Alternative cause to white smoke out of exhaust?

[Thunderskull]

That's a good description of coolent in your exhaust. I'm still saying you might have a problem with the headgasket. If you are blowing coolent out of your exhaust, then there is no other way it could be getting there other than a blown headgasket or a crack in the block. The reason we mentioned the turbo seals is because sometimes oil smoke can be mistaken for coolent smoke on the visual, and if you had a bad turbo seal then the oil would leak right into your exhaust. But, from your description it sounds like coolent. Get a compression test done. I thought you'd done that, but through reading all the posts, it sounds like you haven't. It's a lot easier than pulling the head. If the compression test comes up with nothing, then you might want to pull the head. You can buy the tool to test your compression at autozone for around $25.

 

[Eclipse96Ryder]

if it smealt sweet then its the headgasket...


if your boosting the 420a then their is definately a good chance it can be the headgasket, and everything ur describing sounds like the headgasket