PJ0 and PH4 pistons interchangeable ?

[Luis 89LXi]

I working on my 89LX restoration project, my originally installed A20A1 has the crackshaft broke in half, so think this block is bad. I bougth an used A20A3 but this have a bent rod, i take this good crank to the shop and they machinned to 0.025mm i have all rod and main bearings, so block and crank is OK. question is about pistons w/rods.

I plan to use this A20A3 whit its own 3 good pistons and use one good piston from the old A20A1, can this be done ??.

I read the numbers stamped on this both pistons here they are by location:

..................A20A3.............A20A1
top_piston......PJ0................PH4
side_piston.....PJ0..HF4.........PH4..HF27
Rod...............PC6..43..........PC6...59
conectin_rod....M2.................K2


so i plan to use 3 pistons PJ0 and 1 piston PH4, can i do that ? is all same pistons for A20. they all look same and i measure and they're same size.


Luis

[shepherd79]

Luis, you don't want to use diff pistons. trust me.
as you know carbed and EFi accord motors had diff. compressio ratio.
so, this is what i would recomend for you.
contact Dimond pistons and order 10.5:1 or 11:1 pistons. you will be happy in the future.

[Luis 89LXi]

Hey Alex what if i use all PH4 from A20A1 on my A20A3 block ? this can work ?

i don't have nice chance to order stuff since i live in mexico, if order stuff i have to travel to U.S. south border on my cousin house to pick them up.

Luis

[shepherd79]

actually i would say go with the other one PJ0.
they may give you better compressio ratio.

[Luis 89LXi]

OK i'll work on PH4 from the A20A1 block. Thank you shep.