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m56 m54 retrofit
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  1. E46 General
    Just completed the valve cover swap, drove the car for a day and a half with no issues. Then all of a sudden I have an engine light. M56 valve cover no obvious vacuum leaks when looking under the hood (VC is bright yellow so I would see it) misfire idle seems to come and go. (Brand new VC...
  2. E46 General
    Please for God's Sake,:eek:, has some1 done that, and did it work ???
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