White Smoke from Exhaust on Startup then Goes Away: 5 Common Causes

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  • Опубліковано 12 гру 2024

КОМЕНТАРІ • 79

  • @gmsstrive2bsaved781
    @gmsstrive2bsaved781 4 дні тому +1

    2008 camry does this regardless of weather. Not on every start but pretty frequent. Lots of white smoke upon start but goes away after 5,10 seconds drives fine after ..no smoke

  • @colebarclay7991
    @colebarclay7991 8 місяців тому +9

    I have a 92 mitsubishi gto that when u rev it without moving it blows a small bit of white smoke out, but while moving nothing?
    And ideas

    • @louvictorino8148
      @louvictorino8148 2 місяці тому

      Does the smoke constantly come out when reving it? If it is then it could be oil going past the rings. Maybe time for a rebuild. If your coolant is low or disappearing then it could be a head gasket

  • @ItsNewToast
    @ItsNewToast 2 місяці тому +2

    I have a st225 and on a cold start perfectly fine, the usual condensation mist and that’s about it, however when the car is warm and turned off, left for 10-15 mins, when starting the car again it smokes a thicker white for 5 seconds and then disappears, any thoughts on this cause ?

  • @medzid7525
    @medzid7525 3 місяці тому +6

    I got a diesel fiat stilo 2007, it has issues starting in the morning ( takes 3 to 4 seconds to start) and then a bit of white smoke comes out. Later during the day car turns on normally and no white smoke is produced

  • @rodman410
    @rodman410 5 місяців тому +11

    My son's 2020 fusion had a few seconds of thick white smoke on start-up, but this was after 4 days of no start-up. And it hasn't done it since then. We just bought it used, so just looking for a little peace of mind that everything is okay and it was probably condensation? Thanks.

    • @void0350
      @void0350 3 місяці тому

      what happendß

  • @compaq4810
    @compaq4810 10 місяців тому +6

    On my Suzuki Baleno only during cold starts there is a cloud of smoke that dissappears after a second . There is zero smoke after that . This happens only during cold start and it’s happening everyday

    • @Spazzowhirl11
      @Spazzowhirl11 3 місяці тому

      Same thing for me, did you find a solution? Is it still doing it?

    • @will_dikfit2975
      @will_dikfit2975 2 місяці тому

      Same on my 2010 bmw 750li, with brand new engine from factory, no fluids dissappear so I have a peace of mind

    • @bigloaftv6244
      @bigloaftv6244 15 днів тому

      ⁠@@will_dikfit2975may be burning from inside. I have an Altima with issue burning oil no leaks, only on cold start it smokes on startup for like 3 mins

  • @marylamb6063
    @marylamb6063 10 місяців тому +5

    I have a 1999 Firebird that "smokes" moderately out of the exhaust when the weather is cold. It goes away when the car idles 15 minutes. Is this normal?

    • @HonestMechanicChannel
      @HonestMechanicChannel  10 місяців тому

      Hi, Yes, moderate exhaust smoke on cold starts can be normal, often just condensation evaporating. If the smoke is white and disappears as the car warms up, it's likely not a concern. However, if it persists or is blue or black, have it checked for potential issues.

  • @leonidaspantilano1021
    @leonidaspantilano1021 23 дні тому

    I have 2014 Ford Ranger 2.2 xlt. When i start a car huge amount of white smoke came out from exhaust.after a how many seconds it disappeared. But i observed the engine oil is go empty. I have 3times to refill lube oil.what could be the reason?

  • @xkaysayyx
    @xkaysayyx 8 місяців тому +1

    What about white smoke at startup, regardless of whether it’s 90 degrees out or 20 degrees out, and it smells like burnt rubber? Doesn’t smell sweet whatsoever. What could that be? 2020 Ford Explorer. Service department at Ford couldn’t diagnose it but it’s been 7 months now and I hate that it does this. 😅

    • @HonestMechanicChannel
      @HonestMechanicChannel  8 місяців тому

      Hi, other than that is the vehicle running fine and how long does it typically last? White smoke at startup, regardless of outside temperature, accompanied by a burnt rubber smell in your 2020 Ford Explorer could be caused by a leaking valve cover gasket,Since the Ford service department hasn't been able to diagnose the problem, consider seeking a second opinion from an independent mechanic specializing in Ford vehicles for a more thorough diagnostic process and appropriate repairs.

    • @quinsmama09
      @quinsmama09 7 місяців тому +1

      I have a 2020 pathfinder and mine does this too! Doesn't matter the weather outside. Doesn't do it every time I start it, but frequently. Also has a burning rubber smell. I take mine to Nissan and they said possible sludge. Just wondering if there is any other ideas.

    • @vanessamoreno2588
      @vanessamoreno2588 6 місяців тому

      @@quinsmama09my 2018 pathfinder is doing the same. Took it to get fixed but it’s still doing the same thing.

    • @axelrivas2914
      @axelrivas2914 5 місяців тому

      @@quinsmama09 did you know what was the problem mine 2019 have a similar situation

  • @johnmartin5153
    @johnmartin5153 8 місяців тому

    does the condensation in the exhaust rust the exhaust baffles inside if the vehicle sits for a week or two?

    • @HonestMechanicChannel
      @HonestMechanicChannel  7 місяців тому +1

      Yes, condensation in the exhaust system can contribute to rusting of Hi, the exhaust baffles and other internal components if the vehicle sits for an extended period, like a week or two. This happens because when the vehicle is not used regularly, the moisture from condensation doesn't get a chance to evaporate fully, as it would during regular driving when the exhaust system heats up. Over time, this trapped moisture can lead to corrosion and rust, particularly in climates with high humidity or during colder weather when condensation is more prevalent. Regular use of the vehicle and ensuring the exhaust system is in good condition can help minimize these effects.

    • @johnmartin5153
      @johnmartin5153 7 місяців тому

      @@HonestMechanicChannel awesome thanks !

  • @mbengissimon444
    @mbengissimon444 9 місяців тому +1

    It happens on my car only if i drive with high rpm like 100 or 120 kmph the following morning it blows excessive smoke for 10 seconds and dissapears my exhaust is clean and also drops some water
    I suspect pcv valve ?

    • @HonestMechanicChannel
      @HonestMechanicChannel  9 місяців тому +1

      Hi, White smoke from the exhaust, particularly after driving at high RPMs and then experiencing excessive smoke the following morning, can indicate moisture or coolant burning off, which may not be directly related to the PCV valve. The PCV (Positive Crankcase Ventilation) valve helps relieve pressure from the engine's crankcase and prevents oil from being blown out. If faulty, it can lead to oil leaks or oil burning, which typically produces blue smoke rather than white. White smoke is more commonly associated with coolant entering the combustion chamber, possibly due to a head gasket failure, cracked engine block, or a cracked cylinder head. However, if you're also noticing water dripping from the exhaust, this can be a normal byproduct of combustion, especially in cooler weather, as the exhaust system condenses moisture in the exhaust gases. For an accurate diagnosis, a thorough inspection by a mechanic is recommended, as they can check for coolant leaks, head gasket integrity, and the condition of the PCV valve.

  • @natoshiasmith1091
    @natoshiasmith1091 2 місяці тому +1

    I have a 98 Toyota Avalon XLS, bought 5mo ago from a friend who kinda ran her down. So shes a rescue 😂. Runs strong. But occasionally not every time and not always on a cold start and dont really matter the temp. When i start it a thick cloud of white smoke will come out for about 10-20sec before it starts to clear out and none once im moving. It also usually smells more burnt than anything. Not sweet imo. My belts tend to squeel on start too for a few seconds randomly also. Idk if thats related or not. Sometimes they dont stop squeeling til i switch into drivr though. It is an automatic. Just trying to weed through all the minor issues. I think i need a thermostat too because my heat dint work and the temperature gauge drops a lot. Could that be contributing to any of these issues? She has 281k miles on her shes a trooper and still strong so just trying to nip these things in the but before it effects performance

    • @Lefteriskaroutsos
      @Lefteriskaroutsos Місяць тому

      Same for me… it seems that my thermostat is stuck on the open position. Can this be related ?

  • @stuartnewman6968
    @stuartnewman6968 11 місяців тому +37

    It's just condensation from the cat when you start your car up when it's cold. assuming it goes away, it's just the engine warming up. Worst it will be is egr something like that. Don't be scaremongered into something it's not people.

    • @HonestMechanicChannel
      @HonestMechanicChannel  11 місяців тому +3

      I agree with you 100%. No need to panic

    • @rapsheet2409
      @rapsheet2409 11 місяців тому +1

      Appreciate this alot though my gtp was dieing on me

    • @seanrobinson6407
      @seanrobinson6407 5 місяців тому +2

      Cats are so mischievous. Mine often jumps on me on the couch while I am sleeping, looking for me to give her treats.

    • @raymondbotha3675
      @raymondbotha3675 5 місяців тому +1

      I started getting white smoke whwn i deleted my cat , gone when its hot , actually smells a bit like a rich fuel mixture which i presume is used to heat the cat uo fast at startup

    • @seanrobinson6407
      @seanrobinson6407 5 місяців тому

      @@raymondbotha3675 Make sure to provide fresh water in a bowl for your cat.

  • @suryarana3475
    @suryarana3475 11 місяців тому +3

    Hello , when I start my car huge amount of white smoke came out from exhaust but after 10-15 minutes it disappeared . There is no engine oil leak and coolant is also fine what could be the reason? This happened in winter , also lot of water coming from exhaust.

    • @HonestMechanicChannel
      @HonestMechanicChannel  11 місяців тому +1

      Hi there it might be condensation since it happened when it was cold. are you still experiencing this?

    • @suryarana3475
      @suryarana3475 11 місяців тому +2

      @@HonestMechanicChannel yes , but when I drive regularly there is no smoke coming from exhaust but when I drive once or twice in week it happened. Is it fine??

    • @EddySanchez-rl5iq
      @EddySanchez-rl5iq 10 місяців тому +1

      @@suryarana3475how’s your gas millage it could be a faulty injector

    • @west11521
      @west11521 7 місяців тому

      If this happens will the car be able to pass smog test?

    • @stevehunt3847
      @stevehunt3847 6 місяців тому

      Hi I have same problem on my x3 2006 turbo diesel I found oil in the charge intake pipe and oil on the butterfly intake manifold any ideas

  • @BRobinson28
    @BRobinson28 8 місяців тому +2

    I have a 2011 Nissan armada it only does it on start up for 20 seconds

    • @HonestMechanicChannel
      @HonestMechanicChannel  8 місяців тому +1

      Hello, if this also happens when the outside temperature is hot/warm, I would say, the valve stem seals are going bad, allowing a small amount of oil to leak into the combustion chambers. This oil burns off during startup, causing the white smoke. If the smoke clears up quickly and doesn't reappear during normal driving, it's likely not a serious issue.

    • @TheTribalgame
      @TheTribalgame 4 місяці тому

      ​@HonestMechanicChannel mine does that as well. I just got an oil change and now it's doing it more consistently.

  • @destintosell5548
    @destintosell5548 5 місяців тому +2

    My engine has a small knock along with the white smoke. If i rev the engine the ticking gets faster and the smoke gets thicker. Once the engine is at opetating temp the noise and smoke quits. This only happens when it is lower than 60°F outside.

  • @mikeking9777
    @mikeking9777 4 місяці тому +1

    Which of these are more likely to throw a code?

  • @west11521
    @west11521 7 місяців тому +2

    If smoke stops within the first min or two will the car be able to pass smog test with this problem?

  • @EBraz
    @EBraz 10 місяців тому +11

    When i start my car. A huge amount of white smoke comes out, but it disspears in like 10 seconds. Im assuming that's fine?

    • @uo614
      @uo614 6 місяців тому +2

      The same thing happens with my 1990 camaro. I'm trying to find answers and hope it's not a head gasket

    • @abhimantravelsmoodabidri
      @abhimantravelsmoodabidri 6 місяців тому

      My honda pilot 2010 petrol when start coming smoke and when star long time waiting on signal that time coming more smoke what is the problem plz inform me thanks

    • @EBraz
      @EBraz 6 місяців тому +2

      Huge update: My car is fucked, there's oil in the engine. That's what I get for buying a Ford, lol.

    • @caitlingray3020
      @caitlingray3020 6 місяців тому +2

      @@EBrazmy ford edge sport is doing the same thing. Ford dealership garage isn’t able to figure out the cause of it. What was your diagnosis?

    • @EBraz
      @EBraz 6 місяців тому

      @caitlingray3020 It tuned out there was oil in my engine. Idk how when I always kept up with its maintenance. I'm planning on buying a new car. Maybe a Lexus

  • @donniebrasco4114
    @donniebrasco4114 4 місяці тому

    This happens in my 87 Camaro but only when it’s parked on an angle. Exhaust pointed up. I turn it on a puff of white smoke comes out then immediately goes away.

  • @TheTribalgame
    @TheTribalgame 4 місяці тому +1

    I have a 2017 nissan and i just got an oil change. This happens after i i park it. No signs of a leak. No overheating

    • @carlosnoriega1209
      @carlosnoriega1209 3 місяці тому

      No way I have a 2016 q50 and mines been doing the same

  • @abhimantravelsmoodabidri
    @abhimantravelsmoodabidri 6 місяців тому

    My honda pilot 2010 petrol when start coming smoke and when star long time waiting on signal that time coming more smoke what is the problem plz inform me thanks

  • @ilseenriquez9227
    @ilseenriquez9227 5 місяців тому +6

    Why does this happen on a 98degree day?
    And I had already drove it for atleast 20 miles

    • @Forte-f9u
      @Forte-f9u 5 місяців тому +1

      That happened today to me but I also had the AC on

    • @zaeee_4x736
      @zaeee_4x736 5 місяців тому

      Literally happened to me today in my maxima

  • @jflip6k
    @jflip6k 3 місяці тому

    1.9TD AAZ VW engine. Smokes white when accelarating at more than 2k rpm when COLD. After about 20/30min driving it goes away. What could it be?

    • @jflip6k
      @jflip6k 3 місяці тому

      Btw its an engine from 1996. No ECU. Just old mechanical diesel

  • @murz_gsn
    @murz_gsn 9 місяців тому

    Hello my bmw m20 is bringing out white smoke when start up in the morning

    • @HonestMechanicChannel
      @HonestMechanicChannel  9 місяців тому

      Hi, does the smoke go away when driving? only happens in the morning?

    • @tonchodimitrov9520
      @tonchodimitrov9520 8 місяців тому

      Hi i have the same problem on BMW E90 white smoke when start up from cold and rpms are playing /like engine shaking for a few seconds/until warms up and smells of unburned diesel. Once warm all the smoke disappears.

    • @shaunt7069
      @shaunt7069 4 місяці тому

      ​@tonchodimitrov9520 probably a glowplug if it doesn't smoke and smell like diesel after the engine is up to temp

  • @oneshot3216
    @oneshot3216 3 місяці тому

    My Toyota Solara has smoke come out for about 3 seconds and has been doing it for 70k miles. Runs great so I'm assuming it's nothing major. 😆

  • @PrayItWorks1
    @PrayItWorks1 5 місяців тому

    Got 1998 rav 4 and start up the smoke is insane

    • @HonestMechanicChannel
      @HonestMechanicChannel  5 місяців тому

      Hi. generally reliable cars! Is the white smoke thick/thin?

    • @PrayItWorks1
      @PrayItWorks1 5 місяців тому

      @@HonestMechanicChannel thick smoke I’m gonna buy stop smoke and see if it works. But maybe there’s to much oil in the car

  • @seeharvester
    @seeharvester 11 місяців тому +1

    Another cause could be diesel fuel in a gasoline engine.
    I once poured 5 gallons of gas in my out-of-gas truck from a container that had been used to fuel diesel tractors.
    It must have had a minute amount of diesel left in it, because the truck smoked like a chimney till it was flushed through with a fill up.

  • @ClovisBarclay
    @ClovisBarclay 4 місяці тому

    What's a sweet smell like chocolate

    • @HonestMechanicChannel
      @HonestMechanicChannel  4 місяці тому +1

      Hi, Normally caused by a coolant leak. Check my latest video this topic. ua-cam.com/video/U8yNaF6RtBk/v-deo.html