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Car blowing out smoke after going down a hill and you press the trottle to go up another .Only then does it do it otherwise the car drives perfect. Is it valve seals piston ring or something else the car is a 1.4 golf petrol 1999 THANKS FINTAN

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That is usually a sign of worn valve stems/guides or seals.
When you take your foot off the accelerator going down hill you effectively close the throttle, the vacuum pressure created in the inlet manifold will open the throttle slightly and the vacuum will look for "inlet" from anywhere it can and one of these places is down the sides of worn valve stems/guides, it will **** a small amount of oil down the valve guide and the oil burning off when you put your foot back on the accelerator is the smoke you see out of the exhaust.

Posted on Aug 10, 2008

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