Hello, i hope no body gets on me for this post but i have done a lot of research about this and have read mixed feeling on this topic which makes me confused. i would like to hear from someone who has done this or know the facts about it and if it will work or what needs to be done to make it work. i think you in advanced for you help and you knowledge.

i have a 1996 civic ex which the d16y8 head is bad. i was going to get the head worked but my cousin gave me a perfectly good d16y5 head which he just had the valves and valve seals replaced along with getting i milled and compression tested. i just need to know will i be able to replace my d16y8 head with the d16y5 head? keeping all the d16y8 stuff like the intake manifold and ecu? i know that the d16y5 head is a vtech-e and only uses 12 valves until around 2800 rpm when the vtech opens the remaining valves.

please let me know if i can just replace my y8 head with the y5 head or what i would need to do to make it work and if its even worth doing. i just figured that i could save some money by using the d16y5 head instead of getting my y8 head worked.

thanks

 

Nope.

 

is there any was to make it work?

 

Put all the Y5 parts on the block, including the ECU and all the emissions equipment maybe. Parts on these cars are readily interchangeable but they aren't Legos. Just because you got something for free doesn't mean it is a good idea to try and make it run.

Sell that head and get the proper Y8 head to keep your headaches to a minimum.

Doing more research right now. Basically it's the same as a d16y8 head, but it has roller rockers and a different cam. Might run like crap.

 

Eh. Physically, it will fit. No information on how it runs since what you're doing is downgrading the engine and no one really does that kind of thing. It might run like crap on that Y8 ECU and that camshaft.

 

Yeah, the bottom line is that the Y5 head is a functional mismatch for Y8 ECU. The set up will never run correctly.

 

can i take the whole y8 camshaft assembly with the rocker and put it on the y5 head?

 

Hmmm...not sure. It's possible but wait for somebody more knowledgeable on this topic to chime in.

 

Topics I read suggest that it can be done but I've heard nothing about it being done. The castings are the same so it should be possible.

 

The casting of the head itself is the same. The valves are the same part numbers. The only parts that are different are the rockers, springs, and cam.

It's entirely possible, but you'll need to strip the entire head down.

 

I think you guys just made the OP happy.

 

so i just need to swap out this entire assembly?

/Users/postelljr/Desktop/DSC00517.jpg

 

not sure how to insert a pic

 

Upload it to a site, such as www.imgur.com (no account registration needed), then post the "BBCode Link" they give you.

You need to swap everything except the valves.

 

 

just the stuff pictured above? i don't have to mess with the valve springs right? just unbolt the items in the above pic and swap that stuff?

 

Dude. Just take a picture of both heads. Even video. Then make the Y5 head look like the Y8 head. Label the parts as they come out/off and make note of where they go on the head. Installation is the opposite of removal. Stop looking for a step-by-step because there isn't one. It's just a puzzle for chrissakes.

 

The valve springs on one side are different. I do not know what that difference is, but I believe the Y8 cam has a higher lift than the Y5 does. If I'm correct about that, then the Y8 springs are probably tighter than the Y5 springs. Also, the Y5 having looser springs would make sense, because that would reduce how much work the motor would have to do, thus increasing gas mileage.

You should replace the valve springs. You should replace everything that isn't the blank head, and the valves.

 

if the springs are different, then yes, you need to remove and replace them. its easier than the rest.

 

Wait a minute. What is "bad" about the Y8 head?

 

has a crack in it

 

Get a copy of the field service manual online (Google it) and use it to make the Y5 head look like the Y8 head.

 

really, just check out a how to video/write up on how to change valve seals. it is almost everything you need to do

 

Take apart one head at a time, label where each part came from, cylinder 1, cylinder 2,etc..etc.. Do the same for the second head and start putting together head you want to keep with all the y8 parts. As for valve springs you might want to cross reference the parts on a honda site to confirm that.