I have a 2002 civic hx with 275000 miles on it and im looking to do an engine swap to an ex, what all would I need to do to swap my engine from the hx to an ex? im a completely new with anything Honda.

 

Please look through the FAQ's here: https://honda-tech.com/forums/honda-civic-2001-2005-78/faqs-guidelines-read-before-posting-2101211/

The topic regarding swapping to a D17A2 has been covered in depth.

 

im a newbie lol and know nothing about Honda engine or cars other than I have owned one for 4 days. I don't even know what a d17a2 is.

 

non-VTEC engine - D17A1
VTEC version of your engine - D17A2

 

does that cover all years? is there a place to learn more about this?

 

 

you getting bashed here too?!?
if you found this site and the other, you should be plenty able to find the answers without asking... yer choice, i guess...

 

im just not finding what im looking for I guess. it seems for every answer I find another person says the opposite. im just asking if anyone has done this and what they did.

 

Nobody is bashing here, so you're misreading something.


The engines don't vary much at all. You'll need the EX ECU, engine harness, and (obviously) the drivetrain. You'll have to get the immobilizer re-coded at a Honda dealership, but the rest you should be able to do in the garage with basic tools.

 

that's more of what im looking to hear, what exactly is different in the engine harness?

 

Well, obviously VTEC control. But, to be honest, there are a few other things that are switched around (if memory serves me right). I think the VTEC head-swap guide in the FAQ's might have more information on the subject, but its been a while since I've looked at it.

 

so its not just as easy as buying a computer from an ex and engine and just plugging in the computer and bolting a new engine in.

 

It is, kinda
You will need a EX ecu to run the ex engine, since the hx is a lean burn vtec the ex engine might not respond properly. when you swap out an ecu you need to go to a dealer to reflash it to your key

I think the hx harness might be different because I know the o2 sensors are different between ex and hx, even though they both have vtec