I remember seeing a post a few weeks ago about how to tell which pistons you have (a/b) I can't find that post anymore (it had pictures and stuff)

Can anyone point me in the right direction on where the hell on the block it is stamped? Is there anyway to tell without removing the head or other parts?

 

back drivers side, down low........you can also illuminate the cylinder itself (through plug hole and see the stamp......i discovered this last week

 

will I be able to see it easily on the block? I jsut looked and couldn't see much ( a lot of wiring, tubes and stuff in the way.

 

 

oh wow, thanks a million! I've heard that there are a series of letters? Abba or something like that, is this true? I saw on yours only an A, so all the pistons are A?

 

yeah there will be 4 letters, you just can't see the others in the picture. It can be any combination of A and B. Mine happened to be AAAA. The stamp might be dirty, I just wiped it off with my finger.

 

Hey, mods!!
This is a great topic to be mentioned in the Essential Links!

 

Does it make a difference which pistons you have...?

 

It does if you're swapping them.

 

mine are abab

 

I think mine were either all A's or B's. I'll have to check on my H22 block and H23 block and see.

 

what's the whole reasoning behind having a series of different pistons(abba)? I mean wouldn't it make more sense to have one engine have all A and another engine have all B instead. The difference in each piston is so minuscule...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Matgallis &raquo;</TD></TR><TR><TD CLASS="quote">what's the whole reasoning behind having a series of different pistons(abba)? I mean wouldn't it make more sense to have one engine have all A and another engine have all B instead. The difference in each piston is so minuscule...</TD></TR></TABLE>

so you can be like these guys

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Shakes &raquo;</TD></TR><TR><TD CLASS="quote">so you can be like these guys

</TD></TR></TABLE>

that is so retarded yet SO FUNNY!

the differences in the piston sizes are to accomidate for differences in the block casting.

 

hehe Funny Stuff, Goood info to on these markings. Is that the only reason they have diff pistons? to make up for variables in the casting?

 

Honda has always been a stickler for running very exact clearances, so the different size pistons are to make up for the tolerances in the machining and casting processes....much the same way there's like 5 different bearing sizes in OEM Honda bearings.

 

What if you're putting h22a1 pistons in an h23?
Does the same thing apply?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SKDRCR &raquo;</TD></TR><TR><TD CLASS="quote">What if you're putting h22a1 pistons in an h23?
Does the same thing apply?</TD></TR></TABLE>

I would say yes. The blocks are identical and the piston bore is the same, so the procedure for determining piston sizes should be the same as well.

 

rehost pics pleasE?