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Old 02-16-2003, 03:58 PM
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Question White Smoke

I was just wondering is it normal if there's like alot of white smoke coming out of the exhaust even though you've been driving constantly for like hour? Anh everytime i hit the gas peddle to pass someone, it look like there extra smoke coming out. Thanks...
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Old 02-16-2003, 04:07 PM
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Now, most likely, that is evaporation you are seeing, cold air warm exhaust effect, which is normal. Is it really thick and white or is it closer to regular evaporation? Does it have a strange pungent stech besides the usual gasoline exhaust smell?
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Old 02-16-2003, 04:18 PM
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that doesn't sound right if your car is smoking after an hour of driving. check to see if you are leaking oil. if no leaks check the oil level to see if you are burning it. then take it to you dealer to have it looked at.
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Old 02-16-2003, 04:48 PM
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white smoke = condensation.... hot air passing over a cold surface... evaporates fast.

thick white smoke with a sweet tasting smell = antifreeze burning. Huge difference... This smoke wont dissapate fast. It will linger around like fog for quite a while.
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Old 02-16-2003, 04:52 PM
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Like bruncek said, heavy white smoke is usually antifreeze burning, and is most often the result of a blown head gasket. But you would be overheating if that were the case, so I wouldn't think that was it.
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Old 02-16-2003, 08:41 PM
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That is typically a blown head gasket! That's when coolant is entering the combustion chamber. That's not a good thing b/c it can do major damage to your engine or even seize.
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Old 02-17-2003, 04:17 PM
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I was thinking about broken head gasket too. But if that really the case, aren't i suppose to be filling coolent like drinking water? Cause for the pass 9 month, the coolent tank is still full... So should i not worry about it cause the weather is to cold or should i bring it to the dealer???
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Old 02-17-2003, 04:55 PM
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Yes, you would be adding coolant and/or overheating. Another sign would be milky oil.
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Old 02-17-2003, 05:23 PM
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Quote:
Originally posted by UpTech2K2
I was thinking about broken head gasket too. But if that really the case, aren't i suppose to be filling coolent like drinking water? Cause for the pass 9 month, the coolent tank is still full... So should i not worry about it cause the weather is to cold or should i bring it to the dealer???
I live in CA and if I was driving my car for over an hour and white dense smoke still comes out, I would worry about it. So your saying your coolant is not an issue then maybe it's the weather and the condensation that's causing that effect.
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Old 02-17-2003, 08:48 PM
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yea i have the same problem. no matter what the weather is or how long i've been driving, i have the white smoke coming out of my pipes. but it smells like just normal exhaust. only some of us have this problem?
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Old 02-17-2003, 09:00 PM
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Its evaporation.
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Old 02-17-2003, 09:09 PM
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Here was how it was explained to me! The OEM exhaust has a bypass flap so when you hit the gas the bypass opens up allowing exhaust to pass more freely. What happens is that the water gets trapped there so when you hit the gas the bypass opens dumping condensation out over the hot part of the muffler, hence the condensation out the tail pipes. Mine does it all the time now that it's cold. Once the car is warm it should only do that when you accelerate. I like tapping the gas on the highway and see it puff the pipes!

Another way to see it is entering a highway when the engine has just made it to operating temp. Bring the car up to 40 then accelerate in 3rd gear slowly. As you bring the rpms up slowly usually the right pipe opens first. Tap it a little harder you'll see the left pipe open too and blow condensation out.
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Old 02-18-2003, 12:08 AM
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Altimaxnh, Please correct me if my wrong, but I believe your thinking of the Maxima exhaust. Ours is different, there is no flap.
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Old 02-18-2003, 01:12 AM
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Umm isnt that normal ? My car and all the other cars on the road that I have EVER seen has white smoke coming out of it in the winter time when they accelerate. I believe thats normal, when its cold outside dosnt white air/smoke come out of your mouth, Are you broken, is your head gasket broke ? I think its just heat .
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Old 02-18-2003, 01:12 AM
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Quote:
Originally posted by altima2003-3.5
Altimaxnh, Please correct me if my wrong, but I believe your thinking of the Maxima exhaust. Ours is different, there is no flap.
Only the 2.5 has the flappy thing.
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