swapping N62 motors

[rbryantaz]

Originally Posted by BigBody

Thats pretty strange. According to realoem, they do not bolt up, as others have reported. On the N62 4.4i the manifold port (from the top) points, 'right left right left'. On the 745/750, the ports point, 'left right left left'. Have a look...

RealOEM.com - Online BMW Parts Catalog

https://www.realoem.com/bmw/enUS/sho...diagId=11_3588

For a 4.8is the setup is also different. It is 'right left right right'.

https://www.realoem.com/bmw/enUS/sho...diagId=11_3608

That is also what I have seen. I guess the N6244 was the same between the cars and the trucks where the N6248 isn't.

Either way, the good information is that there are several exhaust manifolds and bolt patterns in the N62 family and they sometimes require drilling and tapping if you mix and match.

I was expecting only one side to be different between the e70 X5 and the engines I looked at from an E65 750i. Which is also different than the 4.8is. It probably all just comes down to how the exhaust manifolds fit best.

Did you happen to look into swapping an N62B48 engine for the extra 40hp/40ft*lbs instead of putting another 4.4l engine in? Would it take more than just changing the control module?

-Rich