i wouldnt rebuild an N motor again, they wear heavily: barrelled bores, shorter rod is the culprit for this wear.
best bet would be to get hold of a late 2.3 single VVT engine and just fit your N head after its been skimmed, valves/guides checked and tested / new stem seals. these are short skirt pistons with a 147mm rod, much much better at not wearing its bores out.
the later block has far superior oiling, a vastly lighter crank, windage ports at each cylinder base and can facilitate all your N parts aswell as a better PCV port size. RN oil pumps are 5h1t3, use your 850 one after youve opened it and inspected and cleaned it.
you could use a B5244t5 bottom end also, but they cost more to acquire due to being the more desirable of the 2.
Speak to Sebastien Schutten
