starting tommrow i and a couple of my freinds will be removing the engine from my 02 maxima 6 speed. i found a 2006 engine with 93000 miles to put in it. i am going to be doing the timing chain tensioners and guides as well as gutting the precats and hopefully getting away with the non fouler trick ive bee reading about. i have a couple big questions
1. does the engine wiring harness need to be swapped
2. do any physical parts on the engine need to be swapped
3. should i drop the subframe or remove engine from top.
4. anything i should know related to the computer

every single person has told me a 06 motor will not go into a 02 maxima(but ppl on here said it can). its scaring the **** out of me. also, because of lack of money (times are tough) ive had to resort to my freinds to do the swap. im 20 and the two freinds are 22 so you can see why i am worried. one of them did go to college for auto mechanics and he has a freind that is a ""maxima expert"" so i guess i have that going for me. i need any advise you can give. also, i will be tearing down the old engine completely so if you want me to part it out on here let me know, otherwise im going to rebuilt it and keep it for a spare

 

I assume you are aware tbat if the engine was mated to an automatic transmission that you'll need to swap the oil pans. Ditto for the front and rear (driver -passenger) aluminum motor mount portion that's mounted on the engine block.
1 no
2 see above, and you may find minor differences for brackets, and possibly the fuel line connection (use a barb and hose clamps if required). I don't recall anything else that needs to be swapped from your old engine. Oh wait, probably your upper intake manifold also, unless you block off the EGR on the 06 (pretty sure the 06 has an external EGR valve, the 02 does not).You need to swap the crank sensor if you swapped the oil pans.
3 I'd recommend you drop it if you have a lift. Without a lift I'd probably pull it.
4 nope

 

I have 02 SE 6 speed and done preparing my 05 motor to be put in.

1. Use the original harness.
2. If the 06 engine is auto you need to swap the upper oil pan and crank position sensor. I also swapped the knock sensor and harness. Swapped fuel rail and also intake manifold and throttle body. EGR went to the garbage.
3. As stated above if you have a lift drop it. If you don't, take the hood off and lift it out.
4. No. You keep your ECU.

 

good luck. should be straight forward. only differences other than the upper oil pans and driveplate/flywheel is maybe a sensor or two is different and you would have to swap them.

I swapped an 05 altima 2.5L into my sentra SpecV years ago and had to swap a cam sensor and ofcourse take the drive plate off and install my flywheel(use new oem bolts)

 

everything has been stated above but:

1. unhook the harness from the engine on 02 and leave it with the car, drop the 06 engine and reuse original harness.

2. if its auto, swap over upper oil pan.
2b. swap over flex plate.
2c. swap over crank sensor.

3. swap over knock sensor.

4. swap over lower and upper intake manifolds with the fuel rails.

5. make sure you at the very least replace the timing chain main guide on that 06 motor.

No need to do anything on the interior including messing with the ecu. When I do these swaps, the doors stay closed and all work is done under hood.

I find dropping the motor easier but then again, I have a lift to work on.

Overall, this swap is easy and straight forward. Just a matter of swapping parts.

Good luck and let us know how it goes.

 

thanks for all the replies. is there any way i can use the new harness with the throttle body. only reason im asking is i had a couple of codes being thrown for the cam sensors and the iacv valve so i was kinda hoping to just swap it with all the 06 stuff. is this definetely not possible.

 

also my clutch has about 10k miles on it. i do have a vibration when letting out the clutch and when gently resting my foot on the pedal. should i put a new clutch and flywheel or just flywheel? the previous owner did clutch so i do not know if he did anything with flywheel

 

You can use the 06 manifold, but you will need to block off the EGR hole

 

Its a simple drop. Do the timing tensioners while the motor is out. All 04-08 motors will eventually rattle if you don't.

 

Just as a update I have found some interesting things. One of my fuel injectors when pulled out of the manifold didn't drip at all so I guess you could say it was barely working. Also my rear valve cover gasket failed filling one spark plug hole completely with oil. Another was also lightly coated with oil. Its amazing this thing even ran. But i have all wiring removed from engine as well as radiator and manifolds. Just trying to keep everything somwhat organized

 

Take some pictures and post em, its always nice to see them

 

and make sure the flywheel is lined up correctly with the marks on the teeth of the flywheel or else the car will have a hard start and no tach signal. i have had it in 2 of my maximas

 

http://forums.maxima.org/5th-generat...o-5-5-gen.html

 

harness is different due to a different knock sensor wiring and of course different transmissions.

 

you should replace the clutch if you're resurfacing the flywheel since it has been worn into the old flywheel.

 

Pick something better.

Kseries, 4g63, 4b11t, hell even a b series is better than some gm 4cyl garbage.

Oh... If you have to ask how to do it you don't have the skill or knowledge to actually do it.