ENGINE SWAP 2006 3Z0Z TO A 2003 G35 SEDAN

[TITANG9]

What’s needed to swap a 2006 350Z Engine (manual transmission) into a 4dr sedan Infiniti G35 2003 with automatic transmission? Could I swap the flywheel?

[Sentientbydesign]

I would suggest that you swap an automatic engine into your automatic G35. The 6mt (manual transmission) G35 and 350z after 2004 have the "rev-up" engine. The torque curves are different with the automatic (non-rev-up) producing more peak torque and less peak horsepower.

Although your project isn't impossible, it's not recommended. The different redline and other possible connectivity issues (ECU) could be a head ache.

[evildky]

the flywheel question left me scratching my head.......

are yu attempting to ask if you can swap the manual trans and flywheel to your stock motor? if so es you can, but you'll also need a pilot bearing, starter, driveshaft, wiring etc might require addition mods but yes the 06 trans and flywheel will bolt to your 03 engine

[TITANG9]

Well, a guy is selling me a 350Z engine with clutch & flywheel (no transmission) +25,000 miles on it for $750 without the exhaust manifolds and crankcase cover.I just want to know if it fits perfect into a 2003 G35 automatic sedan (4dr). I would like to swap flywheels and put it into my automatic transmission.

But as “Sentientbydesign” mentioned above, I’m more worried about ECU problems, connectivity issues, Variable Valve timing and all other stuff.

[TITANG9]

Are there any web links related to this kind of SWAPS?

[evildky]

so you tanked your 03 VQ35DE and want to swap in an 06 VQ35HR?

what did you do to your engine? if you havn't thrown a rod I'd recomend rebuilding your engine over a swap

I believe the only real chages to the HR were internal to the heads and the intake manifold which is interchangable but flows better, so yes I blieve you can just bolt the HR in but if in doubt just swap the short block

and the donor is form a man trans car so it has a flywheel bolted to it, so yes you'll need to bolt your flex plate to the engine in place fo the flywheel, there might be a spacer with the flexplate as with most nissan automatic's from my experience

[TITANG9]

II think the 350Z 2006 is a more powerful engine than one in the 2003 G35, that’s why I’m incline to do this swap.My engine has 125,000 miles on it but in good condition. Thing is, a guy is selling me this whole engine for cheap ($750, including coils and all stuff) plus it is a “rev-up” engine…NOT HR; the 350Z HR engine came only in 2007+. So I think it is a bargain plus is not bad to have a spare engine. This 350Z engine has only 25,000 miles…For what I heard electronic stuff could be different: like the variable valve timing….this is why I’m looking for more info.

[Sentientbydesign]

so you tanked your 03 VQ35DE and want to swap in an 06 VQ35HR?

what did you do to your engine? if you havn't thrown a rod I'd recomend rebuilding your engine over a swap

I believe the only real chages to the HR were internal to the heads and the intake manifold which is interchangable but flows better, so yes I blieve you can just bolt the HR in but if in doubt just swap the short block

and the donor is form a man trans car so it has a flywheel bolted to it, so yes you'll need to bolt your flex plate to the engine in place fo the flywheel, there might be a spacer with the flexplate as with most nissan automatic's from my experience

Old Z people don't know their new engines. The VQ35DE came in two basic variants for RWD. The standard 6600 redline producing 280 hp and the 7k redline with variable exhause producing 298 hp. The VQ35HR came out on the 2007 350Z and 2007 G35 Sedan (coupe never saw it) and had revised internals, 7500 redline, dual intake with a vastly improved plenum producing 306 hp (this varies a little).

TITANG9

First off, you can't use the flywheel in your automatic. The flywheel on a manual is completely different than a "flywheel" on an automatic. Second, the both automatic and rev-up engines have variable valve timing. The rev-up has some sort of variable exhause (feels like V-tech at 4k).

I don't mean to be rude, but based on your questions, I'd say you don't have enough mechanical experience to do the swap. This is something I'd send off to a performance shop that's experienced in engine swaps with complex wiring issues.

[evildky]

yeah I know I srewed up, honestly, if the "rev up" doesn't deserve it's own designation then why bother

[TITANG9]

Sentientbydesign,Hehe, probably my English was not quite well, so my question was somehow misunderstood. I am an automotive technician (with License) with over 20 years experience; I’ve been doing engine swaps since 1988, and also, used to be an old “Z” (240Z to 300zxturbo) car fan/owner and turbo racer. I’m not working as a mechanic anymore…just for me or my family; more computer (desktop) inclined nowadays!!I own a Mustang GT ‘97(4.6) ‘going to swap a COBRA engine soon’, Acura RL 1999 and the Infiniti G35 2003. Though I used to be a quite good pre-1990 “Z” technician, I don’t have enough knowledge/experience on the new VQ35DE and its relatives, so to speak.I just want to be sure that I could swap my ‘automatic flywheel’ onto the manual crankshaft of the 350Z. I ask this, because in some Mustang models, you can’t swap a manual flywheel onto an automatic crankshaft or viceversa….bolt pattern and number is different (6 vs 8 holes) in some models or years. By the way, I do have the “Shop Manual (the Bible)” for the 2003 G35 but not the 2006, that’s why I can’t compare engines or wiring connections.Does this clarify better my question? Hope it does!!  hehe!Thx for the info and I’m glad to be learning from this site.

[bmike818]

good stuff!

[raremotive]

http://www.nicoclub.com/FSM/350Z/coupe/2006/

This is a 2006 shop manual for the 350z.

From the sounds of it, you want to keep the automatic. Which the original post sounds like you want to convert to a manual.

You should tell us your intentions and your questions regarding your intentions. This is good communication regardless of language you speak.

To not end with a harsh note. I bid you good luck on completion of the swap, it shouldn't be too terrible of a difference... like the de as to the hr VQ's... all though... I am not sure 2006 had drive by wire throttle control instead of linkage.
Modified by Rare_f8 at 2:52 PM 12/31/2008

[Sentientbydesign]

Sentientbydesign,Hehe, probably my English was not quite well, so my question was somehow misunderstood. I am an automotive technician (with License) with over 20 years experience; I’ve been doing engine swaps since 1988, and also, used to be an old “Z” (240Z to 300zxturbo) car fan/owner and turbo racer. I’m not working as a mechanic anymore…just for me or my family; more computer (desktop) inclined nowadays!!I own a Mustang GT ‘97(4.6) ‘going to swap a COBRA engine soon’, Acura RL 1999 and the Infiniti G35 2003. Though I used to be a quite good pre-1990 “Z” technician, I don’t have enough knowledge/experience on the new VQ35DE and its relatives, so to speak.I just want to be sure that I could swap my ‘automatic flywheel’ onto the manual crankshaft of the 350Z. I ask this, because in some Mustang models, you can’t swap a manual flywheel onto an automatic crankshaft or viceversa….bolt pattern and number is different (6 vs 8 holes) in some models or years. By the way, I do have the “Shop Manual (the Bible)” for the 2003 G35 but not the 2006, that’s why I can’t compare engines or wiring connections.Does this clarify better my question? Hope it does!!  hehe!Thx for the info and I’m glad to be learning from this site.

Ok, that clarifies things a little. I suggest you take a look at the link that Rare_f8 posted. That should answer the flywheel question. Whether you can run VQ35DE rev-up with a non rev-up ECM is very questionable.

If I were going to do an engine swap, I'd go for the VQ35HR, the benefits of the rev-up are small in my opinion and not worth the work.

[TITANG9]

Guys, sorry for the late answer....Holiday vacations. Well, to my disappointment, I think Sentientbydesign is correct.

Engines can’t be swapped without making heavy ECU modifications; which I’m not inclined to do ($$$$$) at this moment.

Thx for the help guys!

[rmezz13]

TITANG9 e-mail me regarding this, please.