As the topic says, I need to know what/how to tell a PR3-4 itr head, from a PR3-4 00' b16a head. Any and all pics would be great. One way i've heard how to tell is if you flip the head over and look at the chamber. I guess for itr's, along where the valves meet the head, it should be flush (dont know if that makes any sense). I've seen pics from ff.sqaud and they point that out exactly, but on there site it says B18C/B18C1, so I wasn't sure if that meant usdm itr's as well. I guess what im asking is, did 2000 b16a heads come stamped PR3-4 as well as itr's, and whats a deffinate way to tell them apart?. Also the yr. on the head is marked 1 yr from release date of the car, correct? if this is true, the 99 civic si's head should read 9/8, the 00's should be 9/9, as there was no further b-series si released. Thanks in advance for any/all help

 

Have you tried a search?

This has been covered many times before.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pondus &raquo;</TD></TR><TR><TD CLASS="quote">Have you tried a search?

This has been covered many times before.</TD></TR></TABLE>

I tryed search, only came up with 4 things, 1 or maybe 2 of which had pics, that didnt cover what im asking.

 

My ITR head says 9|7, but it's a 96 spec. Can't be a 98 spec. I think my casting number is PR3-3. I could be wrong.

 

look for greenish paint by the distributor side

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Slain &raquo;</TD></TR><TR><TD CLASS="quote">look for greenish paint by the distributor side</TD></TR></TABLE>


Alot of ITR people can comment on that, saying that its REALLY faint to see it on their heads and even sometimes it completly gone.

 

that is true...mine was a bit faded as well

you could always pop off the valve cover and take a look around.

 

del Sol VTEC also came with B16 DOHC VTEC engine...

the ITR head (while the same casting as the B16) should have obvious signs of porting (handwork) that was done at the factory. That's the basic difference between the B16 and B18C5 head to my knowledge. The B18C1 (GSR) head is completely different... the intake mani bolt pattern is not the same as ITR.

 

the green paint is easy to remove, i should have said i didnt need info on that in the post. any way to tell besides the more common, cams/green paint/valves..?Between the vtec silonoid and the dist. on the head it says 30(on the exhst. side)and 4 on the intake side.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 97ITR239 &raquo;</TD></TR><TR><TD CLASS="quote">del Sol VTEC also came with B16 DOHC VTEC engine...

the ITR head (while the same casting as the B16) should have obvious signs of porting (handwork) that was done at the factory. That's the basic difference between the B16 and B18C5 head to my knowledge. The B18C1 (GSR) head is completely different... the intake mani bolt pattern is not the same as ITR.</TD></TR></TABLE>

97 or 98 in japan they stopped hand p&p the heads

i dont know what your going to be able to tell from just popping off the valve cover?

 

itr heads that are usdm say p73 on the front part

 

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kidkombo &raquo;</TD></TR><TR><TD CLASS="quote">itr heads that are usdm say p73 on the front part</TD></TR></TABLE>


Can you varify that with pictures, i have never seen that.

 

Here's a pic of my 96 spec head.

 

PR3-3...ive seen that on a 00-01 usdm itr head as well

 

I purchased an ITR head from Japan. I believe it was a '96 Spec, as the casting date was in 1995. The head is stamped PR3-2. I too thought that I may have been duped, but upon inspection I found necked intake valves and porting at the valve seats. I had originally thought that the entire port would have been cleaned up, but only the seat area is.

Sorry, no pictures.

 

thanks

 

i'll look at my itr head later when i get home..see what i come up with

 

I believe those head casting stamps can be found on b16's, b18c1's and b18c5/r's. IMO, the only way to *confirm* whether it's a ITR head is by popping the valve cover and looking at the springs, as well as signs of port matching, etc..

 

uh p

 

- green marking
- dual valve springs on exhaust side, purple for intake and yellow for exhaust (i think)
- look into the intake port it WILL have mild porting in which looks different then the normal head.

-96 or new head
-some say pr3-3 or pr3-4

ill try to think of anything else for you

i know this is a crappppyyy pic but its the only one i found on my comp... ok now on to the pic if you look towards the back of the ports u will see how there a different shade thats where the mild porting will be....

 

There are some pics in this thread:
https://honda-tech.com/zerothread?id=1044901

You can see that the porting on the intake side is only near the valve seat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22dude &raquo;</TD></TR><TR><TD CLASS="quote">- green marking
- dual valve springs on exhaust side, purple for intake and yellow for exhaust (i think)
</TD></TR></TABLE>
they are actually yellow on the intake and blue on the exhaust

 

any clue what valve springs have green on top?