speed is limited to 6000 rpm or less, so the mechanical efficiency is poor and the life is short. The only solution is to use a double conical roller, which reveals Toyota's low IQ.

[@LauraSilva-zm3gf]

Mine is making noise ama just take out the belt

[@MikeBrown-td1ok]

No. Your belt goes to more than your A/c.

[@RMalai]

The "grinding noise" you have for all your videos at the beginning is the strongest grinding noise than any other. Please fix that. It is piercing into my ears that I also try to skip that. very annoying. Thank you very much. Now, let me watch the rest of the video.

[@ClayCrackingFun]

My car sounds like a whale if that makes sense it’s an 2017 Ford Fusion and I’m trying to locate the noise but it sounds like it’s coming from the hood

[@chrispayseur6913]

Bad advice. If the clutch isn't engaged the grinding isn't coming from the compressor itself. It's either the pulley or the clutch plate needs a spacer, you don't have to remove the compressor to fix this.