02-06 Nissan Altima/Sentra 2.5 Crankshaft Seal Replacement *Detailed* Removal & Install QR25DE
This guide details the process of replacing the crankshaft seal on a 2002-2006 Nissan Altima or Sentra equipped with the 2.5L QR25DE engine. It covers the removal of the crankshaft pulley, the seal itself, and the reinstallation of the new seal and pulley, emphasizing the use of specialized tools like a slide hammer and impact gun for efficiency and safety. The instructor, with nearly 20 years of automotive experience, highlights potential challenges and offers advice for DIY mechanics.










