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

White Smoke from Exhaust on Startup then Goes Away: 5 Common Causes
In this video I will go over the leading causes of white smoke on a car exhaust (tailpipe) that happens on startup but goes away as your engine gets warm.
This video is your one-stop solution to understanding the nuances of what causes white smoke when starting a car
What You Will Learn:
1. White Smoke from Tail Pipe: We start by exploring the common reasons behind white smoke from the tailpipe. This segment is crucial for identifying whether the smoke is a harmless byproduct of temperature changes or a symptom of a deeper issue.
2. White Exhaust Smoke Petrol Engines: Delve into the specifics of petrol engines and why they might emit white smoke. We cover a range of causes, from condensation to more serious concerns like oil leaks.
3. White Exhaust Smoke Diesel Engines: Diesel engines have their quirks, and we discuss how and why white smoke may be emitted from diesel vehicles, emphasizing the differences from petrol engines.
4.Troubleshooting and Diagnosis: Armed with practical tips and tricks, we guide you through diagnosing the issue in your vehicle. This part is crucial for those who wish to understand the severity of their car's condition.
5.Expert Advice and Solutions: We provide professional solutions and preventative measures to tackle the problem of white smoke from the exhaust.
Throughout this Video:
We'll address the various types and characteristics of white smoke and what they can indicate about your vehicle's health.
Understand the difference between normal and concerning white smoke emissions.
Learn about the different components in your vehicle that can contribute to this issue, including the role of the head gasket, cylinder head, and more.
Car Owners experiencing white smoke issues.
1. DIY Enthusiasts looking to broaden their automotive knowledge.
2. Individuals considering purchasing a used car and wanting to make informed decisions.
If you find this video helpful, please subscribe and share ‪@HonestMechanicChannel‬
Disclaimer:
This content is for educational purposes and should not replace professional advice. As an experienced mechanic, I aim to provide helpful insights, but I'm not liable for any damage or issues arising from the application of this information. Always consult a qualified mechanic for specific vehicle needs. Viewer discretion and responsibility are advised.

[@colebarclay7991]

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

[@rodman410]

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.

[@compaq4810]

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

[@abhimantravelsmoodabidri]

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

[@west11521]

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

[@marylamb6063]

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]

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.

[@mbengissimon444]

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]

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.

[@suryarana3475]

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]

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

[@suryarana3475]

@@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]

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

[@west11521]

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

[@stevehunt3847]

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

[@ilseenriquez9227]

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

[@user-zo9ld9jo2q]

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

[@zaeee_4x736]

Literally happened to me today in my maxima

[@johnmartin5153]

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

[@HonestMechanicChannel]

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]

@@HonestMechanicChannel awesome thanks !

[@seeharvester]

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.

[@HonestMechanicChannel]

100% a common mistake as well. Thanks for your input

[@EBraz]

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]

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

[@abhimantravelsmoodabidri]

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]

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

[@caitlingray3020]

@@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]

@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

[@xkaysayyx]

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]

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]

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]

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

[@BRobinson28]

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

[@HonestMechanicChannel]

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.

[@murziimane5244]

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

[@HonestMechanicChannel]

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

[@tonchodimitrov9520]

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.

[@stuartnewman6968]

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]

I agree with you 100%. No need to panic

[@rapsheet2409]

Appreciate this alot though my gtp was dieing on me

[@seanrobinson6407]

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

[@MONDATRACK]

Got 1998 rav 4 and start up the smoke is insane

[@HonestMechanicChannel]

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

[@MONDATRACK]

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