G35 Coupe V35 2003 - 07 Discussion about the 1st Generation V35 G35 Coupe

The vk45de engine swap guide

  #1  
Old 03-20-2019, 08:54 PM
kel
kel is offline
Registered User
Thread Starter
Join Date: Jun 2004
Posts: 281
Likes: 0
Received 9 Likes on 8 Posts
The vk45de engine swap guide

I was responding to a pm message and decided to just share the swap info with everyone who wants to try it on their g35. First thing to know is that you can use the stock engine mounts from the g35 on the v8 vk45de, for the transmission I just bought the bellhousing fom the vk45 and had a machine shop adapt the vq35 6 speed transmission to the vk45 bellhousing. For the car to run with no problems you will need to use both flywheels, the v8 flywheel is very thin but you need it for the ecm to read the correct timing. You will then install the vq35 flywheel on top of the v8 flywheel. Also remember to get a bearing that goes in the back of the v8 engine + most importantly there is a metal spacer that goes between the engine and the transmission bell housing. I f you don not install the spacer the timing will be off. The v8 engine harness has to be adapted to run on the g35. Once you have the harness done you can have uprev remove the nats security program from the ecm.

Here's the link to my build from along long time ago.
https://g35driver.com/forums/picture...oject-g45.html
 

Last edited by kel; 03-20-2019 at 09:05 PM.
The following users liked this post:
itgogitrev (04-09-2019)
  #2  
Old 03-21-2019, 01:48 PM
cswlightning's Avatar
Registered User
Join Date: Jul 2017
Location: Southern Maine
Posts: 903
Received 93 Likes on 86 Posts
Originally Posted by kel View Post
You will then install the vq35 flywheel on top of the v8 flywheel. Also remember to get a bearing that goes in the back of the v8 engine + most importantly there is a metal spacer that goes between the engine and the transmission bell housing. I f you don not install the spacer the timing will be off. The v8 engine harness has to be adapted to run on the g35. Once you have the harness done you can have uprev remove the nats security program from the ecm.
Good stuff, thanks for sharing! Your car looks amazing and certainly stood the test of time.
As somebody considering this as my first engine swap that I plan to complete with as little help as possible, I was left with a couple questions.

1) By the bearing that goes into the back of the V8, are you referring to a custom sized pilot bushing with the ID of the transmission output shaft and the OD of the VK45 crank's pilot bushing hole?

2) Is the only purpose of the metal spacer to align the timing notches on the V8 flywheel with the crankshaft sensor hole on the CD009 transmission case?

3) Do you know the details on adapting the engine harness? Is this a major affair where it would make more sense to pay someone 4 digits or is it something a mechanically minded person could figure out without a whole lot of specialized knowledge besides how to solder and use a multimeter?

4) To attach both flywheels did you simply use longer flywheel bolts or did they drill alignment features into one or both of the flywheels so that balancing would stay consistent when removed?

Really appreciate you coming back on here to share how your build held up!
 

Last edited by cswlightning; 03-21-2019 at 01:56 PM.
  #3  
Old 03-23-2019, 08:14 PM
kel
kel is offline
Registered User
Thread Starter
Join Date: Jun 2004
Posts: 281
Likes: 0
Received 9 Likes on 8 Posts
1.) To be honest it's been so long I forgot the bushing I used but i'm pretty sure it's the same one you would use if you were converting an automatic g35 to a manual.

2.) The purpose is for the crankshaft sensor to read the correct timing off the v8 flywheel so the stock ecm can read the timing. Without the spacer you will get continuous crank and camshaft sensor codes popping up.

3.) This is the hardest part of the swap you can use a stock 2006 and up m45 engine harness and a 40 pin connector from autosport wiring. you will have to reuse some connectors from the v6 harness. you have to re-use the top 3 connectors (F1,F2,F3) from the v6 harness located next to the battery + the white connector I believe its F108 and pin them to the 40 pin connector and maybe like 2-4 wires on the stock v8 harness.

4.) The V8 flywheel is very thin, i'm pretty sure you can use the stock bolts from the V6 and be fine.

I'll try to find the where I wrote everything down for the engine harness swap. If not i'll make another one. I've done it so many times it doesn't take me as long lol.
 

Last edited by kel; 03-23-2019 at 08:24 PM.
The following users liked this post:
itgogitrev (04-09-2019)
  #4  
Old 03-25-2019, 05:38 PM
bradass's Avatar
Registered User
Join Date: Feb 2019
Location: North Carolina
Posts: 6
Likes: 0
Received 1 Like on 1 Post
G35 Coupe 5AT - Daily driven - 275+ RWHP
Subscribed

Subscribed.
 
The following users liked this post:
Blue Dream (03-26-2019)
  #5  
Old 04-09-2019, 11:21 AM
Registered User
iTrader: (1)
Join Date: Feb 2008
Location: Cincy
Posts: 976
Received 9 Likes on 8 Posts
Wow, I remember following your original thread back in 2008 when I picked up my sedan. Cannot thank you enough for the inspiration and commitment you had to this project.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
SuprachargedG35
Drivetrain
5
02-14-2018 10:52 AM
G35DuMp
Engine, Drivetrain & Forced-Induction
37
12-02-2009 07:14 PM
Theanimedude
Engine, Drivetrain & Forced-Induction
17
05-05-2008 04:13 PM
KenDude
G35 Coupe V35 2003 - 07
7
02-08-2003 10:54 PM


Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: The vk45de engine swap guide


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: