Mine Was Like That Before I Touched It,it Came Undone Really Easy Which Made Me Suspicious.i Heard Of Somebody Having Their Engine Wrecked By The Stud Pulling Out Of The Head So I Was Really Wary When Tightening It Up.i Dont Have A Special Engine But It Would Really Annoy Me Having To Rebuild It Because Of That Happening.least Thats 1 Thing Sorted,just Hope The New Sensor Arrives Tomorrow So I Can Take It Out To See If Everything I Have Done Is Ok.ordered It On Monday From P.j Motorsport And Still No Sign Of It!