Never Clean Your Car’s Engine

  • Published on Apr 22, 2019
  • Engine bay detailing and cleaning. Never Clean Your Car’s Engine, DIY and car repair with Scotty Kilmer. How to clean an engine. How to wash your car's engine without damaging electronics or plastic parts. Engine cleaning explained. Why you should never pressure wash your car's engine. Why super cleaning your engine is not necessary. Car detailing. Car advice. DIY car repair with Scotty Kilmer, an auto mechanic for the last 51 years.
    ⬇️ Things used in this video:
    1. Engine Degreaser:
    2. UV Leak Dye (Don't use in AC system):
    3. UV Glasses and light:
    4. Cleaning brush:
    5. Common Sense
    Mechanic Monday Official Rules:
    1. The Mechanic Monday Giveaway will begin April 22nd at 7 am CST and run for six days, ending on April 28th at 9 am CST.
    2. There will be one winner of a few cans of engine degreaser valued at $30
    3. To enter, simply leave one non-offensive comment in the video below.
    4. Only one comment per entrant is allowed and more than one comment will not increase your odds of winning.
    5. Must be 18 years or old at the time of entering this giveaway OR have your parents’ permission.
    6. This giveaway is open worldwide.
    7. Any offensive, obscene, or lewd comments will be ineligible to win the giveaway.
    8. The odds of winning are based on how many people enter the giveaway.
    9. The winner will be chosen at random.
    10. The winner will receive a reply to their originally posted comment in the video and will also be announced in a newly posted comment by Scotty around Sunday 9 am CST. The winner will be required to respond to Scotty’s comment within 24 hours or their win will become void and a new winner will be chosen at random.
    11. The winner will be required to give Scotty their full name and mailing address to receive the prize.
    12. Entrants that use computers, programs, or any other means of cheating by adding additional comments through more than one account, will be ineligible to win the giveaway.
    13. Standard mailing time from the win date and the date received, will depend on the winner’s geographic location.
    14. This giveaway complies with all applicable federal, state, and local laws, rules, and regulations, including U.S. sanctions.
    15. Entrants that do not comply with TVclip’s Community Guidelines will be disqualified:
    16. This giveaway is in no way sponsored, administered, or associated with TVclip. Entrants are required to release TVclip from any and all liability related to this giveaway.
    17. Privacy notice: any and all personal data collected from the entrants and winner will only be used to announce the giveaway winner. The winner’s full name and address will only be used to mail the giveaway prize to the winner and nothing else. If you do not agree to these terms, then do not enter the giveaway.
    ⬇️Scotty’s Top DIY Tools:
    1. Bluetooth Scan Tool:
    2. Cheap Scan Tool:
    3. Basic Mechanic Tool Set:
    4. Professional Socket Set:
    5. Ratcheting Wrench Set:
    6. No Charging Required Car Jump Starter:
    7. Battery Pack Car Jump Starter:
    🛠Check out my Garage to see what I use every day and highly recommend:
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    This is the people's automotive channel! Learn how to fix your car and how it works. Get a chance to show off your own car on Sundays. Or show off your own car mod on Wednesdays. Tool giveaways every Monday to help you with your own car projects. Or enter your own DIY car fix to compete in the best fix of the week contest every Thursday. We have a new video every day! I've been an auto mechanic for the past 50 years and I'm here to share my knowledge with you.
    Here's our weekly video schedule:
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  • Autos & VehiclesAutos & Vehicles

Comments • 5 310

  • Scotty Kilmer
    Scotty Kilmer  Month ago +110

    ⬇️ Things used in this video:
    1. Engine Degreaser:
    2. UV Leak Dye (Don't use in AC system):
    3. UV Glasses and light:
    4. Cleaning brush:
    5. Common Sense

    ⬇️Scotty’s Top DIY Tools:
    1. Bluetooth Scan Tool:
    2. Cheap Scan Tool:
    3. Basic Mechanic Tool Set:
    4. Professional Socket Set:
    5. Ratcheting Wrench Set:
    6. No Charging Required Car Jump Starter:
    7. Battery Pack Car Jump Starter:

    🛠Check out the tools I use and highly recommend ►

    🔥Scotty Shirts and Merch ►

    Subscribe and hit the notification bell! ►

    Scotty on Social:
    Facebook ►
    Instagram ►
    Twitter ►

    • felix joy
      felix joy 21 day ago

      Scotty Thanks for sharing this inched been following your classes on my car for quite a while I have 4 cars and it works great you have good experience and I am glad to learn from you ...felix

    • Timber Wolf
      Timber Wolf 24 days ago

      What would you recommend to do with a muddy engine on a 4wd?

    • Gundam 00
      Gundam 00 25 days ago

      +phi No, you have to leave the engine running.

    • Sonya
      Sonya 27 days ago

      Great advice. Thank you, sir.

    • Travis Jones
      Travis Jones 28 days ago

      Where do I purchase the common sense?🤔

  • robert poppleton
    robert poppleton 11 hours ago

    scotty has brown eyes because he is full of himself anything to make a buck he must not work on them anymore just makes videos

  • norm merrill
    norm merrill 12 hours ago


  • Chai Cooper
    Chai Cooper Day ago

    A picnic inside the car hood... LoL 😁

  • Don O
    Don O 2 days ago

    30 years ago I used to have a V6 pontiac that has a dirty engine. This car overheats easily. One day I brought it to a car washing service that uses pressure washers. I then had a clean engine and the over heating problems disappear. I since then pressure wash my succeeding cars ever since.

  • Dan Uber
    Dan Uber 2 days ago

    Nice monday to you scotty.

  • wayne gambrell
    wayne gambrell 2 days ago

    I regularly pressure wash my engines with no problems at all. But don't over do it by constantly pressure washing too long in one spot and not on a hot engine and try to stay away from fuse /relay boxes.

  • Cesar Miranda
    Cesar Miranda 2 days ago +1

    I totally agree with you!!!
    Nice video!!!

  • Khaled Alharbi
    Khaled Alharbi 3 days ago

    What about just using compressed air?

  • Miguel Casas
    Miguel Casas 3 days ago

    Me and my dad use to always was are engine but always covered the electric part's

  • AH! Why is there poop in your mouth

    Rub Up Your Engines! 0:00 I would spray solvent on a rag and clean it that way.

  • mehnlo
    mehnlo 4 days ago +1

    How do cars or trucks go mudding through water without ruining alternator or getting hydro lock

    • gavin latendresse
      gavin latendresse 4 hours ago

      mehnlo that’s a bit of splish splash not a full on stream of water

  • JollitownGameplays
    JollitownGameplays 4 days ago

    I only clean the engine cover that has the V6 logo or 3.5 with the car logo with windex. That’s it.

  • Joe Manansala
    Joe Manansala 4 days ago

    Scott i can teach step by step in cleaning and detailing your engine in a safe and proper way.. whether it's air or water cooled engine, lol. Cheers!

  • Modern Vintage Lifestyles

    Next video: Never clean the inside of your car. Just throw everything to the back seat when the front passenger seat gets filled with trash.

  • Will Wong
    Will Wong 4 days ago

    Before I knew it, my one-time mechanic poured a bucket of water under the hood of my '84 V6 Camry and, about a few months later, my car stalled while going at about 60 km/h. Couldn't start it ever again and had to scrap my beloved Camry after that.

  • hardset2000
    hardset2000 5 days ago

    I don't recommend using a 3000 PSI pressure washer after using an engine cleaner/degreaser but washing it off with a garden hose and avoiding electrical parts, etc. is just common sense. Been doing this for over 40 years and no problems. Just can't stand a dirty, filthy engine compartment and feel better knowing I have it cleaned. (Runs better too)

  • hardset2000
    hardset2000 5 days ago

    My comment to my potential car buyer. "I never clean my car engine's compartment" Potential buyer's thoughts. "It looks like a pigpen and not way I'm going to buy this POS!" Trust me, clean car inside and out sell better than dirty cars.

  • Vito Lucci
    Vito Lucci 5 days ago

    Ahahahahaha I remember my friend washed his engine and we had to push his car back to his house from the car wash 😂😂

  • Austen McNeal
    Austen McNeal 5 days ago

    I worked at a car wash for a couple months years back. My boss would power wash engines all the time. Without asking or even telling the customers. He just didn't like dirty engines!

  • kostas focus
    kostas focus 6 days ago

    have same toyota motor,very annoying to see the dirty,if you protect some parts with plastic membrane no problem,but i prefer to wash the engine only in summer

  • Carlos Cera
    Carlos Cera 6 days ago

    Scotty I love your videos!!

  • Goon Squad Skateboarding

    Don’t rev up your pressure cleaners

  • isaac castillo
    isaac castillo 6 days ago

    Never clean unless you get free cleaner from Scotty lol

  • Basic Member
    Basic Member 6 days ago

    Chrisfixit says otherwise

    REGULATOR 733 6 days ago


  • keith pearson
    keith pearson 6 days ago

    My engine is spotless still runs great 😀😀😀

  • jin5632
    jin5632 6 days ago

    Pan the Organizer has left the chat

  • Matthew Valentin
    Matthew Valentin 6 days ago

    Hey Scotty big fan. Owning vehicles in NYC is a challenge to maintain but that degreaser would take car of detailing my 2010 spark metallic black er6n

  • Frooty Tooty
    Frooty Tooty 6 days ago

    Detailers gonna hate Scotty 😂

  • Death Reaper
    Death Reaper 7 days ago +1

    I've cleaned my engine once a year for the past 39 years, never had a problem

  • David Nudell
    David Nudell 7 days ago

    A clean engine will run just slightly cooler from the air heat transfer. The new cars are so good that I haven’t had a leak in 20 years.

  • Chris Reed
    Chris Reed 7 days ago

    I've owned 57 cars over the years and have cleaned each one many times with no trouble..With a clean engine I can see if I was to ever develop a leak and when I have to work on an engine, I can see where every bolt may be etc. I mainly do it for resale as a clean engine seems to just look more cared for than a dirty engine..dirty engine you just can't always tell what is a leak and what is old grease!! So I prefer a clean engine! Of course I do put a plastic bag over the alternator and know enough not to spray a harsh stream on any electrical areas as well as connectors..I think most newer cars are made to get some water on them from going through puddles anyway..It's the people that spray Tire Foam on an engine that have issues and the ones who use a high pressure wash on the engine...I use as little water as possible..

  • Pierre Ranger
    Pierre Ranger 8 days ago

    am sorry, but you are wrong. you should do a minimum of cleaning.

  • John Mehaffey
    John Mehaffey 8 days ago

    I was getting the cars underneath cleaned for its m.o.t it's a must for u.k cars and I asked the guy who owned the detailing shop did he power wash the engine and the answer was NO, he said with so many electrical components and with the e.c.u. it could really cause a lot of damage and even if I asked him to power wash it he always said no

  • Dominic W
    Dominic W 9 days ago

    Somebody wanted to spray water into my cars engine I was like hell no that’s so dumb! You’re gonna mess it up.

  • Edgardo Camarillo
    Edgardo Camarillo 10 days ago

    😂😂😂 unless you're planning on having a picnic😂😂

  • claymonlimon
    claymonlimon 10 days ago

    Maybe Scotty shouldn't use the words he used. If you know what you're doing, you can wash under the hood. I wouldn't let my mom or my son do it, but I understand what he means. Generally, most people don't need to wash under the hood.

  • John Ramey
    John Ramey 10 days ago

    I know so many people who use a power washer on the engine compartment. = /

  • Omega Beta
    Omega Beta 10 days ago

    That fan is scary wow.

  • r 7470
    r 7470 10 days ago

    Did he not say in an earlier video to use WD-40 for water in electronics

  • Fabian flores
    Fabian flores 10 days ago

    Cleaning your engine helps it run cooler.

  • Critter87
    Critter87 10 days ago

    My grandpa taught me this years ago. Only clean an engine when you’re trying to find leaks.

  • Mikey Tha Fsh
    Mikey Tha Fsh 11 days ago

    Cleanliness is next to Clamidiya. Look it up.

  • bradley benson
    bradley benson 11 days ago

    Love your vids

  • JD Spears
    JD Spears 11 days ago

    Iv yet to own a truc thats scared of water.
    In fact, here in the deep south a truc that caint go through 3ft of water is just a bath tub. I dont chrome my stuff up just to let it get covered in funk. That said, yes most engines are heat dispersed threw radiator but 2 inches of mud on the oil pan does zero good along with brakes, steering assy etc. I agree soaking engine and elec components with pressure is far worse than letting it be filthy but sometimes a little common sence comes into play when doing so...

  • Armando Rodriguez
    Armando Rodriguez 12 days ago

    Scotty, will you ever upload video bloopers? I'm sure have many funny moments. Thanks! Big fan and have learned lots from you.

  • Tito B
    Tito B 12 days ago +1


  • Sanel Šabanovič
    Sanel Šabanovič 13 days ago

    Well it's not that bad. Don't use water power hoses. Normal hoes with normal wather presure will do nothing. Cars are design to work in heawy rain. So when you drive 50 miles per hower and ther is heawy rain nothing will happen to engine.
    But is nice to take for a long ride after wash.

  • Aldo Moreno
    Aldo Moreno 13 days ago +1

    SCOTTY I use synthetic oil on my 04 Tacoma what do you think.

  • rANDOMdUDe
    rANDOMdUDe 13 days ago

    You must not have met cereal marshmallows....😁

  • Windmill Hill
    Windmill Hill 13 days ago

    Man, that new 4K camera really makes a difference!

  • V Tramell
    V Tramell 13 days ago

    I cannot agree with this one. In addition to making it easier to find leaks, a clean engine can save on potential repairs resulting from accelerated wear due to oil and grease getting on rubber hoses and plastic parts. There is also a safety factor. I have seen engines catch on fire because oil or transmission fluid had leaked onto the exhaust manifold. Also a clean engine helps with resale/trade-in value.

    • Damon Richter
      Damon Richter 11 days ago

      Oil and Greece doesn't hurt rubber hoses dude, brake lines have rubber lines and my oil intercooler is rubber

  • Robert Bronder
    Robert Bronder 14 days ago

    Scotty always to the rescue.

  • Michael Tobat
    Michael Tobat 14 days ago

    Well well now you know

  • praveer vikram
    praveer vikram 14 days ago

    I ve cleaned my engine bay with Collin spray in a yr or two. Worked out good.

  • mesamike85
    mesamike85 14 days ago

    Clean comment here. No prize needed though, car is new. Sorry, Scotty... I bough GM! GM for 18 years and not a single issue. Safe motoring!

  • Da Hy
    Da Hy 14 days ago +1

    Some Auto's Radio's Will lock out when the battery is radio...there goes $50.00 to re-code the radio...unless you have the radio careful...and parking your auto over the winter keep the battery from going dead cause the radio would lockout you...from the love...

    • Jack Burton
      Jack Burton 11 days ago

      I found a web site that gave me some codes for my 2010 civic in such a situation. Have it written down now. Google is your friend.

  • saleem Ahmad
    saleem Ahmad 15 days ago +4

    Scotty is right had a friend washed his BMW engine after a day later he needed a $ 3500 computer for the whole car

  • Allen Hampshire
    Allen Hampshire 15 days ago

    Hi Scotty, what a coincidence that this video should pop up . My son's Ford F150 has a dirty engine from living in the Deep country , running on dirt roads. It runs great, but dirty. Nothing leaking. I was hesitant about spraying the engine , because of the electronics. Seeing your video ....I am going to pass...I afraid I will damage something. God Bless, keith

  • Marcus Viscarra
    Marcus Viscarra 15 days ago

    Oil and grease breaks down any rubber in the engine bay, you have to clean the engine. If your engine bay has alot of grease and oil from leaks it can and will catch on fire there buddy. I have seen it plenty of times. Lately I have not been agreeing with you scotty. You have been saying alot of incorrect information lately like hondas VTEC system.

  • Awais Iqbal
    Awais Iqbal 15 days ago

    I get my car engine cleaned with gasoline detergent mixture and get it washed with jet wash. Try to avoid extra water inside and spray shorts bursts of jet

  • LoveThe PdMods50
    LoveThe PdMods50 15 days ago

    I have to wash mine...sorry

  • Cuong Hoang
    Cuong Hoang 15 days ago

    Is awesome lesion

  • Michael Wayne
    Michael Wayne 15 days ago

    Other engine cleaning videos claim to clean a warm engine. I’ve been told by a mechanic to clean my engine with it running. So many different ways. But yours makes the most sense. Thanks Scotty!

  • Balzinurgob01
    Balzinurgob01 16 days ago

    I used a compressed air-powered siphon wand with a strong degreaser solution and it messed up my throttle position sensor and now the engine idles like it's going 60 down the turnpike; Scotty's right--use caution around the electronics with harsh cleaners

  • Jor Jsen
    Jor Jsen 16 days ago

    Before when I always had old car I wash the engine, but I cover the electric with plastic and it works good. I like too see a clean motor and is danger have too much oil around the motor can start fire. Today when the engine and cars have been much better we don't see them so dirty.

  • Milinda Abeysinghe
    Milinda Abeysinghe 16 days ago

    Our cool guy has made another episode..💓💓💓

  • Korey Mayo
    Korey Mayo 16 days ago +2

    I've never had an issue after cleaning several different engine bays, but thanks for reminding me I need to do that because it's been a while!

  • John Beasley
    John Beasley 16 days ago

    50% of all engine wear is from dirt particles getting into the engine through the fuel, air, and oil. So if you want to destroy your engine faster don't clean your engine. My engines look about like new at 150,000 miles. Scotty is out to lunch. He is a pig.

  • Peter Garner
    Peter Garner 16 days ago

    I have always cleaned the engine and engine bay. If you know what you're doing then there's no problem. I clean it once a year as I find it enough. I use a cleaning rag on on the engine bay about every 2 or 3 weeks just to keep the bay clean, dust and pollen. I know anul but its me.

  • Ketz
    Ketz 16 days ago

    This is a clean and unoffensive comment.

  • 16 days ago +4

    The type of people who clean their engine bays regularly are the type of people who wash their car every week without waxing it, then wonder why their paint looks so dull all the time! 😆

  • Muhan C.A.
    Muhan C.A. 16 days ago +1

    Thanks Scotty!

  • Melissa Bahm
    Melissa Bahm 16 days ago

    This is why your Celica died...

  • alex tinoco
    alex tinoco 16 days ago

    Hello Scotty, can a head gasket leak cause the engine to hydro lock the engine?

    • Korey Mayo
      Korey Mayo 16 days ago

      Most definetly! That's why head gasket leaks have to be fixed right away!

  • Sebastian Lash Ayapana


  • ruffnred E
    ruffnred E 16 days ago +2

    I was just thinking should I clean my engine thanks for the info Scotty K

  • Jean Chinette Raymond
    Jean Chinette Raymond 16 days ago +3

    i have always kept my engine cleaned and never had a problem i like to keep my cars looking new

    • WorldGangWatch
      WorldGangWatch 14 days ago

      Jean Chinette Raymond with a pressure washer?

  • Barry Sadesky
    Barry Sadesky 16 days ago

    Im not saying he’s wrong; but at a detail shop I worked at for awhile we were taught to keep the vehicle running, suds up everything , rub down everything , and power wash off everything (except hood blanket).
    We had more issues starting cars back up that we had turned off to wash, we only ever had issues with a couple that we left running
    In both cases once you let it dry for 30-60 min they’re usually fine
    If possible let it dry before attempting to start it back up

  • Rustie Shackelford
    Rustie Shackelford 16 days ago

    As a former car detailer we always cleaned engine bays. Only exception was vw’s way to many sensors on those engines. If you own a vw never put water on the motor.

  • Christophe Valiant
    Christophe Valiant 16 days ago +1

    Thank you Scotty Kilmer 😗😗

  • Dracarys
    Dracarys 17 days ago

    Thatś bullshit...I used to cover the battery and the main electronic components with plastic bags and clean the motor regularly and NEVER got an issue.

  • Hashim Jamal
    Hashim Jamal 17 days ago

    Nicely taught!

  • harold vonhelms
    harold vonhelms 17 days ago

    thank you

  • Juan Matos
    Juan Matos 17 days ago

    Scott! My father is fixing his motor. It's a Mitsubishi Signo 2011 1.3. 150.000 km and he has never cleaned it, now I see the opportunity to do so, the motor is not currently under the hood. Should we clean it or leave it like that? I thought maybe the risk is reduced, after rinsing it won't be turn on after everything finished

  • Wilhelm Hesse
    Wilhelm Hesse 17 days ago

    "You don't live under here"😂😂😂

  • 5 Saber
    5 Saber 17 days ago +4

    It’s not stupid to clean your engine. I clean my engine all time with no problems.

  • John Avila
    John Avila 17 days ago

    I’ve never had issues with modern cars, maybe in the 70s or 80s

  • Zafar Sultana
    Zafar Sultana 17 days ago

    Thank you useful information

  • crazy train
    crazy train 17 days ago

    What do you think used cars places do, before they sell them? I much rather my engine bay be clean.

  • zudemaster
    zudemaster 17 days ago +1

    Two months from now Scottys video will be how to clean your car engine.

  • georgianborat
    georgianborat 17 days ago +1

    Scotty be like don't wash your engine.. and washes it :)

  • georgianborat
    georgianborat 17 days ago

    Ozzy Killer :)

  • Anthony Dempsey
    Anthony Dempsey 18 days ago

    A little careful engine cleaning is a part of maintenance.

  • Anthony Dempsey
    Anthony Dempsey 18 days ago

    Don't clean your face either!

  • Junior Sarpong
    Junior Sarpong 18 days ago

    I was thinking of cleaning my cars engine but “hey you don’t live here!”

  • Robert Owens
    Robert Owens 18 days ago

    Clean, non-offensive comment.

  • Roger Anglin
    Roger Anglin 18 days ago +3

    A lot of the products do say to use on a warm engine, however, I trust Scotty over them.

  • Osama Razzaq
    Osama Razzaq 18 days ago

    Thank you for the informations.