Ptu Relocation "How To"

Before we get full fledged into one of the first relocation's every 300zx owner should do lets talk about WHY. 

The Power Transistor Unit, also known as the PTU, essentially controls spark by sending signals to the coil-packs telling the coil-pack when to fire. Here is the thing though, Nissan for some odd reason decided to mount the PTU on the passenger side (LHD) timing cover. Yes the Ptu fits in this location well however it is subjected to high amounts of heat and heat cycles. This overtime can cause the PTU to fail. Some of the symptoms of a failing PTU include intermittent misfire, misfire in 1 or more cylinders, and overall a rough running engine. If we take the heat away from this unit though it rarely ever fails, and that is why I always recommend the PTU as the very first thing anyone should relocate on their z32. 

What Tools Will I Need?

-Socket Wrench

-8mm Wrench (or 8mm Socket)

-10mm Wrench (or 10mm Socket)

-Razor (Box Cutter)

-Electric Tape

-Flat Head Screw-Driver

-PTU Relocation Bracket (or Temporarily Use a Ziptie)

 

Steps:

1. We need to unbolt Ptu from its stock location. There are (4) 8mm bolts holding the ptu to the passenger timing cover. The top 2 are easy to get to, but the bottom 2 are a little harder to take off with a socket wrench and socket so i recommend using a close end or open end 8mm wrench for the bottom 2 bolts. 

2. There are 2 main tabs and a plastic bracket that hold the ptu wiring as well as the engine temp plugs close to the timing covers. Now that you have unbolted  the Ptu, pull the 2 tabs back to allow you to pull the section of wiring out of place. here is a picture for reference. 

3. There is also a plastic type tab/bracket that holds the far end of the ptu wiring section. Use your flat head screw driver to lift up the top plastic tab to release the brackets grip. 

4. Now that the harness is loose we need to separate the ptu wiring from the engine temp plug wiring (the engine temp plugs are the 2 plugs directly in the center and in front of the timing covers that plug into the coolant hard-pipe). We can separate the plugs wiring by using a razor blade to carefully cut the old electric tape holding both sets of plugs wiring together (dont go HAM, just lightly cut down the length of the loom about 8-12 inches. Just enough to give the ptu enough length to route forward beside the radiator). 

Here is what it looks like once you have carefully cut through the electrical tape. 

NOTE: the intake hardpipes do not need to be removed to do the ptu relocation, however it does make it easier. 

NOTE: the intake hardpipes do not need to be removed to do the ptu relocation, however it does make it easier. 

5. Now that the 2 sections of wiring have been separated, we need to re-wrap the wires with electrical tape. For simplicity's sake you can tuck the engine temp plugs wires back into its original sheathing and re-wrap it with electric tape. Dont forget to wrap the exposed PTU wiring. 

6. The brunt of the work has now been completed. Next we need to unplug the PTU from the harness. The reason we need to unplug the ptu is because it will make the next step much easier. 

7. Once the Ptu is unplugged, we are going to feed the plugs under to the nose panel area. there is a little open section between the radiator and the headlight tray, thats right above the intake pipe on the drivers side that i circled below for you all. 

8. Feed the PTU plugs through this area and pull the plugs through to the other side. 

9. Alright now just plug the Ptu back in, and use a Ptu relocation bracket to secure the Ptu in place off to the right slope of the nose panel area. (If you dont have a relocation bracket you can temporarily ziptie the Ptu in place). 

I didnt have a PTU relocation bracket when i started this write-up, but i will be replacing the ziptie with a proper bracket as soon as it gets in. 

I didnt have a PTU relocation bracket when i started this write-up, but i will be replacing the ziptie with a proper bracket as soon as it gets in. 

10. Now its time to secure the harness by the timing covers in the tabs and plastic bracket (the ones we undid at the beginning). and clean up the timing cover where the PTU used to be. 

11. Take a step back and look at your work. 

And thats all for this relocation. Hope it went smoothly for you as it has for me. 

 

As always have an amazing day and stay driven. 

 

By: Ocean Nickel

 

 

 

Is The 300zx Really That Hard To Work On?

Is The vg30de(tt) Really That Hard To Work On? 

Stock 300zx engine bay other then some intake hardpipes. In the upcoming posts we will be going through relocation's, deletes, and wiring tucks on this bay to show you all how clean a 300zx bay can really be. 

Stock 300zx engine bay other then some intake hardpipes. In the upcoming posts we will be going through relocation's, deletes, and wiring tucks on this bay to show you all how clean a 300zx bay can really be. 


In stock form absolutely, ehh let me take that back its not necessarily hard to work on, just time consuming and over complicated. The 300zx engine bay from factory is a rats nest to say the least. Its broad engine, octopus looking wiring harness, and accessories that crowd the bay such as the fuse box, ps reservoir, ptu, ect all add up to a annoying to work on car. BUT, it doesn't have to be. You see once you do a few relocation's and deletes, the z32's bay becomes this simplistic, sleek beauty. Its like having braces back in highschool, its crowded, complicated and messy at first, but when you get them off it reveals that perfect hidden smile. In the upcoming blogs ill be going through some of these deletes and relocation's with you all, and i can promise if you guys and girls follow these how to's, you'll realize how easy a vg can really be. And as always i hope you all have an amazing day and stay driven. 

Ocean Nickel
 

Origin Z Intro

a 300zx front.jpg

My name is Ocean Christmas Nickel, a z32 enthusiast at heart with a drive to improve, create and teach others about this amazing chassis. Ive started this blog which ive named the Origin z, to share my experiences, share my knowledge and help both veterans and the new guys improve their cars. Im making it my goal to post a blog weekly or bi weekly to give you a constant stream of content, and plan to take you guys through a variety of topics including but not limited to, relocation's, deletes, full how to's, wiring, fabrication, na-t and na-tt conversions, product reviews, and the occasional creative writing blog.

We will start with the Originz, and see where this blog goes. If this blog is well received and viewed there is a possibility that ill be creating a youtube channel for more in depth info. But for now i hope you all enjoy the content, and as always have an amazing day and stay driven.

Ocean Nickel