Question about exhaust smoke
#1
Question about exhaust smoke
Went to a road course for the first time on Sunday. After about 10 laps the car started smoking bad from the exhaust. The smoke was thick and white. There were professional drivers present (driving school) as well as a lexus service manager there looking at the car after the run. The smoke was thick but without that sweet smell of coolant. This was the hardest the car has ever been run but also maintained normal oil and coolant temperatures. After a bit of resting the smoke cleared up and never came back, my drive home was 2 hours long and car still seems ok. Engine sounds good, oil very clean, what could it have been? I have no cats so its going to be more obvious than normal.
#2
Interesting. Assuming you did not lose any fluids (oil/coolant); could it be an accumulation/pooling of condensation or water within the exhaust?
Oder-less white smoke sounds like water burning off..but the fact that it is thick white smoke would mean a lot of water.
Oder-less white smoke sounds like water burning off..but the fact that it is thick white smoke would mean a lot of water.
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#10
What was the temperature outside on your track day?
......may have increased condensation.......but I'm no automotive engineer.
I thought....for every liter of fuel burned, the same amount of water is produced.
Digger08
......may have increased condensation.......but I'm no automotive engineer.
I thought....for every liter of fuel burned, the same amount of water is produced.
Digger08
#11
maybe similar to this in some sort of way
Last edited by Compthis; 11-08-13 at 12:24 PM.
#12
I just wanted to see if anyone really did figure out the smoking. I have auto-crossed the car a few times and it's happened to me multiple times in every whether from 100 degrees to 45 this past weekend. There's a LOT less if you let the car idle for about 5 minutes afterward.
This past weekend it didn't even happen right away. I let the car idle and it was fine, then we headed to Wendy's where I may have hit the throttle a few times on the way and after leaving Wendy's it happened.
This past weekend it didn't even happen right away. I let the car idle and it was fine, then we headed to Wendy's where I may have hit the throttle a few times on the way and after leaving Wendy's it happened.
#13
I just wanted to see if anyone really did figure out the smoking. I have auto-crossed the car a few times and it's happened to me multiple times in every whether from 100 degrees to 45 this past weekend. There's a LOT less if you let the car idle for about 5 minutes afterward.
This past weekend it didn't even happen right away. I let the car idle and it was fine, then we headed to Wendy's where I may have hit the throttle a few times on the way and after leaving Wendy's it happened.
This past weekend it didn't even happen right away. I let the car idle and it was fine, then we headed to Wendy's where I may have hit the throttle a few times on the way and after leaving Wendy's it happened.
#14
Just like a few others mentioned, if the color was white its either water or coolant.
Best thing to do, is to check your oil to see if there was any contamination from coolant or water that leaked in. If you don't see anything, you're probably ok, only when you have excess white smoke all the time, would it be an indication that your head gasket is leaking.
Hope that helps!
Best thing to do, is to check your oil to see if there was any contamination from coolant or water that leaked in. If you don't see anything, you're probably ok, only when you have excess white smoke all the time, would it be an indication that your head gasket is leaking.
Hope that helps!
#15
I'm no even worried about damage. The engine is fine, and it's noting like a gasket. My thought is it's something like the scavenge pump for the heads not keeping up when you get the engine really pushing its limits. this could cause oil leaking in through the valves and on start it burns off the oil. It's got to be something like this I was just wondering if anyone actually figured it out yet.