I am doing 2 hybrid motors F22b1 block/H23a1 head and an F23a block/H22a head. And am wanting to upgrade the rod bolts, main studs and head studs if possible. So what I need to know is Are the F22 and F23 rod bolts the same as an H22 (9mm). Same with the main studs, are they all the same size?

 

Well after further research I discovered that:

The F22a1 F22b2 H23a1 and H22a1 all share the same Rod bolts and Main studs.

The F23a4 has the same main studs as the F22a1 F22b2 H23a1 and H22a1
but the Rod bolts are the same as the K20a3 (Thank you Pirate)

And the F23a4 F22a1 F22b2 and H23a1 all share the same head studs.

With that said and the previous knowledge that the GSR shares a similar rod bolt with H22a I now can order ARP bolts and studs for my hybrid builds.
Thanks everyone for there help.


Modified by MadCityLude at 8:09 PM 8/31/2006

 

You need to research better.

The GSR and Preludes do NOT share the same rod bolts. Whoever told you that is ignorant. They are however similar. And for the record ANY F23 rod bolt is dissimilar to any other B, F or H-series rod bolt (i.e. NOT the same). The F23 does share the rod bolts with the K20A3 engine though.

Get your facts straight. Don't just trust other know-it-alls on the InTrO-NeT. Going to SLhondaparts.com and acuraoemparts.com and researching the actual part numbers will help you get your facts straight.

Pirate

 

Thank you Pirate, I did make one mistake with the F23 rod bolt it did have a differerent part number. Will edit above.


Actually I did the research all myself and checked part numbers. The only fact I did not look up myself was the GSR info. It very well could be wrong. I couldn't find an acura site to get part numbers from. I used the info from here
https://honda-tech.com/zerothread?id=1735395


All the part numbers I pulled from http://www.hondaautomotivepart...h.jsp

 

wierd so the K20A3 is the same as the H22A? Well my first look into the GSR ARP rod bolt size was the GSR ARP rod bolt was actually longer by an 1/8". I will post up my results when the machinist gives me the bad news according to above...

 

Thanks for the help.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ExplicitSpeed360 &raquo;</TD></TR><TR><TD CLASS="quote">wierd so the K20A3 is the same as the H22A?</TD></TR></TABLE>

Damn man, read.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PirateMcFred &raquo;</TD></TR><TR><TD CLASS="quote">for the record [the] F23 rod bolt is dissimilar to any other B, F or H-series rod bolt (i.e. NOT the same). The F23 does share the rod bolts with the K20A3 engine</TD></TR></TABLE>

that means:

F23 equals K20A3
F23 NOT equal to F22/H22/H23/B16/B17/B18

The F23 is a rod BOLT no nuts
The others are rod STUDS with NUTS

This is an F23 rod bolt/rod/piston:


Pirate

 

Thanks pirate for assisting with the info. Much appreciated.

 

Well the words from my machinist is the GSR ARP rod bolts 9mm will work on the H22A rods he took one out tried it and said he will have the set for me tom. morning...

 

well picture explains it all...GSR 9mm ARP rod bolts work on the H22A rods...on the left is my beefer JDM H22A rods with the GSR 9mm ARP bolts. On the right is my old JDM H22A rods but smaller less beefer rod. The one on the right (beefer arp bolts) is going into my rebuild so should be good with a lil Nitrous maybe...

The GSR rod bolt is a lil longer then the H22A rod bolts but I dont think the clearances are that close even if they are die grinder will fix that...

 

I assembled the engine today and the GSR 9mm ARP rod bolts worked just fine on the H22A rods no clearance issues in the block everything rotated good...

 

great thread, this should be in the FAQ. I like engine specs, and what is similar,

interesting to see that the gsr rod bolts work but are 1mm longer

 

i have h23 rods with gsr rod bolts. what did everyone torque the rod bolts too?

 

are you supposed to just knock them out with a hammer when you change them ? I would think with such a precision piece that wouldnt be the case. And then install its not like wheel studs where u can just impact them in.

 

what about f22b1???