Man, quoting my own post. lol I have found out since posting this question that a 2007 up Altima 2.5 crank will fit the SE R Spec V BUT, it will not have the 8 counter weights on the crankshaft like the Spec V does. Also the rods are not as strong in the Altima. also any engine that says it is a SE R Spec V engine but came with a CVT transmission is NOT a spec V engine. Only the SE R Spec V has a 6 speed stick, none of the engines with a CVT transmission will have the 8 counter weights and will not be Spec V.I am about ready to throw in the towel, this engine is kicking my butt. I just carried the crank to have it turned, no can do unless they weld up one journal. Question will a crank from a 2008 altima 2.5 fit this engine? Is there any crank other than a SE-R Spec V crank that will fit.
If I go back with the same kind of crank I have now, will the engine shake like crazy if I disconnect the balance shaft?You are getting hung up on the crankshaft and the transmission type needing to be aligned.
This is not true Jim.
You can use any Cranshaft with any Transmission.
You will not have any problems, especially as a daily driver.
If this was a performance mod, I'd advise otherwise.
To get back on the road and drive as a normal car, any Crank in that year set (07-11) will be okay.
Man, that is cool, how did you get it? Thanks for the information, I appreciate it.Turns out I have an 08's FSM on my phone
Cricki, I do have the FSM on my computer. I may have misunderstood that you could also get it on your phone. One more question, what are mount inserts? I may have asked that before, CRS ya know, can't remember stuff. lolThought you said you have the FSM what ever the case, that is all of them for that year in the link above, I think they are somewhere on this site but it was easier to get a link from the other place.
MoltenNismo , if that is the vin # that engine did not come out of this car. The top picture is the engine # the other picture is the actual vin # of the car.If you do use this 4CW crank, I would advise not to rev it to the 7k redline. The Spec V used the 8cw crank for a reason. Some people have revved the 4cw crank past 6500 or even 7500 and had luck so take it with a grain of salt.
Also as for the stamping, I was actually looking for this stamping. It should be in the back towards the #4 cylinder by the crank sensor. We obviously know that your car was swapped out due to the crank, but I forget if you mentioned that it was. Plus the vin is there too just to see if it matches the car.
View attachment 170971
Molten, that is what I did last night, ordered just what you just listed. No I had no idea that the engine had been swapped. That must not be a vin # as there are only 16 digits instead of 17. I also ordered new bolts from the dealer except for the head bolts. The flywheel, balance shaft, and reluctor wheel bolts cost me $146.00 man they are in love with their parts. I also ordered the dowel pin to mount the reluctor wheel correctly. The dealer parts kept telling me is shows it has 5 dowels. Nope look at the wheel, 4 bolt holes and one dowel hole. They had no idea what was what. I just hope I get the right bolts.Yup. That was swapped in from an Altima. JA0 is the 07-12 Altima block. The SER/Rogue blocks should have ET80 and the Spec has ET81.
Did you know that somebody swapped it over?
You could probably just buy a 4cw crank, spec v rods/pistons and call it a day. The parts catalog shows the same crank was used between altima, rogue and base SER. The FSM doesn't show different measurements between the base SER vs Spec V QR25DE. Don't quote me on that, but I don't see why it wouldn't work. Probably just don't rev it as high if you're using the 4cw crank?