Originally posted by Trickturn
the combustion chamber/piston dome size is NOT and issue when putting h22 pistons into the h23 block. its a matter of compression height, the h22 has a higher compression height, stick h22 pistons in a h23 head and the sides of the piston WILL hit the head. we learned this the hard way. the h22 piston sticks out of the top of the block slightly when put in a h23 block. its not the dome that hits it the flat part on the sides that hits.
it's because you used the wrong rods. wrist pin placement differs slightly, causing the H22 piston's ring land to protrude above the deck.
a thicker headgasket can remedy this or a deck plate or even custom rod lengths... tho goin with a slightly shorter rod will throw off your rod stroke ratio to an even more undersquare situation.
machining of the head will do, but you'll end up spending too much for too little.