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Smoke at high RPM only OIL LEAK?

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I have a 99 cab. At high RPMs it smokes like a train. I have found it to be some sort of oil burn on the outside of the # 1 header pipe. I have had a friend verify it is not coming out of the exhaust pipe, but rather around the exhaust, the way he determined this was he "tried" to follow me closely and watch. It is like it is leaking oil at high pressure. Could it be coming from either around the # 1 coil or possibly the sleeve that contains the # 1 coil. My assumption from replacing a coil my self is that oil circulates around those sleeves. Reason I beleive this is because I pulled a sleeve out by mistake on the # 6 cylinder when putting a new coil in. I have not verified any of this info so any and all help would be appreciated. If there is a porsche mechanic out there that is willing to help out a "shade tree" mechanic like myself I would be ever so greatful.

Thanks George

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