well im doing a head swap putting a f23 head on a f22 block and i need to know the head bolt dimensions and thread pattern for the smaller bolts. like i said need help and i have looked everywhere on google cant seem to find them for some reason. i would greatly appreciate the help as soon as possible. thanks honda-tech

 

Cylinder head bolts -
Short - 12 x 1.25mm x 163mm
Long - 12 x 1.25mm x 199mm

IIRC they are the same sizes as the F22/H23

 

thanks man i hope this works for me

 

yeah im putting a f23 on a f22 and the boltshave to be for a f23 but it should help cause its going from non to a vtec

 

I thought that the F23 head won't work with a F22 block? I know there's a thread on here about a guy who did that F23 Head all PNP, etc and at the end only to find out, two of the four cyl won't contribute. We'll just have to see then eh?