JAY25

iTrader: (38)

Someone put me on the spot and a challenge to do a 3.5 swap on a 4th gen. Okay today went over and started at 8:30PM, removed the following
just about all

the harness connections, vacuum connections and tranny in an 1hr and 30mins.

Someone that has done the swap the following just to do a direct a swap without taking the block down into pieces

1. Remove all sensors from the 4th gen engine and mount it onto the 3.5

2. have to tap into the 4th gen harness to tap into the 3.5 injector harness

questions

3. What fuel rail can I use or can I move up to a 370cc injector etc...?

4. what about the header, reuse the 3.5 header or reuse the 4th gen header?

5. I was told that the 3.5 has a coolant hole and that has to be tapped so got that one

6. cables for the throttle cable and TPS sensor how do I relocate that?
reuse the 4th gen throttle body?

7. Upper and lower oil pans, reuse those from the 4th gen or leave them on?


8. do I need a higher high flow fuel pump i....e... walbro?

can I use the 4th gen PS pump, alty, and AC Comp on the 3.5 engine or do I have to buy those?

9. Can I install a UDP for this 3.5?

10. Can I reuse my fidenza and ACT?

thats it for now

any help from Tilley or anyone that has dropped the complete engine in there would be appreciated!!!

Stephen Max

iTrader: (59)

I'm about to do a swap this weekend, so I've got a lot of the answers.

3. I'm using the fuel rail that came with the engine. It may be the same as the VQ30DE-K, but I don't know that for a fact. You won't be able to use the VQ30DE fuel rail, though.

4. VQ30 headers fit on the VQ35.

5. Yep.

6. I'm fitting a Pathfinder throttle body onto the IM. The throttle cable bracket will have to be attached to the IM somehow. I'm drilling and tapping some holes for the bracket. I'll take some pictures when I do.

7. I'm using the VQ30 upper and lower oil pans in order to use the VQ30 crank position sensors. I read that you can use the VQ35 upper if you drill the CPS mounting hole deeper. I'll have to check on that, though.

8. Probably not a bad idea to use a Walbro FP. All engine accessories bolt right on if you use the VQ30 oil pan.

9. I think so. My customer wants me to install one.

10. Yes.


If anyone has any corrections to what I've written, please don't hold back.

Nismo3112

iTrader: (12)

^ For #7, I think the 3.5 upper pan already comes predrilled for the CPS.

JamesNH

iTrader: (12)

wheres number 5? i have a 2k2 fsm if you point a location next to something close.

Nismo3112

iTrader: (12)

#5 is on the firewall side of the engine, between the heads and upper oil pan. Its hard to miss.

Stephen Max

iTrader: (59)

It is predrilled, but from what I understand, it positions the CPS a bit too far away from the VQ30 timing ring (which you also have to use, I believe).

ref: http://forums.maxima.org/showpost.ph...3&postcount=13

EDIT: Apparently the VQ35 oil pan works fine. See JClaw's posts below.

Stephen Max

iTrader: (59)

You also have to enlarge this hole in order to use the VQ30 timing cases (thanks to Nismo3114 for the pic):



And you have to drill the intake cams in order to reposition the dowel hole, like so:



And, you have to have cam spacers (thanks to Japmaxse for the pic):

Max4Speed

iTrader: (20)

Thanks for the replies guys. Here are the progress pictures...




Bye Bye VQ30




Tranny and a few other things off.

chris'smax

iTrader: (3)

Ahhhhaaa. Thats why i saw you lurking in the 5th gen forums. Ossamah you sneaky ****.

Max4Speed

iTrader: (20)

In the process ended up posting the headers question and got flamed. I hope everything works out okay. Technically I can lurk in teh 5th gen forums because of my 2000 I30T

Been reading about your car.. Finally up and running?

chris'smax

iTrader: (3)

Ha more or less. Dropped it off earilier this week to get a oil leak fixed(under the warranty of the mechanic). I found out that i had to big of a belt on so He swapped that out and has to retune the car. I think he said he saw 13 psi yesterday and this was without the CAI setup. Needless to say i am pumped because befroe i was only getting 9

JAY25

iTrader: (38)

Stephen and Nismo3112 thanks alot for the picture and the help and tips, really appreciate that!!


the car needs about most 2-3 hours labor to pull that engine goodbye and we can trash it after we transfer parts over!!!

JClaw

iTrader: (17)

By the way, you can leave the 3.5 oil pans on, both of them. That is what I used. I removed the 3.5 oil cooler, plugged the two 3.0 sensors into it, and that's it. Works fine and has seen many 5-second 0-60s.

Nismo3112

iTrader: (12)

Good luck guys. Can't wait to see more 3.5 4th gens

Stephen Max

iTrader: (59)

What flywheel/flex plate did you use, VQ30 or VQ35?

JClaw

iTrader: (17)

All VQ30. I used as many VQ30 components as possible to make it simpler. VQ30 Tranny/Flywheel/Clutchnet 6-puck/Sensors/Master Cyl. ect ect ect.

Can't wait to see 12-second N/A 4th gens... Krismax and Tilley will get there first, and I won't be far behind.

IceY2K1

iTrader: (3)

Jay,

Not to bother you with minor details, since you've got bigger issues to solve, but to use the 5.5gen injectors and return style rail, you'll need to add a FPR in place of one of the 5.5gen dampers like Nismo3112 did here:

JAY25

iTrader: (38)

where did you guys get that return fitting from? Oss is willing to get what ever needed for the car. Hes staying NA. Look is nice to get into a car thats not boosted yet fast.

I drove a E 46 M3. I put it on sport mode as the owner stated and holy cow that thing had some scoot to it . Yet it is NA. Its a 3.2 or 3.3. We are going to a 3.5 so hopefully we can get this car to scoot just as hard.

I told Oss he needed to trash that stock clutch. Basically what these nice guys up there are telling him. Stock clutch wont hold over 300HP to the crank. My goal is to get him as close to 300 the ground as possible.

I told him if no boost to install a 50=60 wet NOS kit for extreme emergencies and he should be able to scoot as hard as a Boosted Cobra from a slow roll

IceY2K1

iTrader: (3)

It's just his '95 FPR. He had to do some dremeling to make it fit.

The 5.5gen had a returnless setup, therefore two dampers and no FPR(at the rail, but one in the tank), however for this car you want to replace one of the dampers like Nismo3112 did to keep your fuel pressure/volume in check before it returns to the tank.

Or you could keep the stock 5.5gen returnless setup and figure out how to mount the 5.5gen fuel pump which includes the FPR into the 4th gen tank.

Stephen Max

iTrader: (59)

No. All you need to do is put a tee in the fuel line between the fuel filter and the fuel rail. One leg of the tee goes to the (unmodified) fuel rail, the other leg goes to the fpr and from thence to the return line to the tank. Voila, a returnless system, as far as the fuel rail is concerned.

JClaw

iTrader: (17)

Use 1995 FPR.

4thgenx42

All of this is just so confusing. I have a simple question would 3.5 complete sap just fit into the 4th gen? I see alot of people having to swap parts from like pathfinders, also using some 4th gen parts. I am so interested in doing this swap but im getting confused. Everyone seems to be doing different things. Has anyone come up with a list of things to buy-look for- or do? HELP PLEASE!!!

LeX

iTrader: (14)

hey Jaime fancy doing a 2000 VI sometime

Stephen Max

iTrader: (59)

This thread pretty much covers all the issues, but I'll relist them for you.

This is based on an engine-only swap, i.e. you are keeping the A32 ecu and wiring harness.

1. Remove VQ35 inner and outer timing covers, timing gears and timing chains. Replace with VQ30 timing covers, gears and chains. Use the VQ30 cam position sensor.

a. Drill intake cams for dowel holes (see the pics above in this thread).

b. Enlarge two holes in the inner timing case (see the pic above).

c. Buy cam spacers and put them behind the cam timing gears (see pic).

2. According to JClaw, you can keep the VQ35 oil pan. If you keep the VQ35 oil pan, you can keep the VQ35 oil filter cooler and you don't have to plug the coolant hole on the backside of the block.

3. Replace all injector harness connectors with VQ30DE-K or VQ35 connectors.

4. Make an adapter plate for whatever throttle body you are going to use. You can't use the VQ35 throttle body because it is not cable actuated.

5. Make a mounting plate for the 4th gen IACV and route the idle air hose to somewhere into the intake manifold.

6. Get a Summit rpm switch to control VIAS activation.

7. You will have to remove all of the ignition coil harness overwrap in order to be able to connect the ignition coil harness connectors to the coils. Rewrap with electrical tape once you have them rerouted.

8. Get an adjustable fuel pressure regulator and tee it into the fuel line going to the fuel rail.

I have probably forgotten something, but this will get you started.

deezo

iTrader: (3)

Good for u man. Now you'll have some extra power for those wheels.

Max4Speed

iTrader: (20)

Well I decided to call off the project. Didnt have much time to put into it. PS been busy modding the house

vsamoylov

so basically the car jsut sits there and the project is scraped?

Max4Speed

iTrader: (20)

Not really. I do have a spare VQ30 sitting around that I might throw back in. I am not really worried about it since I have a 2k I30 as daily driver I Wish I had time to fiinish it up though.

SonicDust187

iTrader: (11)

Why is your maxima retired?

Nismo3112

iTrader: (12)

I'd like to know also...

vsamoylov

well lets just say its no longer in california.