HR SWAP DIY Guide This 'How-To' gives a description of the steps required to prepare an HR motor for installation in the 2002/2003 Maxima. Kit & Recommend Parts (click on image to purchase)FWD HR Engine Swap Kit EPS Tuning Oil Gallery Gasket/Hardware Kit VQ35 FWD HR Head engine There are a few things to keep in mind before beginning your swap:
Step 1: Stripping the motorDepending on where your motor came from, there may be a lot of ‘extra’ pieces still attached to it. Some of these will just get in your way while you prep your motor, some can’t be used for this swap.
** The injector rail may also be removed, but that isn’t necessary. Step 2: Cover any openingsThere will be A LOT of metal shavings and dust around the motor, depending on how you do the cutting and grinding that comes later. These absolutely CANNOT be allowed to get into the motor.
Step 3: Modifying the motorSome parts of the motor will need to be cut somehow (tools, methods and results will vary) to allow for proper fitment and function once it’s reinstalled. ** Because of some concerns about the integrity of the stock oil gallery gasket, we at NISformance strongly recommend replacing it in this step. **
Step 4: Adjusting the cam signal wheelThis is a VERY important step and it must be done very carefully for your car to run properly. You have to be accurate. Apart from the wiring, adjusting the signal wheel is the most detailed work you need to do on the swap. It is important to be very accurate when cutting or grinding, and it’s also extremely important to assemble everything correctly at the end of this step. Pay close attention to the pictures and make sure that your work looks EXACTLY the same! *You will need to modify your 5/16 Allen key by cutting the arm down so that it is approximately 3/8″ long. This is your ‘special tool’ that you will need to use in this part of the swap.
Step 5: Cam Sensor WiringNow that all of the heavy wrenching is out of the way, we get to the really important part of your swap. The wiring harness in your car needs to be connected to the newer motor, and it’s not just a ‘plug-and-play’ situation. These diagrams show you the changes that need to be made to make your DE harness control your HR motor: ** THESE WIRE CONNECTIONS ARE CRITICAL. MAKE SURE THAT THEY ARE CONNECTED CORRECTLY (ACCORDING TO THE INSTRUCTIONS), AND SECURELY. TWISTING THEM TOGETHER IS NOT GOOD ENOUGH. ** The stock cam signal wire will be intercepted (cut) by the cam signal inverter supplied with the swap kit. There are six wires on the cam signal inverter…here’s how you connect them:
For Cam #1…cut the existing wire:
For Cam #2…cut the existing wire:
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