How do you tell what head you have?

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Old Mar 29, 2003 | 08:16 PM
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From: Commonwealth my ass This is the communist state, VA, USA
Default How do you tell what head you have?

I just bought an 89 D16A6 (Pm6), While dismantling it to clean the block up and such, I noticed the cam gear was a Pm3 (D15b7?). Now I'm pissed and afraid that the whole head may well be Pm3. So I was wondering how I could tell? Is there a stamp some where? It's always something! Thanks in advance...
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Old Mar 29, 2003 | 09:00 PM
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Default Re: How do you tell what head you have? (h8tred)

I thought those heads where very similar...
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Old Mar 29, 2003 | 09:11 PM
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From: Commonwealth my ass This is the communist state, VA, USA
Default Re: How do you tell what head you have? (SEA Hag)

The head its self is from what I have read, But damn it I bought an si engine to have an si engine, Not a si block with 92-95 cx Head guts... Is there a stamp on the cam? That and springs is what I'm worried about. I mean, Who would put a Pm3 cam gear on a si? I think I'm going to have to kill someone, I don't have money for this ****...
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Old Mar 29, 2003 | 10:41 PM
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Default Re: How do you tell what head you have? (h8tred)

if its a Si head..
look iun the front of the head... close to the exhaust ports. there shgould be a circle with PM6 on it, and other numbers....
basically all engine main parts have their ecu stamped somewhere... for ex., my head and block have the P28 stamped around.... my old STD ha sPM9 in the head.. just go and look at it
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Old Mar 29, 2003 | 10:59 PM
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Default Re: How do you tell what head you have? (USDM 4G VTEC)

Well its simple... D15B7 means... 1.5 LITRE... B7 is the head code
D16A6 means... 1.6 LITRE... and A6 is the head
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Old Mar 30, 2003 | 08:57 AM
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From: Commonwealth my ass This is the communist state, VA, USA
Default Re: How do you tell what head you have? (SOHC NoTEC)

lol, I know that NoTec... I'm not new to the engine codes. I just don't know how to tell what cam I have. I drove 455 miles round trip to pick up this engine, If I find out it has a cx cam in it, You best believe the guy is going to hear from me. I mean for what I paid, I didn't get ripped off (unless he lied about the condition of the block too), It would have been nice of him to say it was a si block with a cx head. It would have saved us both a lot of time and stress...
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Old Mar 30, 2003 | 09:04 AM
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Default Re: How do you tell what head you have? (h8tred)

dont quote me on this but i think some of them are stamped pm3.even though its an si.i will check mine tonight
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Old Mar 30, 2003 | 09:05 AM
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From: Commonwealth my ass This is the communist state, VA, USA
Default Re: How do you tell what head you have? (h8tred)

Well, I just looked and the head is pm3... If it looks like ****, Smells like ****, And tastes like ****, It's ****. I'll just assume it has the cx cam and valves also. Thanks for the replys. I'll keep you posted on what the guy says and does to fix the problem.
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Old Mar 30, 2003 | 09:09 AM
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From: Commonwealth my ass This is the communist state, VA, USA
Default Re: How do you tell what head you have? (civbeater90)

dont quote me on this but i think some of them are stamped pm3.even though its an si.i will check mine tonight
Yeah, Let me know... I already e-mailed the guy, And I would really hate to kill his family for nothing...
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Old Mar 30, 2003 | 09:17 AM
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Default Re: How do you tell what head you have? (h8tred)

um...a cx head has 8 valves...how would an 8 valve cam move 16 valves...
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Old Mar 30, 2003 | 10:09 AM
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Default Re: How do you tell what head you have? (crxgator)

You sure the 92-95 Civic cx (d15b7) has 8 valves... The guy was real nice about it, He said the engine was pulled unaltered from his fathers 1989 crx si, And that he wasn't out to rip anyone off. So I guess it must be an si head. It says Pm3b on the cam gear, Not just Pm3 If that makes any difference. I guess it's stress, I have one car, It blew up. After buying the engine I have $111.00 to get it in and running, And I still need a si wiring harness (~$100), Si distributor ($195 new on ebay), An si ecu ($60-80), And a injector resistor box ($30-50). Maybe even new injectors... The intake valves have surface rust on them, Can I just clean that up or should I get new valves all the way around? Damn money is so evil.
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Old Mar 30, 2003 | 10:12 AM
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Default Re: How do you tell what head you have? (h8tred)

my 90 si cam gear says pm3 also.
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Old Mar 30, 2003 | 10:57 AM
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Default Re: How do you tell what head you have? (h8tred)

i can kinda help you out with some parts...i have a pm6 ecu, and a si dist, that needs a new ignitor which you can use from your dx dist (broke one of the 4 clips off of it by mistake)- dist. $25 shipped, ecu $40 shipped...
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Old Mar 30, 2003 | 11:07 AM
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From: Commonwealth my ass This is the communist state, VA, USA
Default Re: How do you tell what head you have? (crxgator)

i can kinda help you out with some parts...i have a pm6 ecu, and a si dist, that needs a new ignitor which you can use from your dx dist (broke one of the 4 clips off of it by mistake)- dist. $25 shipped, ecu $40 shipped...
Word! Hit me up at Paranoidlust@aol.com, We'll discuss payment and such...
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Old Mar 30, 2003 | 11:33 AM
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From: the asshole of america..., upstate new york, USA
Default Re: How do you tell what head you have? (h8tred)

as far as i know the d16a6 head is a pm3. my stock cam gear says pm3b on it too. both a6 heads that i have say pm3 on them. one is a pm3-8 and one is a pm3-9.

pm6 is the ecu code...not the head code!

look at the circle between 3-4 exhaust ports...pm3-? = d16a6 head.

i like it better when search works.


[Modified by fastcrxsi90, 3:34 PM 3/30/2003]
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Old Mar 30, 2003 | 11:44 AM
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From: Commonwealth my ass This is the communist state, VA, USA
Default Re: How do you tell what head you have? (fastcrxsi90)

pm6 is the ecu code...not the head code!
If that is the case, Why does the intake mani and throttle body say pm6?

i like it better when search works.
I hear you there, What the hell is wrong with the archived search anyway?
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Old Mar 30, 2003 | 11:49 AM
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Default Re: How do you tell what head you have? (h8tred)

I just want to take the time to thank everyone for responding, I do have an Si head. Thanks everyone. Crxgator, You kick ***, Good looking out.
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Old Mar 30, 2003 | 11:55 AM
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From: the asshole of america..., upstate new york, USA
Default Re: How do you tell what head you have? (h8tred)

pm6 is like a parts code...if you buy any parts from honda, they all have pm6 in the part number. why...i dont know.
my intake manifold says
pm-6
hf-3
on the back....but its definately not from an hf...nor a dx.

just look at the head...does it say pm3 on the head itself??? F*&k the camgear...thats just a part number...if you want to know the head code look at the head. not the camgear, intake manifold, and TB. if it says pm3-_ you have a d16a6 head. the year is in the circle after that. hope that clears things up.
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Old Mar 31, 2003 | 02:27 PM
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Default Re: How do you tell what head you have? (fastcrxsi90)

CX=d15b8 sohc 8 valve

DX=d15b7 sohc 16 valve 1.5l 102hp
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