I have 170k+ miles on my 2004 sedan with A/T. The engine has started giving me problems, and it's understandable cause I drive it pretty hard. I am looking at replacin it asap. I obviously want the newest/best engine I can afford to put in it. I can probably afford 3.5k max. I heard I could put an 05 motor in it. would that be a straight swap or not? If so, is that the newest engine that can be s direct swap? I'll change motor mounts, just because when I do the swap. I really just want to know so I have more options when I'm shopping around. Also,I don't know if I have a long block or a short block, would it matter? How do I know which one I have? are the engines from the coupes or the 350z's compatible for the same years, or do those have different years I can swap for? Thanks for any help guys, I tried to find a thread on this before I asked but I couldn't find any.

Let's begin with a lesson, short block is just the block with pistons/rods installed. Long block is a short block that also has heads, the two combined make a long block. What you have in your car is a complete engine or long block...understand? Installing a '05 engine in your '04 should be an easy swap with little or no changes!
Gary

Awesome, well now I know the difference. I thought it was the length or something, like a small block V8 vs big block V8. Thanks, is a 2005 the newest year that should be a straight swap? I still owe almost 6k on the car, I don't think I could sell it in its condition and break even, so i don't have a choice but fix it.

2005-2006 sedans have the same engine. The non-revup 2005-2007 coupes do as well.

So basically, any engine 2003-2006 maybe 07 coupe will fit as long as it's not a Revup, and a long block is just more of a completed engine. Awesome, thanks guys. Is there any thing else I should know?

Are you DIY or paying a shop?

I'd prob go long block unless you are 100% sure your heads are ok. If you get a short block, you'd need to swap your existing heads over to it in addition to intake, and all other engine components.

A long block is not a complete engine, so you will need to strip your engine of items to install on this engine,

This is close to what you'd get if you ordered a long block. Heads on.



This is close to what a short block would be. basically engine block with crank, rods and pistons installed. No heads or upper valvetrain

If you can go long block. and get exchange on the old block if possible. less to troubleshoot.

I always though long vs short had to do with stroke?

You thought wrong.

ahhhh .... no

lol so i've heard

I'm doing it with a couple friends. I can't afford an engine and install. I'm getting a used engine, just low miles... well lowish. 65k. My mom said she might help, of so. I might be able to get a new one, but then I don't the cash for all the gaskets and stuff I'd need. on ebay, most of them look more complete than the long block you showed. I'll only have a few days to switch it over. It's my only ride right now.