Nissan VQ35DE User Manual

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Forced Induction Racing

VQ35DE Install Kit Instructions

2002+ Nissan SE-RSpec-V(W/6spd)

Revised Date: 2/16/06

Thank you for purchasing our VQ35DE install kit. We have spent numerous hours, designing, and perfecting this kit, over the past 8 months. The end result, is a user-friendly,easy to work with kit, that will allow you to“bolt-in”a VQ35DE engine and 6 speed transmission.

Recommended Tools:

Metric/Standard socket sets (3/8 and 1/2)

Torque wrench and Pry-Bar

Metric/Standard wrenches

Jack and jack stands

Eye/Ear and Respiratory protection

Disc Grinder and extension cord

Engine hoist and chain


This kit was design with simplicity in mind. Installing the VQ drivetrain will be fairly straight-forward.However, it will require moderate automotive knowledge, and the right tools to complete the job. If your are unsure about the installation, PLEASE, bring your vehicle to a qualified automotive shop to complete your installation. The hardest aspect of this installation, is the wiring of the ECU (Engine Control Unit) harness andsub-harness.Diagrams can be supplied upon request, which will help you to complete this task. However, the wiring aspect of this swap is fairly complicated, and should be left to a very experienced automotive technician. Again, if you are unsure, PLEASE, ask for help, or have someone who is qualified, do the work for you. Forced Induction Racing and it’s associates will NOT be held liable for any damages or injury from the use or misuse of this product. You are responsible for making your vehicle emissioncompliant. This kit is sold as aoff-roadkit. It is up to you to bring your vehicle up to compliance with state/federal laws. Now, on to the fun part. ☺

At this time, please take the time to go through your parts, and verify that you have all of the following pieces:

(1) Rear VQ35DE steel mount bracket

(1) Front VQ35DE steel mount bracket

(1) Front QR to VQ stainless mount adaptor

(1) Aluminum VQ35DE passenger side mount bracket

(1)Passenger side QR to VQ stainless mount adaptor

(1)VQ35DE cast iron axle bracket (bearing carrier)

(1)Stainless VQ35DE axle bracket adaptor

(3)“C-shaped”washers (for axle spacing)

(1)Plastic bag of washers (for shimming passenger mount)

(10)M10 x 1.50 bolts (30mm long) and washers

(1)M10 x 1.50 bolt (45mm long) and washer

(1)3/8” bolt (1.5” long) 2 washers/1 lock nut

(1)3/8” bolt (2.5” long) 2 washers/1 lock nut

(1)3/8” bolt (3” long) 1 washer/1 lock nut

(1)1/2” bolt (6” long) 2 washers/1 lock nut

(2)1/2” bolts (5” long) 4 washers/1 lock nut

(1)M10 x 1.75 lock nut and 1 washer

If you have purchased a full kit with the VQ35DE bell-housing,please take the time to make sure the following is installed:

(1) Throw out bearing pivot ball

(1) Input shaft seal

(1) Passenger side axle seal

Once you have verified the contents of your kit, it’s time to move on to the installation.

We will begin, with the assumption that you have removed your QR25DE and transmission. We will also assume that you have swapped over your bell-housingon your transmission, or, you have purchased a 6 speed Maxima transmission. If you are attempting to swap thebell-housingyourself, then you should be familiar with the

Factory Service Manual. If you need the manual for this particular application, it will be saved in a separate folder on this installation CD. Here is a picture, showing the difference between the QR and VQ 6 speed bell-housings:

The VQ bell-housingis shown on the left side, with the QR internals already installed. The old QRbell-housingis shown on the right. It is important to check clearances andre-shimthe main/input shaft and gear stacks if necessary. As stated, please use the Factory Service Manual, if you are have the knowledge/tools to perform this part of the swap. If you do not, then please consult a local transmission specialist to take care of this part of your swap.

Once you have your transmission squared away, it’s time to move on to mounting the transmission to the engine. If your engine was mated to an automatic transmission, you will need to source a VQ35DE 2002+ 6 speed flywheel and clutch. I recommend using a Jim Wolf Technology aluminum flywheel, teamed with their 250mm/900Kg clutch setup. This will yield a stock-likefeel, as far as pedal pressure and feedback are concerned. This combination is good for450-500wheel horsepower. Also, make sure to purchase new flywheel bolts for a 6 speed flywheel. The automaticflex-platebolts are too short to be used with a manual transmission flywheel.You should torque the flywheel bolts to 80ft lbs, and use a few dabs of Red LocTite. You should torque the pressure plate bolts to 20-22ft lbs, and use a dab of Red Loc-Tite on those as well. I recommend the

use of a high quality clutch alignment tool. This will make the next step a lot easier.

Grab a buddy, and have him/her help you lift the transmission up a few inches. Slide the input shaft into the clutch disc splines. The transmission should slide onto the two dowel pins that line it up perfectly with the engine block. Thread in the 17mm and 14mm bolts. If your engine did not come with the bolts, you will need to order them from Nissan. Torque the 17mm bolts to 45ft lbs. Torque the 14mm bolts to 35ft lbs. You should go ahead and install your starter at this time. Also, install your speedometer sensor and other misc. sensors that you should have with your wiring.

Next, it’s time to move on to the engine mount brackets/adaptors. Let’s start with the rear engine mount bracket:

A.Torque to 35-40ftlbs (back side of block)

B.Torque to 55ft lbs (goes through rear mount on cross-memberto be torqued down later)

Once you have the rear mount torqued down to the block, you can install the passenger-sideaxle bracket and adaptor. The bracket and adaptor will come loosely assembled as pictured:

A.Tighten this nut/bolt down LAST. Torque to 30-35ftlbs

B.Tighten these bolts into the block by hand, and just snug them for now. We will torque them later. Don’t worry about the C-shimsright now, either.

C.This bolt hole is no longer used

Once you have completed the rear mount/brackets, it’s time to move on to the front brackets. The front bracket/adaptor will be loosely assembled. It should be as follows:

A.Torque to 35-40ft lbs (mounts to front of engine block)

B.Torque to 50ft lbs (will be torqued later)

C.Torque to 50ft lbs (goes through QR front engine mount, will be torqued later)

Once you have completed that task, you should install the passengerside engine mount bracket and adaptor. You should also take the time to bolt your QR passenger side engine mount to the VQ mount/adaptor bracket. Tighten it all up while the engine is still OUT OF THE CAR. This will make your life MUCH easier. Trust me.. ☺ It should look something like this:

C. Replace your VQ bracket with this modified version, using the same 17mm bolts and bottom nut that should have come with your engine. Torque these to 50-55ftlbs. DO THIS FIRST!

A.Torque these bolts to 40ft lbs

B.Bolt your QR passenger engine mount to these two mounting holes. You will use your original nut/stud on the front hole, and the supplied bolt/nut/washers on the back hole. You may wish to use some of the supplied shims (washers to level off your engine. I suggest using 2-3shims. Unfortunately, there’s no way to know if you need to shim the engine up or not until it’s in the car. This makes things difficult on this end. All cars are a little bit different, so we’ve provide a few shims if you need them. Try2-3shims, and chances are, it will be close enough to perfect to live with. If you are really picky about the engine being perfectly level, then you will need to add/take out shims as

needed. Torque the stud/nut and bolt/lock washer on the holes marked “B” to 45ft lbs.

Remember, it is VERY important that you tighten those bolts in the sequence listed above. Otherwise, you will not be able to tighten the 17mm VQ engine bracket that is behind the 3/8” bolt for the QR mount!

Once you have finished that, you are ready to install the engine/transmission.

Hoist the engine/transmission into the car on a angle, so that the transmission side goes into the car first, and the engine is up, higher. Once the transmission clears the frame rail, you can slide it over towards the driver’s side as much as possible. Place a floor jack under the transmission to hold it. Slowly, lower the hoist so that the engine comes down into the engine bay. Have a friend jack up on the transmission, so that eventually, the QR engine mount is sitting back in it’s original place, and the transmission bracket slides into the driver’s side mount. Slide the 14mm bolt into the transmission mount/bracket on the driver’s side and tighten it down to 45ft lbs. Using your hoist and a pry-bar, if necessary, line up your (3) 14mm bolt holes that hold the QR passenger side engine mount in place. Thread the 3 bolts in, and tighten them to 40ft lbs. Check to make sure that your engine is level from side to side. If it’s close… great! If it’s way off, you will need to add/remove shims to get it level. Here’s a few pictures of what this should look like:

A & B- Add/Remove shims from between the QR engine mount and the adaptor plate, as needed to get your engine as level as possible. Remember, start with 2-3.That should get you very close. You may also have to use a few washers on the underside of the stud on the hole marked “B”, as the stud is a decent length. There should be plenty of washers to accommodate you. C- This hole is no longer used.

Listed above, is where you should insert your 14mm bolt to hold the transmission bracket into the mount.

Once you’ve got your engine in place, it’s time to modify and install the cross-member/frontand rear mounts.

Using your grinder/dust mask/eye protection/ear plugs, grind the posts on the rear QR engine mount, so that it fits into the rear VQ engine mount bracket. You should have to grind roughly 3/8 of an inch total to get it to fit inside the bracket. I have a picture shown below, which points to the places that have to be ground.

Once you get the correct clearance, you will need to drill out the front engine mount to fit the larger, 1/2” diameter bolt. Using the corresponding drill bit, drill the front mount hole so that the 1/2” bolt slides in and fits snug. The front mount is shown in the above picture at the top.

After modifying the mounts, you can now install the cross-memberand front/rear mounts. Using your jack and a friend… have your friend jack up on the transmission while you are under the car with thecross-member.Install the rear mount first… Slide the mount into the VQ bracket, and run the bolt through to hold thecross-memberup. Put your washer/lock nut on, and thread it until it gets snug. After

you get the rear mount in, pivot the front mount adaptor so that it lines up with the QR engine mount isolator. You may have to use the jack to pivot the engine/transmission in order to get the 1/2” bolt into the mount. The fit will be very snug. Once you get the bolt in, place your washer/lock-nuton the bolt to hold it in place. Using your jack, again, jack up on wherever is needed to get your 17mm front and rearcross-member-to-framebolts in place. You may have to use a prybar to line this up.Once you get the bolts in, go ahead and tighten everything down. The 1/2” bolts need to be at 55ft lbs. The 17mm bolts should be at 45ft lbs.

This is what it should look like: (front mount)

A.QR to VQ mount adaptor

B.1/2” bolt (Torque to 55ft lbs)

C.1/2” bolt (Torque to 55ft lbs)

This one is pretty easy… There’s a second set of holes that are closer towards the block. You will use those, instead of the original holes. Torque the 1/2” bolt/nut to 55ft lbs.

The last step in the mechanical aspect of this install, is to install the axles. The driver’s side axle, will bolt right in. No modification required.

For the passenger side axle… You will need to remove the QR bracket that bolts the axle to the QR block. It is held on by (3) 12mm bolts. Once you take the bolts off, you will be able to slide the adaptor off of the axle. Slide the axle through the new VQ axle bracket (attached to the block already), and into the transmission. You will slide the (3) 12mm bolts through the VQ bracket next and thread them back into the QR axle. DO NOT forget to use the provided “C-shims”between the axle and the bracket. This will space the axle away from the bracket just a hair, and give you the right

install depth into the transmission. Torque the 12mm bolts to 25ft lbs, and use Red Loc-Titeon the threads! After tightening the 12mm bolts down, go back, and torque the engine mount adaptor bolts in the block to35-40ftlbs. I recommend using loctite on those as well. Visually inspect the axle, and make sure that it’s sitting flush/perpendicular in the transmission. It’s a good idea to push/hold the axle into the transmission while tightening the mount adaptor bolts. This will help to assure that the axle is in perfectly straight. Here’s where theC-washersare placed:

That’s it for the install of the VQ/transmission! Now, you have lots of wiring, and other “fun” things to tackle ☺.

Here’s a few recommendations/pointers that will help you along the way…

The QR A/C compressor will bolt up, if you drill the two bottom holes to accept the larger diameter 14mm bolts, which the VQ A/C bracket uses. Here’s a picture:

You will only be able to use those 2 bolts, but it will hold up just fine. Our test car has been running for almost 6 months with this setup. If you drill the holes slightly larger, you can line the pulley up better, so that you can use 6 rib belt, instead of 5 rib. Take your time, and line it up, and you will be fine. Tighten those 14mm bolts down tight, and use some Loc-Titefor added insurance.

The Power Steering pump from the VQ works fine. Your QR hoses will clamp/bolt right up to it with no problems.

You will need to try some different radiator hoses. I used the QR lower hose, and went to Autozone to eyeball a suitable hose to come off of the engine and meet up with it. After some cutting, and using a piece of aluminum tubing to join them together, I came up with a combination that worked perfectly.

You will need slim fans… period.. Stockers will not fit. I recommend getting (2) 12” PermaCool fans from Autozone, and wiring them up to

the QR’s factory fan relay. From there, you can put 12 volts switched to the factory relay, and just run the fans constantly. This will help keep things cool under the hood.

The wiring is a pain in the butt.. no way around it. You will end up using sections of your QR harness along with the donor VQ harness. Take your time, and if you need diagrams, let me know. I will do my best to help you.

You MUST use the NATS (Nissan Anti Theft System) with the VQ ECU. There is no way around this. If your car has the system already, then it’s a simple task. You will need to wire up the Consult plug to the VQ ECU (just a few wires), and have a Nissan Technician re-flashyour ECU/IMMU to allow the car to start. The only way around this.. is if you were to get the ECU, IMMU unit (black box around the key cylinder) and matching key, ALL from the same donor car. If you get those parts, then, you can hook it up, and it will start right up from theget-go.If your car came without NATS.. you will need to source all of the components, and wire it up manually. Again, wiring diagrams can be had for free… just let me know.

As for exhaust, you will need to have a Y-pipemade to come off of the stock manifolds. I HIGHLY recommend purchasing aftermarketheaders/y-pipefrom a VQ30 Maxima. This will bolt on, and the Y- pipe can be modified to work in the Sentra without much fuss. I recommend a 2.5”, mandrel bent exhaust system as well.

The VQ35 responds well to exhaust/headers, intake and a good tune (AFC of Emanage). On slicks, expect mid-high12 second ¼ mile passes with full interior. With a gutted interior andbolt-on’s,expectlow-12second ¼ mile times.

If you are going to install nitrous oxide, it’s a good idea to go with a larger fuel pump. The Maxima pump should fit in without any modification.

It’s a good idea to replace the belts/spark plugs with new units before installing the engine..

Other than that.. good luck with your swap, and if you have any questions, feel free to contact me at or 985-713-1542from 9am to 5pm Central Time. You can reach me afterhours on the forums ( Be safe, and enjoy your newly found power! ☺