White smoke!!! X358 :(
#1
![Exclamation](https://www.jaguarforums.com/forum/images/icons/icon4.gif)
Hey guys,
I've been having a problem with my 09 X358 Super V8 this past month.
It seems on cold start ups I have white smoke coming out of the exhaust for 10 seconds or so.
This only happened on cold start ups, even on days where it is hot and humid here in Miami.
I went to 3 different mechanics, one being Jaguar dealer.
Non of them know what it is since the smoke does not smell sweet like coolant, burnt oil or burnt brake fluid.
The smoke smells like burnt PLASTIC!
![Icon Errrr](https://www.jaguarforums.com/forum/images/smilies/icon_errrr.gif)
I have been keeping an eye out on coolant and oil levels for about a month now and they are at perfect levels.
I changed the spark plugs and the old ones looked normal.
There are no signs of leaks underneath the carriage.
The only thing that comes to mind is that the 02 sensors or cats have gone bad and are making the car run super rich?
Any thoughts? Seen this before?
VIDEO attached...
Last edited by Miami XKR; 02-11-2016 at 01:52 AM.
#2
![Default](/forum/images/icons/icon1.gif)
How far are you driving on each trip ? White smoke is normally not smoke at all, but water vapour. Burning fuel converts the fuel to heat plus two main gases, carbon dioxide, and water vapour. If journeys are short, the water produced condenses on the exhaust pipes, and if the exhaust system doesn't get hot enough, can accumulate in the exhaust system.
White smoke can also be oil smoke, but it would definitely small of burning oil.
I don't think you have anything to worry about if the fluid levels are OK and the car runs perfectly.
White smoke can also be oil smoke, but it would definitely small of burning oil.
I don't think you have anything to worry about if the fluid levels are OK and the car runs perfectly.
#3
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The video indicates an issue, and is not simple catalyst steam. I would suspect it is being drawn in through the intake process. If it is coolant, and you use a silica based anti-freeze, you have already poisoned the O2 sensors. I would pull the plugs and do a good examination, and then do a cylinder leakage test, and I would also examine for oil or coolant in the intake manifold tract.
#4
#5
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It's possible you have multiple issues but the first step is to identify what is getting into the combustion process then start to track down where.
Cheers
34by151
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#9
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https://youtu.be/AR99yDSg1KI
Hey guys,
I've been having a problem with my 09 X358 Super V8 this past month.
It seems on cold start ups I have white smoke coming out of the exhaust for 10 seconds or so.
This only happened on cold start ups, even on days where it is hot and humid here in Miami.
I went to 3 different mechanics, one being Jaguar dealer.
Non of them know what it is since the smoke does not smell sweet like coolant, burnt oil or burnt brake fluid.
The smoke smells like burnt PLASTIC!![Icon Errrr](https://www.jaguarforums.com/forum/images/smilies/icon_errrr.gif)
I have been keeping an eye out on coolant and oil levels for about a month now and they are at perfect levels.
I changed the spark plugs and the old ones looked normal.
There are no signs of leaks underneath the carriage.
The only thing that comes to mind is that the 02 sensors or cats have gone bad and are making the car run super rich?
Any thoughts? Seen this before?
VIDEO attached...
Hey guys,
I've been having a problem with my 09 X358 Super V8 this past month.
It seems on cold start ups I have white smoke coming out of the exhaust for 10 seconds or so.
This only happened on cold start ups, even on days where it is hot and humid here in Miami.
I went to 3 different mechanics, one being Jaguar dealer.
Non of them know what it is since the smoke does not smell sweet like coolant, burnt oil or burnt brake fluid.
The smoke smells like burnt PLASTIC!
![Icon Errrr](https://www.jaguarforums.com/forum/images/smilies/icon_errrr.gif)
I have been keeping an eye out on coolant and oil levels for about a month now and they are at perfect levels.
I changed the spark plugs and the old ones looked normal.
There are no signs of leaks underneath the carriage.
The only thing that comes to mind is that the 02 sensors or cats have gone bad and are making the car run super rich?
Any thoughts? Seen this before?
VIDEO attached...
![](https://cimg4.ibsrv.net/gimg/www.jaguarforums.com-vbulletin/505x185/capture_b8798aea57fae689df0c24a3b03859141cbd61f0.png)
#10
![Default](/forum/images/icons/icon1.gif)
I suspect a brake master cylinder issue. Brake fluid leaking from the master cylinder is drawn into the vacuum power booster and on into the engine.
These leaks are so small that they are undetectable during normal driving but after the car sets overnight an accumulation of brake fluid causes the distinctive white smoke and unusual smell.
To verify you simply let the car sit overnight, disconnect and plug the vacuum line to the power booster and start the car. If no white smoke appears you have ID'ed the problem.
These leaks are so small that they are undetectable during normal driving but after the car sets overnight an accumulation of brake fluid causes the distinctive white smoke and unusual smell.
To verify you simply let the car sit overnight, disconnect and plug the vacuum line to the power booster and start the car. If no white smoke appears you have ID'ed the problem.
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