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Old 31 Oct 2007, 10:15 am
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Default Changing engine- D16Y8 to D15B (JDM) Questions. .?

I have a 1997 honda civic EX which needs a new engine. I was planning on selling my car then this happened(i have twins and need a bigger car) Now i want to replace the engine then sell it. It has became impossible to find a D16Y8 that isnt $$(engine currently in car) but most places I call have told me that the D15B w/vtec will work the same, however, most shops I call are not so sure. The car currently has a P2P ECU and a OBD2, will the D15B work with both of those? Most the shops just think my main problem will be its a 1.5 and a 1.6 is currently in it. I have tried to find the infor i need but cant seem to find it at all. I want to make sure if i put the D15B in the car it will work without any problems. I just want to know that the ECU will work with the D15B and that the 1.5 vs 1.6 wont be an issue.. Any one have any light to shed on this? thanks! I want to fix it the best way possible but also the cheapest so when i sell it I can actually get some money to put for a new carI do believe that the D15B has a OBD2, i was looking and there is one that has the OBD1 and one that has the OBD2.. and i believe it has it but cant be 100% sure https://www.torontojdm.com/lite/cart...7e0c724b4Also, I dont know where you have seen the D16Y8 for $400 but i must be looking in the wrong place.. Ebay doesnt have any, and all place i call dont have them or they want $1300 for them.. I want to spend no more than $700 on a replacement engine, the D15B i found for $600.. Other than the D16Y8, what are other options.. and what do i have to worry about with those?
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Old 31 Oct 2007, 10:15 am
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Well you need to keep it OBD2. If not you HAVE to change the tranny, motor mounts, axles, ECU, complete wiring harness and you WILL have problems. Why cant you find a D16Y8? They are readilly available for about $400-$600 in very good shape with low miles. If you try to use the ECU from the car now it will not run correctly as it will be looking for sensors that aren't there or are pinned differently in the harness. They make a OBD2 to OBD1 conversion harness but it runs about $120 just by itself and would be required to do the swap. The ECU you need is about $100, the axles, tranny, and wiring would be about $500, then you would have to get motor/tranny mounts custom made because this is just not a swap that people do. You could basically get a B16 swap put in your car from a 99-00 Civic SI that has almost twice the power for the same price. Try looking on Ebay for the D16Y8, you can go and get one and that way all you are replacing is the engine, and not the tranny or anything else.
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Old 31 Oct 2007, 10:15 am
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Just copy and paste this item number on the www.Ebaymotors.com website: 290166567179 where in says search. Its for a D15b Vtec motor OBD2 and won't have to worry about putting in an older motor and deal with getting a computer to.
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Old 31 Oct 2007, 10:18 am
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I would go ahead and throw a b16 or b18 in there and someone would diffilently get it off your hands!
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Old 31 Oct 2007, 10:21 am
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The D15B is 1.5L 125HP motor SOHC Vtec OBD-1, well if you want to get every last penny I would look for another D16Y8 or rebuild yours. To convert it to OBD-2, you need a Y8 Dizzy and injectors to be place on the D15B. and poss you o2 sensor. Check hmotorsonline.com great place for motors
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Old 31 Oct 2007, 10:24 am
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I have a 00 Civic EX, I just recently went to an engine shop for the swap. I chose the d16y8, but the shop mistakenly put in the JDM d15b Vtec. I dont know whether they did it on purpose or by mistake. Either way Im getting the D16y8 back in it for $795 plus labor and parts. I think they quoted me the wrong price so I think I got it for a real deal because of their mistake. Anyways, you will have a problems with the throttle position sensor, Idle control valve, and the car may surge up and down between 1500-2000RPM at idle. My car is doing that now and hopefully putting back the D16y8 will fix that. If you dont change the ECU, you are likely to get a CEL and have to change out some sensors. JDM d15b is a P08 OBD1, D16y8 is a P2P OBD2.
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Old 31 Oct 2007, 10:27 am
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You'e all retarted. The d15b vtec is by far a better Motor than the d16y8. the only thing the y8 has is a better intake manifold. You wouldnt have a problem putting in a 1.5 vs a 1.6. there is no difference in outward engine size. The difference will lie inside the motor, which is a moot point. As for obd2 that is your problem, you would have to retrofit the motor to accept the obd2 stuff. it can be done, and the motor in my opinion is a better one that was offered in your vehicle stock. I personally would go with the obd1 P08 ecu for that motor, you can get one cheap now, around 65 dollars and far with a far better power curve that your stock ecu.. my whole d15b swap cost me 500. and runs a 15.1 quarter in a 91 crx.
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Old 31 Oct 2007, 10:30 am
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well first off dont even listen to hondab16 or whatever his name is. you dont have to change motor mounts axels. whatever else he said about motor tranny axels. all d series motors trans within the years we are talking about bolt up to each other. second you have a obd2a car. honda made obd2a and obd2b. now with your d15b motor you found see if they have an ecu with it. your ecu in your car now will run the engine if its the same obd ie all you need is obd2a dizzy for the d15b. your d16y8 dizzy will more than likely bolt on to the d15b and you can just use that and be golden. just like you can use a b16 vtech dizzy on a b18 vtech of the same obd, n vice versa worst case for u it just might not run the smoothest depending if you get the d15b ecu or not because of the displacment changes, but i serously doubt you would notice anything becuse it would just run a lil bit leaner or lil bit richer. since your car is an ex,the wiring harness will run the any d series obd2a motor. if the manifolds are different, you may need to extend your act temp sensor plug. easy as that just find out what your buying. and also if you get the obd1 b15b and obd1ecu all you have to do is buy the obd2a to obd1 ecu wiring harness conversion and the obd2a to obd1 dizzy wiring conversion.and obd2 to obd1 injector harness plugs. all conversion pieces can be found on honda-tech.com under marketplace. hope the best for you
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Old 28 Jul 2008, 03:49 pm
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Default Re: Changing engine- D16Y8 to D15B (JDM) Questions. .?

I know this was posted a long time ago but im actualy going through this swap now and i got the d15b motor in my 99 civic ex and everything is connected but it wount start up and idk why i am so stumped cause we thought it was the fuel pump relay but its not that we had a few times were it kinda started but couldnt keep the power going,now when they sent the motor i had to swap the intake manifold from my d16y8 onto the d15b motor and the wiring harness they sent with it was cut off and idk y they did that....so we used the d16y8 harness for it..so basicaly im saying if anyone knows what the problem could be or how to get it running please let me know cause i am just stumped
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Old 30 Jul 2008, 12:40 pm
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Default Re: Changing engine- D16Y8 to D15B (JDM) Questions. .?

I just did the exact D16Y8 to D15B engine swap on my 98 civic Si Vtec SOHC as you just last this week lol, and I had the same problem it would not start so I unplugged one of the spark plug wires and grounded the side on the engine and tried to start the car but no spark so I knew that it wasn't getting any fire to ignite the engine. What I had to do is use my old distrubutor rotor (it looks like a 1.5" cap) then my engine started up. You should make sure to check your crankshaft sensor and everything that is related to the distributor if you dont' get a spark when starting up ur engine. I'm actually not the one who did the work just was there helping my uncle put in the engine for me so I don't know if I called everything by the proper name.

Now I have a problem with my car not Idling properly. I basically only used my old D16YB intake manifold and the distributor rotor and also the spark plug wires everything else I'm using the japanese D15B I got from Tigerjapanese.com. Does anybody know if I need to swap out any sensor for the throttle or know why my car keeps on rev'ing up and down when trying to idle and then sometimes my engine light comes on after and i have to unplug the battery to make it go away. Any help would be appreciated.
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