The smoke looks more white than blue but i have only noticed it when backing off the throttle or coasting while in a low gear, and when i do this there is usually a vacuum on the turbos. Is it possible for fluids in the turbos leaking past a gasket or something? Guess im being too paranoid, since i just got it.
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Thanks that made me feel so much better about this, hehe i was getting stressed. I will say that it probably gained a good 20hp from dropping oem exhaust especially at high rpms. Has anyone attempted on doing the valvle seals themself? According to mkiv.com it looks pretty simple.cord4530 said:Nice looking car, and great color
Valve seals tend to leak most in two situations.
1) At startup if car has been sitting a few hours or more
2) At high vacuum in cylinder
When the car idles for a bit then you step on the throttle, that's a time when bad valve seals are likely to let oil in to the combustion chamber.
The color of smoke is pretty blue, so I'm fairly certain it's oil burning, not water/coolant (white) or too rich a fuel mixture (black).
In general (smoke or not) running w/o a cat is going to produce more smell. A side note...the cat converters need to be fairly hot before they actually start doing much. At cold start, they shouldn't cause any more or less smoke than no cats at all. Cat light-off time varies from car to car, but generally after a minute or less of driving, most cats are functional. Some newer cars have functional cats after under 25 seconds of idling!
To feel better, you may consider putting the stock cats back in place and watching what happens. Maybe take a baseline performance measurement on your car how it is now, and how it is with stock cats. You may be suprised what you find.
What is he suppose to measure? Also, I don't see anything about whether he was stone cold or warmed-up. The only thing we know is smoke on rising intake vacuum. The cats and silencer can baffle the smoke and increase the residence time of the emissions and help to burn-off some of the particulate (when up to temperature). Rather than conduct some experiment, why not just install the Random new-style close-coupled cat and rid yourself of odor and excess emissions that nobody seems to care about and get a little performance bump too.cord4530 said:Nice looking car, and great color
Valve seals tend to leak most in two situations.
1) At startup if car has been sitting a few hours or more
2) At high vacuum in cylinder
When the car idles for a bit then you step on the throttle, that's a time when bad valve seals are likely to let oil in to the combustion chamber.
The color of smoke is pretty blue, so I'm fairly certain it's oil burning, not water/coolant (white) or too rich a fuel mixture (black).
In general (smoke or not) running w/o a cat is going to produce more smell. A side note...the cat converters need to be fairly hot before they actually start doing much. At cold start, they shouldn't cause any more or less smoke than no cats at all. Cat light-off time varies from car to car, but generally after a minute or less of driving, most cats are functional. Some newer cars have functional cats after under 25 seconds of idling!
To feel better, you may consider putting the stock cats back in place and watching what happens. Maybe take a baseline performance measurement on your car how it is now, and how it is with stock cats. You may be suprised what you find.
