Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Its called TDC (top dead center) Haynes Manual have all infos you need, they sale this book in Auto Zone or Advance Auto Parts for $15 part # 18020 - 3/5 Series not including diesel or all-wheel drive models '82 thru '92 I am from Bosnia / Europe ,4 years ago i move to Erie , PA USA ,my English is sux ,so please do not critize me 89 BMW 325i