Hi, I have 2006 S2000 & blew a head gasket which caused the head & block to warp. Roughly .002" - .003" was taken off the block to level it. However, the machine shop took too much off the head & it looks like i can no longer use it.

I found a couple forum members who have AP1 heads to sell, but I know the casting is different for the 2006 & up becasue the air pump was removed for the 2006+ models. I researched the forum, but only found speculation on how to make an AP1 head work; I couldn't found anyone who actually did it.

I'd like to know if anyone knows how to actually pull this off or has actually done so?

- How do you close up/plug the air pump ports in the AP1 head to work w/ a 2006 AP2 block?
- Will my 2006 engine harness, intake manifold, fuel rail & all the hoses be plug & play with the AP1 head? If not, which components wont work?
- Will my 2006 cams work w/ a AP1 head?
- Will the 2006 ECU work fine w/ the AP1 head, considering the 2006 is a 2.2L & the AP1 was a 2.0L?
- I still have my 2006 OEM valvetrain (valves, springs, retainers, guides, keepers, cams, rocker assem, cam caps, etc.); will all this fit plug & play in an AP1 head?
- Other than the AP2 retainers being a little better, is there any diff in the valvetrain between AP1 and a 2006+? Are they interchangeable?

I really need some help/advice. It's next to impossible to find a head from a 2006+ so it looks like my only choice is to use an AP1. Also, if anyone has a head to sell whether it's AP1 or AP2, or knows where to get one please let me know. Thanks

 

OP, can you update this thread with a link to similar thread where Billman has conclusively answered? That way if someone else looking for same answer finds this thread first, they will get the real answer.

I woukd do it, but using phone app, which makes it...less than easy.

 

Sure, so here's the link for where Billman gave info on using an AP1 head with a AP2 bottom end.

https://www.s2ki.com/forums/s2000-un...2006-a-605000/

not sure if just copy & pasting the link the best way, but that's the only way I know how to do it. I hope it helps people out there who need this info & thanks to Billman for the info.

 

Posting identical questions in multiple locations just fragments the responses.

You milled the block. Not sure what effect this will have and it was noted but not answered in either of these fragmented threads.

-- Chuck