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How to install a Motordyne Plenum Spacer on a Nissan 350z

The following installation overview is designed to give you an idea of what is involved in installing a Motordyne ISO Thermal Plenum Spacer on a 2004 Nissan 350z.


Installation Info
Location: 7901 Canoga Ave, Canoga Park, CA 91304
Vehicle: 2004 Nissan 350z
Plenum Spacer: Motordyne ISO Thermal Plenum Spacer (Click Here)
Estimated HP: 12-14 additional HP


Ratings (Scale of 1-10, 10 being the best)
Packaging: 9
Installation manual: 9
Ease of installation: 9
Appearance of system: 10
Quality of spacer: 10
Quality of accessories/hardware: 10
Overall value of system: 10
Performance (low-end): 8
Performance (mid-range): 9
Performance (top-end): 10
Overall Rating: 9


Step-by-Step Installation Overview

1. Place the plenum spacer on top of the bottom plenum so that the Motordyne Gasket is facing up. Keep stock gasket in original position.
2. Locate the 3 Large bolts,3 medium bolts, 6, washers, and 6 plastic plenum spacers. Place washer on each bolt and dab a little locktite on the end of each bolt. The 3 Large bolts will go on the upper side of the plenum and the 3 medium bolts will go on the lower side of the plenum. After bolts are installed, screw in the 6 plastic spacers as shown.
3. Next place the top part of the plenum onto the rest of the manifold and slightly screw in the 6 bolts. (Make sure you do not pinch the rubber oil fill spout in between the spacer and the plenum.)
4. Install all the lose hoses. And proceed with adding the rest of the bolts on the plenum.
5. The extra long bolt goes in the number 9 hole in the plenum, which is located by the throttle body.
6. Now that you pretty much are done, you must torque all the bolts to the correct torque specs and then bolt on the intake.
7. Now that you are done, check for any vacuum leaks and then screw the plenum cover onto the engine.

Survey

Question: Please provide us with a general overview of how the installation procedure went.
Answer: The installation was very straight-forward. I just followed the directions to the letter and really encountered no problems to speak of. The install manual is very detailed and the labeling of parts come in separate bags, which make locating parts simple.

Question: How long did the installation take?
Answer: Approx 1 hour.

Question: What was the most difficult part of the installation?
Answer: Installing the Throttle Body. The Throttle Body does not need to be taken off, however we replaced the Satin Upper Plenum with a Polished Upper Plenum so we had to take off the Throttle Body. If we would have installed the Throttle Body onto the Plenum first, everything would have been a breeze. The install does not require for the Throttle Body to be taken off of the plenum.

Question: What was the easiest part of the installation?
Answer: Actually the whole install was very simple.

Question:
Was the installation manual easy to understand?
Answer: Yes, everything was straight-forward and labeled perfectly. The only part that had me guessing was what size bolts to use for the first 6 bolts, which we clarified on step 2.

Question:
Did anything about the installation process surprise you?
Answers: No, everything fit like it should.

Question: Were any strange tools required for the installation?
Answer: A 4mm socket is needed however the install manual shows a trick so you can get the tiny guide pins off without the 4mm socket. Also a torque wrench is needed so you do not crack the plenum.

Question: Let's say I have installed an exhaust system and air filter on my vehicle myself without much difficulty. I am not a mechanic, but I know my way around the engine. Should I attempt this installation myself, or should I take it to a professional?
Answer: If you're confidant in your abilities I say go for it. Just take your time and follow the directions step by step. But if you're apprehensive, I would have a professional do it. However I feel this is one of the simpler items to install.

Motordyne ISO Thermal Plenum Spacer: Click Here


NOTE: Plenum spacer kit will come complete. All Bolts, Washers, Gaskets, Locktite, and instructions are included. Instructions are detailed right down to the torque specs of the bolts.


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