Wafler

Here's the deal... I have two heads that match my B16A... One is mounted on the engine and the code says PR3-1. My car being an EDM Civic EG6 means it should have the B16A2, which in EDM terms means 160bhp. The older B16A1 however has 150bhp.
- <U>My problem is as follows:</U> I have B16A1 stamped on my block but everything else tells me that at least the head is from an A2(grey connectors, no PGM-FI label on the IM and so on). On this particular head, it says " PR3-1 "... IS THIS AN 'A2' OR AN 'A1' head?
- I have another head which came with the car but as said before, this one is not mounted on any engine. On that head it says " PR3-3 "... ?!?

What is the difference? Are both heads A2's? (and what's the deal with Integras having PR3-1's?)

Please help, I'm about to go crazy not knowing what I have and what to do...

B_CRUZ!

lol... thats the casing number for all b16a and type-r heads.

Wafler

Ok, there's no difference other than the numbers?

How the hell do I tell A1 and A2 heads apart then? (disregarding valve covers, one of the heads has none...)

And, which is better (if any) of PR3-1 / PR3-3 ?

Kevedge

I have the same problem right now, cant figure out if I have a first gen or second gen b16!

92civeg

i believe the rocker arm assembly for a first gen is casted while a second gen is billet,(thats what i heard, anyone else hear this?)

dualknuttz1

The year of the head should be stamped on the block. It is two digits with a circle design around it. 88-91's are 1G and 92+ are 2g. Hope that helps. I know there is a post somewhere with a pic.

dantastic

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92civeg &raquo;</TD></TR><TR><TD CLASS="quote">i believe the rocker arm assembly for a first gen is casted while a second gen is billet,(thats what i heard, anyone else hear this?)</TD></TR></TABLE>

i heard that the top of the oilquirter bars (visible from the oil cap) are rough cast on sir-1 motors, machined/billet on sir-2's.

http://tech.hybridgarage.com/tech/b16/index.html

Wafler

If anyone has pictures og A1's and A2's (without the valvecover...), it'd be great

92civeg

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dantastic &raquo;</TD></TR><TR><TD CLASS="quote">

i heard that the top of the oilquirter bars (visible from the oil cap) are rough cast on sir-1 motors, machined/billet on sir-2's.

http://tech.hybridgarage.com/tech/b16/index.html</TD></TR></TABLE>


yeah thats what it was, my mistake

Wafler

Does anyone have a picture of a 1st gen head, with the cast aluminium oil spray bars(without the valve cover...) and maybe another of the 2nd gen extrude aluminium ones?

SICKSOLSI

if they are both jdm heads dont go by the years on the head because some 91s are second gen too...its kinda tricky

cant you tell by the plugs on the dizzy??

92civeg

just open your oil cap, if the oil squirter bars look and feel smooth its a 2nd gen, if there kinda rough its a 1st gen

Filliam H. Muffman

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wafler &raquo;</TD></TR><TR><TD CLASS="quote">Here's the deal... I have two heads that match my B16A... One is mounted on the engine and the code says PR3-1. My car being an EDM Civic EG6 means it should have the B16A2, which in EDM terms means 160bhp. The older B16A1 however has 150bhp.
- <U>My problem is as follows:</U> I have B16A1 stamped on my block but everything else tells me that at least the head is from an A2(grey connectors, no PGM-FI label on the IM and so on). On this particular head, it says " PR3-1 "... IS THIS AN 'A2' OR AN 'A1' head?
- I have another head which came with the car but as said before, this one is not mounted on any engine. On that head it says " PR3-3 "... ?!?

What is the difference? Are both heads A2's? (and what's the deal with Integras having PR3-1's?)

Please help, I'm about to go crazy not knowing what I have and what to do...</TD></TR></TABLE>

first off, it shouldnt have the b16a2, it should have the second gen b16a1 and the type-R heads are stamped PR3-02, while a normal b16 head is just PR3.

you have a b16a1 head. take off your exhaust manifold and look at the sticker on your head. if it says 9|2 its a 92 head, if it says 9|8 , its a 98 head. i think the engine should be a year older than the car. but im not sure

Wafler

First, the EDM Civic EG6 never had the A1 in my opinion... Anyway, the specs for my particular car says B16A2 - however, I suspect it has been badly crashed once and then had a B16A1 block (which is psysically equal to the A2 block) installed instead, possibly being mated with the A2 head from the previous engine...

But disregarding that, none of my two heads has only PR3 stamped on them (well, it says PR3 on the campulleys) but the stamps on the heads themselves say either PR3-1 or PR3-3.....

Btw, 92 (9|2) means A1 while 98 (9|8) means A2 ?

I'll take some pictures for you to see.

Wafler

A1 head, 99% sure...

Will be building up my other head, the one with PR3-3 stamped on it and smooth machined oil spray bars. Just need new cams, mine are crappy... ITR cams, yes ;P