Before I start yes I have researched about this topic and haven't found the answers to my questions. So I bought a built H22 P13 head with skunk2 internals (springs, retainers, valves) and OBX stage II cams which I will not use! I was going to do a G22 build but later I found out that the blocks bore (85mm) and the heads combustion chamber (87mm) does not add up unless I bore the block but I have intentions of boost to I didn't want to bore the iron sleeves for a little insurance. Then I bought a PCB F20B manual head with Type S cams and I found out that the combustion chamber is 85mm so it will mate perfectly. So by adding the F20b head will I have to press on the H22 water pump and use the H22 timing cog and use half and half on the water pipe?
Also has any one machined the valve seats +1mm over to fit h22 valves on a f20b?

 

you dont press on the water pump, they bolt on. I would think you just use the h22 bottom end components. You need to move this to forced induction they will have more knowledge about the issue

 

also you're right , the f bottom end can only be bored to 86mm with boost but you can go a little thinner with n/a

 

Well if I had questions about turbo I would but these are just questions on a build. I heard you have to press a h22 water pump because the h22 water pump doesn't bolt up to the F block.

 

Bump

 

The water pump gear from an H22 must be pressed onto the F22 pump.

 

Yes ^ you must press the h22 gear on the f waterpump.

 

Got my Manual PCB F20b head mocked up yesterday haha ��