Bought a 2000 D2 4.0 and was hoping to bring it back to life. PO put a lot of money into it and might have been a little misleading about why it didnt run. I’m stuck with this one with no compression on one cylinder with new heads, timing chain plus a lot more. I was hoping to find a 4.6 short block and swap over all the new parts onto it. Is this possible?

 

From what I understand, the is no difference between the 4.0 and 4.6 blocks. What changed was the crankshaft stroke and longer rods for the new stroke and possibly an oversized piston.. So all the 4.0 parts should bolt to a 4.6 shortblock.

 

That's correct. The bore size/piston size is also the same except the 4.0 piston is a slightly taller compression height. From what I've been told, though never confirmed, the 4.0 pistons in a 4.6 would make for a little less than half a point of increase in compression, but that's a moot point if you're swapping the whole rotating assembly.