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7th Gen Engine and Accessories Full Wiring Swap

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7th Gen Engine and Accessories Full Wiring Swap

Old 02-24-2019, 02:41 AM
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7th Gen Engine and Accessories Full Wiring Swap

I swapped in a 2k14 motor and kept the 7th gen pulleys and accessories. Here's a quick compilation of everything you'll need from the old car and new car

4th Gen:
Flywheel (will need 02/03 manual flywheel to have timing ring modified to fit, see thread comment #5)
Oil Pans (Use your 4th gen crank sensor)
Power Steering Hose (will fit 7th gen pump)
Engine mounts and brackets
Passenger axle bracket off motor
Rad Hoses (probably replace)

02/03 5.5Gen:
ECU
NATs (Nissan Data Scan can reprogram keys)
​E-Gas Pedal
Gauge Cluster
PS Pressure Sensor (direct replacement for 4th gen switch)
A few connectors from dash harness

7th Gen:
-Compressor, PS Pump, Alternator (different number of ribs from 4th gen pulleys, must use all 7th gen or all 4th gen, but 4th gen requires following the nisformance guide bc they will not line up)

-PS pulley is extremely tight, go at the passenger side with a 5lb hammer and be sure to make wiggle room anticipating tight turns and when your motor mounts degrade


-Compressor needs bracket made (well, I didn't have a 4th gen bracket but I'd assume it doesn't it's not really the same style). Did it with some spare steel and the help of a friend who had a welder and knew how to do it

I bought 2hex inverters for $1 or something like that online and even got free overnight shipping, I also got 12v to 5v inverters but I've heard the power steering has a 5v power source for the inverters.

I also got an i35 cluster, the wiring is basically the same if you're a manual trans but the cluster is a lot nicer IMO

Many people say the oil gallery gasket problem was fixed in 2012, I'd definitely replace it with the improved gasket nisformance sells if yours is 2k12 or older

As far as wiring is concerned the EL sections of FSM will be a huge help mapping out where the connectors are and help explain a connection you're confused about and the foldout can help identify some of the wires corresponding to fuses.







Here's a diagram for wiring up the 09+ throttle body





Credits to eng92 for the wiring diagrams and flywheel info, schmellyfart for answering all kinds of questions, User1 for the being the 7th gen accessories test dummy on his 5.5gen, Wizard for being a hell of a guy, others I can't remember their usernames atm

Last edited by Violator; 03-11-2019 at 07:50 PM.
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Old 02-26-2019, 07:21 AM
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What transmission are you using?

I assume 6 speed hence the flywheel comment but why does it need to be modified if your doing a full 3.5 ecu swap?

Last edited by vingodine; 02-26-2019 at 07:30 AM.
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Old 02-26-2019, 07:29 AM
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Originally Posted by Violator View Post

So here's a quick compilation of everything you'll need from the old car and new car

4th Gen:
Flywheel (will need 02/03 manual flywheel to have timing ring modified to fit)
Oil Pans (Use your 4th gen crank sensor)
Power Steering Hose (will fit 7th gen pump)

02/03 5.5Gen:
ECU
NATs (Nissan Data Scan can reprogram keys)
​E-Gas Pedal
Cluster
PS Pressure Sensor (replaces 4th gen switch)
A few connectors from dash harness

7th Gen:
Compressor, PS Pump, Alternator (different number of ribs, must use all 3)
​​​​​​
1. What do you mean will need 02/03 flywheel to have timing ring modified to fit?

2. You used your 4th gen upper/lower oil pans on the 7th gen motor aka 2nd gen vq35de aka fwd hr motor?
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Old 02-26-2019, 11:24 AM
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Originally Posted by vingodine View Post
1. What do you mean will need 02/03 flywheel to have timing ring modified to fit?

2. You used your 4th gen upper/lower oil pans on the 7th gen motor aka 2nd gen vq35de aka fwd hr motor?
1. The 3.5 uses a different flywheel signal plate than the 4th gen. So you either need some sort of adapter to attach the 3.5 signal plate to a 4th gen flywheel or do a 6 speed swap and use a regular 6mt flywheel.

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Old 02-26-2019, 01:24 PM
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Originally Posted by vingodine View Post
What transmission are you using?

I assume 6 speed hence the flywheel comment but why does it need to be modified if your doing a full 3.5 ecu swap?
Originally Posted by vingodine View Post
1. What do you mean will need 02/03 flywheel to have timing ring modified to fit?

2. You used your 4th gen upper/lower oil pans on the 7th gen motor aka 2nd gen vq35de aka fwd hr motor?
I stuck with the 5spd, kept the old flywheel unbolted the signal plate and had a machine shop cut the timing ring/signal plate off a 3.5 and weld it to a bolt on 3/8 spacer

​​​​​​

And yes I used 4th gen oil pans for exhaust clearance.
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Old 02-26-2019, 10:41 PM
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Originally Posted by User1 View Post
You're gonna love it. My car screams and I'm 4AT.

Add: Stock curb weight for '99 SE is 200lbs less than an '03 SE. Then you're dropping a 2nd gen VQ into it... Nice...
You almost sound jealous? And just like me with the weight and when I'm trying to explain to people why I did this swap. the 3.5 on 3.0 timing is absolute dogmeat. my 3.0 was way more fun to drive, the 3.5 was like I was towing another car until getting to 3500-4000rpm

pretty excited. Hopefully it all starts going in the bay tomorrow night, gonna be hard to fight the urge to stay up all night and go for a spin

​​​
​​​​​
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Old 02-27-2019, 12:33 AM
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Originally Posted by Violator View Post
You almost sound jealous? And just like me with the weight and when I'm trying to explain to people why I did this swap. the 3.5 on 3.0 timing is absolute dogmeat. my 3.0 was way more fun to drive, the 3.5 was like I was towing another car until getting to 3500-4000rpm

pretty excited. Hopefully it all starts going in the bay tomorrow night, gonna be hard to fight the urge to stay up all night and go for a spin

​​​
​​​​​
My 3.5 on 3.0 wasn't dog meat. It was like adding a turbocharger . Went from 13.8 to 12.72. I ran a 12.72 with stock fuel,timing and rev limit. 95 maxima stock ecu.

Mods to the engine was 350z JWT behive springs and arp rod bolts. I was in the process off getting engine management. But the car was totaled.

The 13.8 was a JWT ECU set at 8000 rev limit.

The car was about 120lbs lighter with 3.5 ,very few other changes. It was a monster.

Last edited by krismax; 02-27-2019 at 12:37 AM.
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Old 02-27-2019, 03:20 AM
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Originally Posted by schmellyfart View Post
1. The 3.5 uses a different flywheel signal plate than the 4th gen. So you either need some sort of adapter to attach the 3.5 signal plate to a 4th gen flywheel or do a 6 speed swap and use a regular 6mt flywheel.
correct. I wasn't sure if he went 6 speed hence the confusion on modified flywheel comment. I'm aware of others retaining their 5 speed or AT.

I went 6 speed, everything PNP for me. IMO that was easier and cheaper but I also had a 5.5 parts car so that helped tremendously.

Originally Posted by Violator View Post
I stuck with the 5spd, kept the old flywheel unbolted the signal plate and had a machine shop cut the timing ring/signal plate off a 3.5 and weld it to a bolt on 3/8 spacer

​​​​​​

And yes I used 4th gen oil pans for exhaust clearance.
Nice. Was just curious from your post as it was kinda vague on that but dope you kept the 5 speed.

Cool on the 4th gen oil pan swap, good to know. I didn't know 4th gen oil pan could be utilized in full 3.5 swap w/ 2nd gen de, I knew of hybrid swaps but usually everyone doing 2nd gen swaps on 4th gens are 3.0 timing and the 5.5 use old 5.5 parts so that was new to me to lol

Originally Posted by User1 View Post
You're gonna love it. My car screams and I'm 4AT.

Add: Stock curb weight for '99 SE is 200lbs less than an '03 SE. Then you're dropping a 2nd gen VQ into it... Nice...
+1 5 speed also weigh a lil less than 4AT and 6MT I would imagine.

Originally Posted by User1 View Post
Too proud of my build to be jealous, but at 3000 pounds with a 2nd gen VQ you're in for a surprise if you thought your 3.0 was fun.
+1
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Old 02-27-2019, 03:24 AM
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Originally Posted by Violator View Post
You almost sound jealous? And just like me with the weight and when I'm trying to explain to people why I did this swap. the 3.5 on 3.0 timing is absolute dogmeat. my 3.0 was way more fun to drive, the 3.5 was like I was towing another car until getting to 3500-4000rpm

pretty excited. Hopefully it all starts going in the bay tomorrow night, gonna be hard to fight the urge to stay up all night and go for a spin

​​​
​​​​​
Do that ****.
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Old 02-27-2019, 10:03 PM
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Originally Posted by vingodine View Post
Do that ****.
My buddy helping me make a proper bracket/plate for the compressor giving it a lot more stability luckily asked if I had used a clutch alignment tool, which I'd never heard of. O'Reilly's has one waiting for me in the morning.

But I hope I can curb the pictures wanted apetite with these. (Much more coming, especially dumbing down the full 3.5 wiring because it's way too easy for only 3-4 people to of done it, as well as PS and compressor fitment and any other noteworthy things I come across)

15k miles, thing of beauty internally, externally not so pic worthy engine lost it's shine to aluminum corrosion and I won't be keeping up with the polishing being a daily driver in ohio

​​​​​​
yes I neglected to cover my intake ports, I'll be attaching small rubber fuel hose to snake down in there and thoroughly suck any debris up



For those whom hadn't seen it, my engine bay was real bad. A thick layer of grease/rubber from belts on the left side, a brush and simple green made it ez-pz.

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Old 02-28-2019, 08:22 AM
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Originally Posted by User1 View Post
Nice! You gonna tie those throttle body cooler/warmer ports together?
Tie them together? I'm aware of the coolant delete on the UIM for the vq30 I assume that's basically what you're talking about

If it is I haven't given much thought to it. I know I'll probably be teeing the vacuum lines between the two variable intake solenoids since the 02/03 ECU only has one output and I think according to slamrod he said they activate at the same time

Got my plastic $5 clutch alignment tool that cost me quite a bit of progress last night, I'll get the ball rolling in a couple hours I don't have classes or think I work this weekend so over the next couple days this should all be wrapped up

As far as weight is concerned the vq35s weigh something like 20-50 pounds lighter, plus I've got the weight savings in aftermarket exhaust cat deletes and coilovers suspension. I'd like to think I weigh in around 2800. And my grandpa said I'd never win the Daytona 500, non-believers.

Last edited by Violator; 02-28-2019 at 11:11 AM.
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Old 03-01-2019, 08:06 AM
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Originally Posted by User1 View Post
11pm here on the east coast. Hope it's going well! Get pics along the way! I regret not getting more during my work. Hard to shoot when you're in the zone though. You just want to get it done!
FACTS

Originally Posted by Violator View Post
My buddy helping me make a proper bracket/plate for the compressor giving it a lot more stability luckily asked if I had used a clutch alignment tool, which I'd never heard of. O'Reilly's has one waiting for me in the morning.

But I hope I can curb the pictures wanted apetite with these. (Much more coming, especially dumbing down the full 3.5 wiring because it's way too easy for only 3-4 people to of done it, as well as PS and compressor fitment and any other noteworthy things I come across)

15k miles, thing of beauty internally, externally not so pic worthy engine lost it's shine to aluminum corrosion and I won't be keeping up with the polishing being a daily driver in ohio

​​​​​​
yes I neglected to cover my intake ports, I'll be attaching small rubber fuel hose to snake down in there and thoroughly suck any debris up



For those whom hadn't seen it, my engine bay was real bad. A thick layer of grease/rubber from belts on the left side, a brush and simple green made it ez-pz.
Love your Retro R34 setup


Originally Posted by User1 View Post
Nice! You gonna tie those throttle body cooler/warmer ports together?
Originally Posted by Violator View Post
Tie them together? I'm aware of the coolant delete on the UIM for the vq30 I assume that's basically what you're talking about

If it is I haven't given much thought to it. I know I'll probably be teeing the vacuum lines between the two variable intake solenoids since the 02/03 ECU only has one output and I think according to slamrod he said they activate at the same time

Got my plastic $5 clutch alignment tool that cost me quite a bit of progress last night, I'll get the ball rolling in a couple hours I don't have classes or think I work this weekend so over the next couple days this should all be wrapped up

As far as weight is concerned the vq35s weigh something like 20-50 pounds lighter, plus I've got the weight savings in aftermarket exhaust cat deletes and coilovers suspension. I'd like to think I weigh in around 2800. And my grandpa said I'd never win the Daytona 500, non-believers.
Originally Posted by User19196443
Yes, do the throttle body coolant bypass while you have easy access. 2800lbs? Wow. Gonna feel like a shifter cart lol
Yea I also did the tb coolant bypass although I have a 1st gen DE same **** lol

Yea the 2nd gen DE you can use one solenoid and T'ee the vacuum source to both VIAS

One time I had a clutch alignment tool and misplaced it so I just winged it by using the biggest socket w/ extension I can fit into the clutch/pilot hole location on engine and also eyeballing the clutch alignment and position on flywheel as I slowly torqued the pressure plate and checked the clutch disc was centered as best i could get it.

Fun Times lol
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Old 03-01-2019, 08:18 AM
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Originally Posted by vingodine View Post
FACTS



Love your Retro R34 setup








Yea I also did the tb coolant bypass although I have a 1st gen DE same **** lol

Yea the 2nd gen DE you can use one solenoid and T'ee the vacuum source to both VIAS

One time I had a clutch alignment tool and misplaced it so I just winged it by using the biggest socket w/ extension I can fit into the clutch/pilot hole location on engine and also eyeballing the clutch alignment and position on flywheel as I slowly torqued the pressure plate and checked the clutch disc was centered as best i could get it.

Fun Times lol
Morimoto mini h1s, there's actually only 2 projectors with 2 empty shrouds for the quad retro look. Didn't wanna dump all the money into an extra set of headlights. I regret cheaping out on the Halo rings and I got eBay ones, remote control any color, I just like the look of the opaque white halo covers. Still need to make a bracket to aim them they are just butyl glued in place but I live in town so it hasn't been a problem but as soon as I get it running that's my next project

Push back to next weekend. Took apart tranny to clean out crap that got inside and spent all day today getting it back together correctly because I had 1 "extra" interlock ball that fell out when separating the case and had to figure out where it went with no help from the fsm. Was convinced to replace the clutch at this point (cheap but functional xtd with 20k miles on it seemed like it only had 15k miles of life left) so I ordered a nice ACT kit

Wiring done, trans mounted in car, will clean up a little this week and take some pics, just waiting on the clutch to come in and my buddy to come through with the finishing touches on that AC bracket


Last edited by Violator; 03-03-2019 at 12:19 PM.
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Old 03-08-2019, 12:38 PM
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Spent the night making the bracket for the compressor and removing a broken pressure plate bolt. Trans is mounted, wiring is 3/4 done and I'll finish it in the morning, no ifs ands or buts, this thing is getting fired up tomorrow

Last edited by Violator; 03-09-2019 at 07:26 PM.
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Old 03-10-2019, 08:03 PM
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Update on below: 5lb hammer did the job making room for the pulley no problem. I previously separated the trans to remove debris and have an extra shiny metal ball that fell out when seperating that i didn't put back in the right spot. It's half the size of the check *****. I already dropped the engine and trans back on the ground and I'm on spring break so I'll be up early in the AM figuring out where it goes and then I can go back to reassembly

My back hurts


As User1 ran into with his 5.5 gen, there's no clearance with the PS pulley.

Last edited by Violator; 03-12-2019 at 09:51 PM.
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Old 03-14-2019, 07:41 PM
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I guess the 5.5gen engine harness is 2 piece so I've only got 3 injectors and 3 ignition coils on my harness and have to go to a junkyard
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Old 03-15-2019, 07:37 PM
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What are you pounding towards starboard on the inside of the passenger side framerail with this hammer?

Originally Posted by Violator View Post
Update on below: 5lb hammer did the job making room for the pulley no problem.
As User1 ran into with his 5.5 gen, there's no clearance with the PS pulley.
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Old 03-15-2019, 10:09 PM
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Originally Posted by reallywildstuff View Post
What are you pounding towards starboard on the inside of the passenger side framerail with this hammer?


Translation please? The pulley in the picture is touching and needed space as user1 did in he swap I smacked it in. I was initially hammering the wrong spot which was why I was making no progress with my hammering to begin with but the part next to the pulley will dent right in with a 5lb


I would love to of finished this today I got the subharnesses for the engine harness I was missing but then I spent all last night puking and pissing out my *** I'm doing much better today. I feel exhausted spending 2 minutes looking for my phone so I'll have to wait a little longer, haven't even been sick enough to puke in over a decade this happened at the best possible time

Last edited by Violator; 03-17-2019 at 08:14 PM.
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Old 03-18-2019, 06:53 PM
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Drink plenty of water! You'll feel better when it fires right up
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Old 03-19-2019, 08:58 AM
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Originally Posted by User1 View Post
Drink plenty of water! You'll feel better when it fires right up
​​​​​It's so close Going from a worn eBay XTD racing style 6-puck clutch to the ACT street performance is gonna feel great, I threw on a TWM short shifter which I'm excited to try, the test shifts seemed almost non existent. Plus I'll finally have variable timing, this thing should be much more street able and fun to drive. Got a wallbro fuel pump but I don't expect to see any difference from it, figured it was time to replace the old one if it would even be able to keep up with the new engine, and now it's 1 less thing to worry about
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Old Yesterday, 09:48 AM
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Nice dude.

I have a walbro 255 in my 98 full 1st gen 3.5 swap using a Aeromotive AFPR (Adjustable Fuel Pressure Regulator) set at 51 psi constant no vacuum hooked up just like stock 5.5 gens vs stock 4th gens 34psi idle/43.5 WOT w/ vacuum source hooked up.

I also went from stock clutch/flywheel to Fidanza lightweight and nisformance stage 2 clutch after 1000 mile break in clutch feels good along with custom STS for 6 speed.

I've had a TWM on my 5 speed along with a weighted shift **** and loved it.

Last edited by vingodine; Yesterday at 09:50 AM.
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Old Yesterday, 07:04 PM
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How's the progress? Curious if you would post your hex inverter setup? Hope you're feeling better!
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Old Yesterday, 07:43 PM
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Originally Posted by User1 View Post
How's the progress? Curious if you would post your hex inverter setup? Hope you're feeling better!
Was going to avoid posting until tomorrow after I attempt to fire it up. Still wasn't feeling like a superstar today so I just spent some time repairing and replacing connectors on my new subharnesses and connecting everything and I traveled to my precalc class tonight. Couldn't find the pack of crush washers I got for my oil pan so I'll pick another up tomorrow.

As far as my inverter set up I followed Austin's footsteps (scroll down a little ways https://maxima.org/forums/5th-genera...g-5-7-gen.html) Did you guys tap into the 5v at the PS sensor and feed both cam sensors? I have the 12-5v regulators just curious. I got my 7th gen cam connectors and held off on soldering today bc the inverter gets 5v but I'm assuming I'll have to also splice in the power wire for the cam sensor? I'll update with pictures and links tomorrow

After 1oclock i got all day for the intake manifold, small ****s like trimming my new hoses and adding fluids, complete the wiring for the engine bay, double check everything and as long as my signalplate/flywheel combo are good it should start right up. I even got a spare 03 MAF. I am probably overworrying about the flywheel but at this point it would not surprise me that the machine shop somehow magnetized my signal plate and I'll have to demagnetize it
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Old Yesterday, 07:55 PM
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I'm not sure about the sensitivity of the signal plate, but I understand your concern if there was machine work involved. In fact, the FSM even states not to lay/store the signal plate on it's face (IIRC) and the only rationale that crossed my mind was magnetic polarity, but alas, I overthink everything.

Re: Intake camshaft signal inverters,

I have the second gen kit from Nisformance running off the 12V leads from the stock harness, requiring no reference voltage modification (did not have to tap into 5V PS source as was necessary with their 1st gen kit). If your hex inverters are 5V, I would just tap into the 12V cam signal sensor harness with a buck converter down to whatever your data sheet reads for the inverters. I wouldn't mess with PS electrical. Buck converters are a few bucks a piece. I actually have a buck converter and hex inverters laying around and as soon as I have time I'll build and test a set myself.

Edit: Like these
Amazon Amazon

Last edited by User1; Yesterday at 07:57 PM.
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