My Prelude's timing belt snapped and I bent some valves in the head, so it's sounding like ****, smelling like ****, and guzzling gas now. I can't seem to find a B20A5 head for cheap, but with all of the LS/VTEC kids, it's easy to find a cheap B18A/B head... So, what do I need to do to make a B18A/B head fit on a B20A5 block?

I've heard that it can be done, but it's not quite as interchangable as other B-series parts. I need to know the specifics. I don't want any surprises when I try to put it together. Do I have to modify anything to get it to bolt up? Which head gasket would I use? Thanks.

 

well if you can bolt a b16 head on a b20 then and on the b18 then why not a b18b1 head on a b20?

 

This is a B20A block in a 3rd gen (88-91) Prelude. It's the same bore as the B18, but has a longer stroke, and possibily a closed deck design. Someone said there were some issues with using a B18A/B head on it, but I need to know the details.

When people say B20, they usually mean a B20B or B20Z out of a CRV, which is just like a B18A/B with a few mm larger bore.