sorry to write up another thread on this but i need help ...upon starting alot of white smoke comes out the exhaust for about 10-15 seconds after that car drives fine no problems at all when i leave the car parked for a few hours or over night again it happens ...i read so many threads on this topic im more confused now then when i started ....should i replace the aos or head gasket or valve guide ....i went to a mechanic and he told me it would be a 4 to 5 thousand dollar job ..no sure if because he saw it was a porsche but i almost had a heart attack ....im located in nyc if anyone has a good mechanic ....thanks jay
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