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So I just bought a 1996 Honda Civic 4 door, 5 speed. The engine code is a D15B8 and the head stamped PM8-2. Now from what I see the motor was in the civic until 95. Is this correct? Has my engine been swapped? or is this a stock motor for that year. Sorry in advanced, all of the Honda engine and head combinations out there get so confusing.

 
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Yes as I read/searched for you here it is.
D15B8

Found in:
1992–1995 Honda Civic CX (U.S. model)
Displacement*: 1,493*cc (91.1*cu*in)
Bore and Stroke*: 75*mm ×*84.5*mm (3.0*in ×*3.33*in)
Compression*: 9.1:1
Power*: 70*hp (52.2*kW, 71.0 PS) at 4,500*rpm
Torque*: 83*lb·ft (11.5*kg/m, 113 Nm) at 2,800*rpm
Limit*: 5,800*rpm
Valvetrain*: SOHC eight-valve (two valves per cylinder)
Fuel Control*: OBD-1 MPFI

 
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Really!?!?! I'm new to the forum and out of all the civic forums out there I picked this one. Registered, searched, then asked a question and I seriously get attitude over a question. Yes I searched and found that same info, Yes I searched the web and found that same info. But I'v also been around long enough to know that there are manufacturing anomalies out there, especially being that 1996 is year 1 for the 6th gen. Sometimes manufacturers use mixed matched parts on these cross over years. So I thought perhaps I would go online, join a forum, and ask the civic "experts" to see if there was something out of the ordinary for these years. Now I'm not judging this forum based on 1 persons post, but seriously?

 
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Damn, dude.
WTH were you expecting?
You already had your own answer, someone else confirmed the same, and you are griping about it?



you demand help and specialized expertise from strangers on a free internet board while simultaneously insulting them?
For your reading pleasure: https://forums.craigslist.org/?act=Q&ID=171419738




Car is 96, OBD2.
Engine is 92-95, OBD1.
Swapped IMO.
IDK anything about the numbers on the head casting.
Do you need to pass an emissions test or something?

 
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Wow. Im a huge forum person. I use them for everything and I contribute where I can. They allow people to come together in a sort of online "community". At least every forum I have been part of has been that way until now. Why the F*** be part of a forum if your just going to insult others trying to get help. What is the point of that? And how did I Demand help? I asked for it after doing searches of my own. Also pretty sure I never insulted the wealth of knowledge on this forum. In fact I specifically stated that I didn't blame this forum for 1 persons post. I never complained about someone getting me the same info I already knew, the reply was basically calling me lazy, and that I asked others to do the work for me which was far from the case. I only wanted others to chime in to confirm what I already knew or to set me straight on the proper facts.

I don't need to pass emissions, just got the car for cheap because of a dead cylinder and just trying to find out some more information on the motor and head to get it fixed and possibly learn something for future reference.

 
Rep Power: 518

You may want to check the part # on the ECM, see if it was part of the swap too.

You now know what the block came from and you can order parts for it if you had to.
I guess you'd need to visually compare a head to see if it is correct for the engine, but I'd expect it is original to that engine. I wouldn't expect a head swap on this, but you never know.


If I read this correctly in the parts catalog, it looks like the head for the CX had the spark plug tubes angled toward the rear, the other choice has the tubes angled to the front.
Says "16 VALVE" instead of VTEC on the valve cover.

 
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Are there any visual differences between an OBD1 and OBD2 ecu? Also I popped the head off today and it is only a 8 valve head, but the pistons had the 4 indentations that you would see on a 16 valve motor. Is this normal?

 
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How was that attitude? All I did was just posted what you wanted to know. Judge a forum for 1 person and that is just being ignorant.

 
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Post the part number on the ECM and I might be able to tell more.

So far, all the parts pics I see of 92-95 CX show 16 valve.

http://www.hondaautomotiveparts.com/...ER+ARM+%281%29

Unless I'm looking at something wrong. I'm NOT a parts person.

I can't confirm what wiki says about it being an 8 valve head as stated through the parts catalog, but apparently it is supposed to be 8 valve.

Yes on the 16v pistons:
https://sites.google.com/site/24teng...h-16valve-head

 
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To check ecu you need the 6-8 code for 6th gen low end(economy cars. Excluding EX and Si) the ecu is a P2E.
Would Be
XXXXX-P2E-XXX
XXX-XXXXXX.
And for the the D15b8 is the P05. Just got to get those 3 digits to tell what ecu it is.

 
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The code on the ecu is 37820-P2E-L01 and the date on the side is march 1996 which is also the manufacture date of the car. So can an OBD1 engine run on an OBD2 ecu?

Iv ordered parts for the motor and disassembled the head and its now off at the machine shop.

 
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Yes it can but you are limited to the engine since the P2E. Not sure how or what it does since all ecu's are different with endless limitations. From what I heard the b8 civics where 8 valve, 2 per cylinder from different threads and Honda dealer mechanic.

 
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Let me know if this is right. An OBD1 engine will run on an OBD2 ECU if the injectors, alternator, o2 sensor and so on are OBD2. Making an OBD1 engine now an OBD2 engine... sort of.

So my thoughts, being that the injectors are not the injectors for a D15B8. The stock B8 injectors are smaller being that it is a 8 valve head. So the injectors that are on the motor now are larger than they are supposed to be which would cause it to run rich?? or would it really not matter since its the same cubic inch motor. Just trying to think this out because when I pulled the head I could tell it had recently been off so don't want to run the motor if something is causing it to burn valves. My other thought was that the head was taken off to fix a burnt valve but instead of having the valve seat ground they just threw in another valve and it of corse burned again. Sorry just thinking out loud and for some others thoughts.

 
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After following all the superceded numbers, looks like it is for a 96-97 DX/CX/LX Civic w/manual trans.

You sure of what your car is? Have you checked the VIN?



None of those matter, they can be the same for OBD1 and 2.
You can make an OBD1 engine work in an OBD2 car, and vise versa.
It all depends on what the computer needs to see to make the engine run.

OBD2 adds a second O2 sensor to monitor the cat.
OBD2 uses monitors and controls on the gas tank to make sure it stays sealed properly (evaporative emissions).
There is more, but even those above are unimportant if nobody cares about the CEL staying on.





You don't know and you can't tell without good scan data.

Tight valves burn.

Volume-wise, the injector flows are chosen based on engine displacement and max RPM. Spray patterns might be different between 8 and 16 valves though.