1. What is the code on the pistons, so you know they are real Type-S pistons?
2. What all needs to be done in order to install these into an H22a1 Block?
3. Can I just use aftermarket rods with the stock Type-S pistons?

Any info will be greatly appreciated.

 

you will need to have the cylinders honed. the type s pistons are taller than the non s pistons so they will stick out of the block

hmotorsonline sells type s pistons

 

1. Type-S pistons should have the mark P5P. There will be a stamp on the side in the wrist-pin area and also on the top of the piston.

2. Hone is recommended but not absolutely needed. What's more important is that you have the cylinders measured for roundness and taper. Honing will in most cases put the piston-wall clearance out of spec. If any cylinder machining is required, overbore .25mm and use the OS pistons.

If your cylinders are in spec, you must look on the block to find out how many A and B pistons you need depending on each cylinders. There are marks on the block.

3. You can use either 5th gen oem rod or aftermarket. The pistons require a rod that supports the floating wrist pin design.

If you don't already have one, you do need the service manual. Can be dl'd for free from http://www.spoonhonda.com/Free_Downl...uals_s/119.htm

 

wait so your saying that you cant use the stock h22a rods with type s pistons cause i was going to do this. please explain

 

92-96 rods and pistons are press-fit type, 97-01 are floating-pin . You can have your H22a rods rebushed to accept the Type-S pistons.

 

So can't I just use the 97-01 rods in my 92-96? They have different bearing clearances don't they?

 

same rod journal clearances, different SE wrist pin design.

 

Go through the service manual. The questions you're asking can be answered with a little reading.

 

Which service manual? There are like 10 of them.

 

Cmon, this isn't so difficult. If you can't figure out which manuals to look at depending on the parts, this probably isn't something you should be doing yourself. Sorry to be blunt, but it's the truth.

 

www.helminc.com

buy the hard copy.

 

Well, he needs the 4th and 5th gen helms if he's going to use Type-S pistons in his H22a.

 

ok is it hard to do cause i have a press at my job the nice big snap on ones. and the the part number would be in the helminc?

 

Type-S (and all 97-01) pistons do not use press-fit pins.

 

Anyone know where to find pics of the rod differences.

 

bump for more info

 

ok i looked at the manual and it doesn't tell me what the damn bearing is. i am trying to find it so i can rebush it someone help me out, so i can get my rods and pistons together...FYI its 92-96 rods with type-s pistons.

 

Go to a machine shop, they'll know what to do. Take the pin clearance spec with you.

 

so your talking about the 21.961-21.965 or the .005-.015 clearance. which one?

 

.005-.015mm.

 

just quick question can u run type-s pistons on an h23 block i know h22 is frm but h23 is steel so can you use them or not

 

H23 is frm.

 

I thought you had to atleast hone out the cylinders if you were going to swap the pistons? So if its round and unscared you can just "drop in" new pistons and rings? Arnt the valve reliefs different on the Type-S pistons that regular ones?

 

H23 with Type-S Pistons= 13.16:1 Compression
H23 with 10.6 H22 Pistons= 12.61:1 Compression
H23 with 10:1 H22 Pistons= 11.79:1 Compression

If you use the Type-S pistons in an H23 would need to redo the connecting rods for floating wrist pins.
Any H22A1 or JDM 10.6 H22A piston can just be pressed onto the H23 rods.