ok guys I am having a little problem. I am doing the swap in my 2003 maxima. I have 2006 engine from max . changed the upper oil pan and the crankshaft postion sensor not fitting sticking out a little. I purchased a 2003 pan. so I took my vin to nissan and they said for the 6 speed its different so I ordered the so called right one for my 03 6speed. looks the same. is it ok to grind the aluminum a little to get the cps to fit. I am baffled right now. help please

 

Just use your upper oil pan from the 03 engine and it should fit perfect. Yes, the manual and auto upper oil pans are different. That is why you need to use your old one on the new engine. And remember to replace your 2 o-rings and the 2 moon shaped gaskets while you are in there.

 

ok I have given up. 2003 oil pan doesnt line up properly with the engine and the cps not fitting properly. so of right now I am willing to trade my 2006 engine with 69k miles for a running non smoking 2003 engine.

 

Come on, there has to be an explanation, don't give up so easily.
If possible take a picture so we can see the issue. If the oil pan doesn't line up properly with the engine, and you're sure the engine is an 06 Max, then you have the wrong oil pan.
What's the part number for the oil pan(s) you purchased?
The A33B 02-03 model year manual 6 speed upper oil pan part number is 111108J100 or alternate 11110CA001.
For production dates after Jan03 the A34 manual pan is P/N 111107Y000.
When I did my swap I used an 06 Altima engine, swapped the upper oil pan from my old 02 engine, and where the CPS inserts was a bit off (if I recall the engine block and oil pan edges had a difference of a few millimeters depth on the edge) so I used RTV to hold the CPS in place with no issues.
BTW, as Tosheto suggested, why not grab the pan from your old engine?

 

I have done the swap too just like StevieB and I am pretty sure if you use your old oil pan there wont be any issues. Verify that you bought the right oil pan or use your old one, problem solved.

 

hey guys, well here I am so happens my original engine blew warranty company didnt want to replace it.
finally got the engine 2006 and I got a new job so didnt have the right time and all so u took ut to family shop where they had bootlegged mechanic so it so happens that I ended up paying them to do work. then they called me and told me all I needed a 2003 engine which is the original engine to put the inside the car. I told them that how I did my research for maximaforums. and there have been a couple people that have performed the swap. so happens that bootlegged mechanic decide to do anything halfway and try to put a CAM sensor in the cranck sensor hole telling me this is the sensor . thats where I gave up but I went compared a new sensor and installed it and literally shoved my foot up this guys A. well I continued to do the work my self. comes the point he has been selling most of my old mounts and stuff now I am stuck at ordering them and replacing them. yes I have started the car sounda Yummmmmmm. lol guys at maxima forums. I bow hands down to you all with the help I have a video on facebook dont know how to load it here but will put pictures up . soon.
again hands down thanks for keeping up my hope when idiots try to ruin it.

 

Things constantly happen where the forum will say one thing and general mechanic shops say something else and the forum always ends up being right. I have complete faith in this place and always turn here for guidance, general mechanics know alot but maxima.org knows everything about maximas.

 

I also did a swap to an 04 engine into my 02. I used my 02 upper pan. A year later when doing the transmission, I cracked my upper oil. I bought a brand new one but have yet to put it on. If you need to compare pics I have a brand new one at home I can take pics of for an 02 6 speed. Text me if u want eight60 961 0817

 

It depends on the transmission the engines were mated to. If the 08 was mated to a manual you're good to go. However if your 03 is manual and the 08 was auto then you will need to swap the UOP of the 08 to a manual UOP-ie grab the UOP from your 03. I seem to remember someone on the forum or elsewhere posting they had managed to rig/modify the CPS so that it would function with a mismatched manual tranny/automatic UOP but it's not a direct fit.

 

in my 02 max i swapped in an 06 engine and i changed upper & lower oil pan and swapped over the fuel rail and upper manifold and knock sensor with harness and been with the swap 2yrs and no issues

 

I put 07 engine in my 02 6 speed. Parts I used from old engine include: Upper intake manifold, upper oil pan, lower oil pan, fuel rail, knock sensor and harness. Pretty simple swap!

 

You can avoid changing the fuel rail if time is a factor.. The fuel line/rail connectors from 08 to 03 are likely not compatible. I simply cut the rubber fuel line and spliced in a 2 ended metal barb secured with band clamps. I hope you are correct re the UOP being compatible but forum wisdom has in the past suggested otherwise. And yes to the knock sensor swap, as the connector is different if I recall.Good luck!

 

Most engines come without any exhaust on it, so you do not need to worry about O2 sensors. If you use the 03 intake manifold, you do not need to worry about EGR and the plastic VIAS. The harness of the knock sensor is different, that is why I used the old one. The fuel connector was different too, so I used the old one. I also used the old coolant piping because it was missing on the new engine, but I think they should be the same. I am pretty sure you will need your old upper oil pan, but compare parts and if they are the same leave them alone. Swapping a few parts was not that difficult, but no need to change things if they fit and work properly. Good luck!

 

Your car is a 6-speed correct? Did you replace the clutch or flywheel? If the clutch wasn't aligned properly it will prevent your pan from aligning up. If that's not the case then, your oil pan has a metal plate in it, try swaping the other plate in your old oil pan. If that doesn't work then remove it completely. That's what I had to do to get it to align. There is no big need for this anyways.

There are little rivits on the block that should align up without a hassle if you did this correct.