Replace your QR25DE - PDF File for Printing
If you have basic mechanical experience, you can pull and swap this engine. The only special tool may need to borrow/rent is an engine hoist. If you do some work on your vehicle already, you probably have everything else you will require. This guide is not heavy on pictures, and so it assumes you have some basic knowledge - but even if you don't - there is enough information that you should be able to figure it out.
This guide was written as a QR25DE from an 2005 Altima was swapped in to a 2003 Sentra Spec-V that was destroyed due to Nissan's Pre-Cat problem. It includes virtually all of the torque specifcations for the major fasteners removed during tear down. No hunting through the FSM.
Removing the engine from the Sentra is a very easy procedure. Basic things you will need:
- Engine Hoist
- Air Gun
- Torque Wrench
- Breaker Bar (Could be helpful!)
- Basic Wrenches, Sockets & Extensions
- Fuel Line Disconnect Tool
Note: The knock sensors on the Altima are different than on the Sentra. You need to swap them so the harness can be connected. All other sensor connectors will work. If your replacement engine came from a Sentra, well, no issues presumably.
There are two other pages in the PDF which illustrate the engine wiring harness layout and identify the purpose of each connection.
Happy engine swapping.