LB98ekhatch

so my valves ran into my pistons so im replacing the whole head.

i have a 96 civic with a stock sohc vtec y8

i'm buying from a friend a 95 z6 sohc vtec head, i'll run my distributor from my y8.

heres the main thing, the z6 comes with supertech valvesprings and retainers running STOCK camshaft.

will it pass smog? (CA state emissions)

cmc600rr

I dunno if this matters but I thought any engine modification like heads or the block or the entire motor had to me the model year or newer.

LB98ekhatch

asdf

john666

i believe it should as long as all your smog stuff is still there.. ( cat)

LB98ekhatch

anyone else?

LB98ekhatch

damn hondatech succs now, no help at all

dividedas1

im willing to bet if they realize its an older head you will fail :/ but then again idk about cali laws. its a little bit more easier here in iLL to pass emissions (no emissions required for odb1 cars)

teamworxek9

iTrader: (5)

valvetrain shouldn't make you car fail smog.

94EG8

He's swapping the whole head though, which happens to be where the date code is stamped.

sir2ya

I will be helpful and say IDK...

LB98ekhatch

thanks alot...

teamworxek9

iTrader: (5)

but just swaping a head i wouldnt think they would look at the date codes.

24TEN

iTrader: (2)

I couldn't say yes or no to the original question BUT I can point out a couple of key things that could possibly effect your smog outcome.

Visually, it would fail IF and ONLY IF they notice the head is incorrect. It is true that the motor of the car has to be the same year or newer but a replacement head swap is sort of a gray area. If the tech is knowledgeable and looks for that sort of thing then yeah, you have a good chance of failing visual (but maybe the tech won't care who knows).

For emissions I couldn't see aftermarket valve springs having a negative impact on your emissions but the thing is that the Z6 head has a higher volume combustion chamber than your Y8 head does. Having said that, your compression ration should actually go down. That's what you really have to worry about. If I'm not mistaken, my buddy (who is a smog tech) told me that lowering compression shouldn't hurt.

If you want some actual hard info, hit "thesmogman" on here. He's very helpful and knowledgeable with this type of stuff...obviously because it's his profession

LB98ekhatch

well i found another head, its light port & polished. if i dont want to go trough the stress with the z6 head i minus well get this y8.

pics:
http://jase-ace.com/public/photo/For...0Head%2001.jpg

http://jase-ace.com/public/photo/For...0Head%2002.jpg