D15 Cranks and Heads

[whealey]

Are all D15 series cranks the same ie. D15B1, D15Z2, D15B4.
Also would the heads be all interchangeable.
they are all 1.5 carby engines note that one is a Z

[SeverAMV]

not all d15 cranks are the same. there are audm eudm, usdm, jdm models of each d15b1, b2, b4, b7, b12, etc.

most heads are relatively interchangeable, but obviously you will have difficulty running an efi head on a carby motor or vtec head on a motor that didnt originally have vtec unless you get the bits to match. (ie. might need electric fuel pump for efi head if the cam doesnt have the fuel actuating lobe, etc.)
and there are a fair few different cranks used in each one as well.

[whealey]

great thanks for the info. i decided to rebuild the origonal engine D15Z2 and the crank will be fixed.