d16y8 engine with hx harness?
#1
Honda-Tech Member
Thread Starter
Join Date: Jul 2006
Location: papillion, NE, USA
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
d16y8 engine with hx harness?
Alright i have a 2000 civic hx with the stock d16y5. Motor is making some noise and has 230,000 miles so its time for a replacement. Im wanting to just do a y8 swap but im trying to get everything needed before we tear into it.
The hx is vtec but it is vtec-e and it has has a few different things then the ex and the other models have. Hx has a egr system and ive heard it has a 5 sire 02 sensor rather then the normal 4 wire.
So my question is will i be able to use my stock hx wiring harness or will i need to get a harness from a 99-00 ex?
Ive tryed to search this and ive read like 6 different things. Im looking for some legit answers here.
I know with the motor i will need a 99-00 ex computer, just trying to see if i need the harness aswell.
Thanks in advance.
The hx is vtec but it is vtec-e and it has has a few different things then the ex and the other models have. Hx has a egr system and ive heard it has a 5 sire 02 sensor rather then the normal 4 wire.
So my question is will i be able to use my stock hx wiring harness or will i need to get a harness from a 99-00 ex?
Ive tryed to search this and ive read like 6 different things. Im looking for some legit answers here.
I know with the motor i will need a 99-00 ex computer, just trying to see if i need the harness aswell.
Thanks in advance.
#4
Honda-Tech Member
Thread Starter
Join Date: Jul 2006
Location: papillion, NE, USA
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
Re: d16y8 engine with hx harness?
i cant believe im not able to find any info on this. Its like noone has put a y8 in a hx before? I figured it would be a super common swap
#5
Seagull Management
Join Date: Jun 2008
Location: Miramichi, NB, Canada
Posts: 15,150
Likes: 0
Received 24 Likes
on
22 Posts
Re: d16y8 engine with hx harness?
Alright i have a 2000 civic hx with the stock d16y5. Motor is making some noise and has 230,000 miles so its time for a replacement. Im wanting to just do a y8 swap but im trying to get everything needed before we tear into it.
The hx is vtec but it is vtec-e and it has has a few different things then the ex and the other models have. Hx has a egr system and ive heard it has a 5 sire 02 sensor rather then the normal 4 wire.
So my question is will i be able to use my stock hx wiring harness or will i need to get a harness from a 99-00 ex?
Ive tryed to search this and ive read like 6 different things. Im looking for some legit answers here.
I know with the motor i will need a 99-00 ex computer, just trying to see if i need the harness aswell.
Thanks in advance.
The hx is vtec but it is vtec-e and it has has a few different things then the ex and the other models have. Hx has a egr system and ive heard it has a 5 sire 02 sensor rather then the normal 4 wire.
So my question is will i be able to use my stock hx wiring harness or will i need to get a harness from a 99-00 ex?
Ive tryed to search this and ive read like 6 different things. Im looking for some legit answers here.
I know with the motor i will need a 99-00 ex computer, just trying to see if i need the harness aswell.
Thanks in advance.
Both, automatics are a 3 wire, 5 speed is 2.
#6
Honda-Tech Member
Thread Starter
Join Date: Jul 2006
Location: papillion, NE, USA
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
Re: d16y8 engine with hx harness?
weird, thanks for the information. I greatly appreciate it.
So does it matter if the y8 i get is from a 96-98 or 99-00? I can get either one here in town. Is one easier then the other to use if i use my stock harness and 98 ex ecu?
Thanks again
So does it matter if the y8 i get is from a 96-98 or 99-00? I can get either one here in town. Is one easier then the other to use if i use my stock harness and 98 ex ecu?
Thanks again
Trending Topics
#9
Re: d16y8 engine with hx harness?
if anyone is reading and interested with my swap, i bought a exedy stage 1 clutch kit with 11lb flywheel to go with the y8 swap.
this coming friday i will be starting the y5 to y8 swap using y5 dizzy, harness, intake, and tranny. hopefully it fires and vtec at least engages no matter the rpm but if it doesnt engage i will be ok with it. if nothing works, the y5 is going back in and im going back to the drawing board....
this coming friday i will be starting the y5 to y8 swap using y5 dizzy, harness, intake, and tranny. hopefully it fires and vtec at least engages no matter the rpm but if it doesnt engage i will be ok with it. if nothing works, the y5 is going back in and im going back to the drawing board....
#10
Honda-Tech Member
Re: d16y8 engine with hx harness?
Doing a y8 swap into a 96 hx is not going to be easy. Even if you swapped ECUs, you're going to have the wrong o2 sensors on there and the length will be all wrong. The easiest and cheapest thing you can do if you're doing a Y8 swap is to keep your Y5 everything but the block and the valve head. Essentially you'll just use the Y8 for its head and block and not use anything else. If you try to use the Y8 manifold and distributor and other things, you'll be in for a major headache since they're different on the Y5. So sick of these people chopping up these HXs when they're already a rare breed of vehicle as it is. They'd be doing a world a service if they would focus their efforts to chopping up Civic DXs and LXs and putting Y8s in there instead of the rare Civic HX with its Y5 engine.
#11
Re: d16y8 engine with hx harness?
Doing a y8 swap into a 96 hx is not going to be easy. Even if you swapped ECUs, you're going to have the wrong o2 sensors on there and the length will be all wrong. The easiest and cheapest thing you can do if you're doing a Y8 swap is to keep your Y5 everything but the block and the valve head. Essentially you'll just use the Y8 for its head and block and not use anything else. If you try to use the Y8 manifold and distributor and other things, you'll be in for a major headache since they're different on the Y5. So sick of these people chopping up these HXs when they're already a rare breed of vehicle as it is. They'd be doing a world a service if they would focus their efforts to chopping up Civic DXs and LXs and putting Y8s in there instead of the rare Civic HX with its Y5 engine.
also the only reason im doing this is bc the y5 is done and needs a short time replacement while im building it and thats where the y8 comes in at.
#12
Honda-Tech Member
Re: d16y8 engine with hx harness?
well the only thing im using from the y8 is the block and head, the one thing that might not work is vtec, if it doesnt, the engine will still run. about sensors and stuff, its ok bc i have an open ehaust and a short ram intake.
also the only reason im doing this is bc the y5 is done and needs a short time replacement while im building it and thats where the y8 comes in at.
also the only reason im doing this is bc the y5 is done and needs a short time replacement while im building it and thats where the y8 comes in at.
#13
Honda-Tech Member
Join Date: Feb 2006
Location: SoCal, CA, USA
Posts: 245
Likes: 0
Received 0 Likes
on
0 Posts
Re: d16y8 engine with hx harness?
I had a 97 HX with 300k miles. I went ahead and had it rebuilt instead of getting an used engine. I want it keep it original plus I didn't want to hassle with the Smog police here in California. At the end, it didn't matter because I sold the car.
#14
#15
Honda-Tech Member
Join Date: Feb 2011
Location: Hollis, OK
Posts: 250
Likes: 0
Received 0 Likes
on
0 Posts
Re: d16y8 engine with hx harness?
what did the rebuild cost you? gonna do the same
#16
Honda-Tech Member
Re: d16y8 engine with hx harness?
it will engage at the same point as it always did, however when it engages, I'd imagine it'd feel a bit weird considering that it's engaging so early.. Again, if you change only the block and head, it should work exactly as it normally would though the power band will be all screwy with no low end power and then I'd imagine a power lull from 2500-4500rpm since it's engaging a cam and lift profile that is inappropriate for the power range.. I may notice this kind of stuff but you may not notice this kind of thing.. Anyway you're doing an engine rebuild and this is just to get you by anyway right?
#17
Honda-Tech Member
Join Date: Mar 2010
Location: Sunny SoCal
Posts: 138
Likes: 0
Received 0 Likes
on
0 Posts
Re: d16y8 engine with hx harness?
Doing a y8 swap into a 96 hx is not going to be easy. Even if you swapped ECUs, you're going to have the wrong o2 sensors on there and the length will be all wrong. The easiest and cheapest thing you can do if you're doing a Y8 swap is to keep your Y5 everything but the block and the valve head. Essentially you'll just use the Y8 for its head and block and not use anything else. If you try to use the Y8 manifold and distributor and other things, you'll be in for a major headache since they're different on the Y5. So sick of these people chopping up these HXs when they're already a rare breed of vehicle as it is. They'd be doing a world a service if they would focus their efforts to chopping up Civic DXs and LXs and putting Y8s in there instead of the rare Civic HX with its Y5 engine.
Second, the Y8 and Y5 use the same block, but with different casting numbers. Therefore, it wouldn't make much sense to swap the block. The differences for the Y8 and Y5 are as follows:
egr intake manifold (the y8 auto and manual are also different)
intake manifold gasket (y8 port flange is bigger than the y5 so it causes an air leak when using the y5 gasket)
rocker arm assembly (y8 has lost motions y5 has roller rockers) ***will post pics when battery is charged***
cam (y8 is vtec 3 lobe and y5 looks like a non-vtec) ***will post pics***
distributer
ecus (ex=p2p hx=p2n)
throttle body (hx smaller and needed with egr manifold)
o2 sensors (d16y5=5 wire wideband o2 sensor)
engine harness (hx=plug for egr and wired for 5 wire o2)
thermostat housing
exhaust manifolds
injectors(ex=larger injectors also look different)
All of this information was found here (Thanks CheeseWedge!).
And third, to actually answer the original question, according to my HELM manual, the 96-00 HXs use the same wiring harness. If you're going to use the HX harness, you're going to have to figure out what was added to the 99-00 Civic EX's D16y8 that makes them different enough from the 96-98s that warranted a new harness. If there are no changes, the HX harness will work, minus the EGR plug and 5th wire for the o2 (the EX uses 4 wire).
The original question was asked back in January and somebody bumped the thread. The only reason I bothered posting any of this was because I've been having a helluva time finding legitimate answers to my questions and I figured it might be easier for someone else to find in the future.
#18
Honda-Tech Member
Re: d16y8 engine with hx harness?
Second, the Y8 and Y5 use the same block, but with different casting numbers. Therefore, it wouldn't make much sense to swap the block. The differences for the Y8 and Y5 are as follows:
egr intake manifold (the y8 auto and manual are also different)
intake manifold gasket (y8 port flange is bigger than the y5 so it causes an air leak when using the y5 gasket)
rocker arm assembly (y8 has lost motions y5 has roller rockers) ***will post pics when battery is charged***
cam (y8 is vtec 3 lobe and y5 looks like a non-vtec) ***will post pics***
distributer
ecus (ex=p2p hx=p2n)
throttle body (hx smaller and needed with egr manifold)
o2 sensors (d16y5=5 wire wideband o2 sensor)
engine harness (hx=plug for egr and wired for 5 wire o2)
thermostat housing
exhaust manifolds
injectors(ex=larger injectors also look different)
All of this information was found here (Thanks CheeseWedge!).
And third, to actually answer the original question, according to my HELM manual, the 96-00 HXs use the same wiring harness. If you're going to use the HX harness, you're going to have to figure out what was added to the 99-00 Civic EX's D16y8 that makes them different enough from the 96-98s that warranted a new harness. If there are no changes, the HX harness will work, minus the EGR plug and 5th wire for the o2 (the EX uses 4 wire).
The original question was asked back in January and somebody bumped the thread. The only reason I bothered posting any of this was because I've been having a helluva time finding legitimate answers to my questions and I figured it might be easier for someone else to find in the future.
egr intake manifold (the y8 auto and manual are also different)
intake manifold gasket (y8 port flange is bigger than the y5 so it causes an air leak when using the y5 gasket)
rocker arm assembly (y8 has lost motions y5 has roller rockers) ***will post pics when battery is charged***
cam (y8 is vtec 3 lobe and y5 looks like a non-vtec) ***will post pics***
distributer
ecus (ex=p2p hx=p2n)
throttle body (hx smaller and needed with egr manifold)
o2 sensors (d16y5=5 wire wideband o2 sensor)
engine harness (hx=plug for egr and wired for 5 wire o2)
thermostat housing
exhaust manifolds
injectors(ex=larger injectors also look different)
All of this information was found here (Thanks CheeseWedge!).
And third, to actually answer the original question, according to my HELM manual, the 96-00 HXs use the same wiring harness. If you're going to use the HX harness, you're going to have to figure out what was added to the 99-00 Civic EX's D16y8 that makes them different enough from the 96-98s that warranted a new harness. If there are no changes, the HX harness will work, minus the EGR plug and 5th wire for the o2 (the EX uses 4 wire).
The original question was asked back in January and somebody bumped the thread. The only reason I bothered posting any of this was because I've been having a helluva time finding legitimate answers to my questions and I figured it might be easier for someone else to find in the future.
#19
Honda-Tech Member
Join Date: Feb 2006
Location: SoCal, CA, USA
Posts: 245
Likes: 0
Received 0 Likes
on
0 Posts
#21
Honda-Tech Member
Join Date: Feb 2011
Location: Hollis, OK
Posts: 250
Likes: 0
Received 0 Likes
on
0 Posts
Re: d16y8 engine with hx harness?
check pins on the harness for the speed-o. Mine did not work on my y7 install and I finally found that the middle socket on the harness was half missing like it rusted off. So it was not contacting. Solved with a little tin foil shoved into the socket for now until my new plug gets here.
As for vtec, check out the solenoid
As for vtec, check out the solenoid
#22
Re: d16y8 engine with hx harness?
check pins on the harness for the speed-o. Mine did not work on my y7 install and I finally found that the middle socket on the harness was half missing like it rusted off. So it was not contacting. Solved with a little tin foil shoved into the socket for now until my new plug gets here.
As for vtec, check out the solenoid
As for vtec, check out the solenoid
#23
Re: d16y8 engine with hx harness?
ive got vtec working, it hits at 2800 and pulls nice if you just lay smooth into it but if you straight gun it it wants to go in and out... i also almost messed up bad, i forgot to put a clamp back on completely in the back side of the motor and it come off today when i revved it pretty high and i think i drove it only about 4 miles without being full of water.
#24
Honda-Tech Member
Join Date: Mar 2010
Location: Sunny SoCal
Posts: 138
Likes: 0
Received 0 Likes
on
0 Posts
Re: d16y8 engine with hx harness?
I care because the Civic HX is a rare car and most people who do these modifications are doing it for entertainment value and when they're done with it, they're just going to dump the car like a piece of trash either because they're bored with it now or they so royally ****ed it up beyond belief that they don't know how to salvage it. I'd rather people do this to the vanilla civics than the rare ones since these were designed with fuel economy in mind and I'm sure there are people who could use a good working lean-burn civic.
The o2 sensor may be a 5 wire but the plugs are completely different since they're an 8 plug design with one pin missing. Also the distributor plugs are also different since the distributor is more advanced than on the other cars.
You think you've had a hella of a time, how about me who is trying to do an HX swap into his car but can't because retards think it'd be a sweet idea to butcher up these cars beyond recognition and then just dump the parts that I need when they can't find a use for them. If you want to do a swap, fine but make it a complete swap because there are people out there actively seeking an HX swap and are having no luck because idiots want to make "mad power" with these cars.
#25
Honda-Tech Member
Join Date: Mar 2010
Location: Sunny SoCal
Posts: 138
Likes: 0
Received 0 Likes
on
0 Posts
Re: d16y8 engine with hx harness?
ive got vtec working, it hits at 2800 and pulls nice if you just lay smooth into it but if you straight gun it it wants to go in and out... i also almost messed up bad, i forgot to put a clamp back on completely in the back side of the motor and it come off today when i revved it pretty high and i think i drove it only about 4 miles without being full of water.
Glad you've got it running. You're running a 99-00 ECU?