[panteraismetal]

Just wanted to start a thread about this swap. My swap was necessitated by blowing my motor. I found a cheap k20z3 motor and tranny with low miles for 2k. Motor mounts are exactly the same at least for 02-04. I have swapped the VSS sensor on the tranny. Local machine shop drilled out the hole for 40 bucks or u can buy an expensive large drill bit that u will never use again. There is a detailed post on this site on how to get the sensor to work. Just a tip if u try this, if u take the case apart to get the speed sensor gear on, make sure u put the reverse idler gear on the right side up. If u don't, when u get it all back together it will be stuck in reverse and u won't be able to get the gear selector back in. I have swapped all original sensors from my k20a2. some are the same but swapped them all just in case. I will post more info once i get everything put back together.

 

[panteraismetal]

One slight problem I came across is that the lower coolant nozzle on the motor points up and to the right instead of down and to the right like its suppose to. I had to cut and modify two hoses and coupled them together with a cheap hose coupler from the hardware store. The original RSX type S belt works also. K20Z3 belt is too short. Finally finished putting everything back together and the starter doesn't work. So i'm going to use the K20Z3 starter. The smaller wire connector was redesigned to have plug instead of just a wire connector that slips over a flat piece of metal. So the wire on my harness will still slide right on no problem.

 

[mix]

interesting. Any pics? Also what did you end up using for the TB?

 

[talonxracer]

So what are you doing about the reversed gear pattern of the Z3 shifter assembly on the trans?

 

[panteraismetal]

I used my original Type S throttle body with a RBC intake manifold with the adapter. and also used the original gear selector from my RSX on the transmission. Finally got it running last weekend after several small issues. Runs great . No pics sorry. the motor looks just like the RSX motor but i did upgrade to innovative track mounts and the RBC intake manifold

 

[04rsxbase]

Did you use an adapter plate for the tb or did it bolt right up?

 

[LotusElise]

@04rsxbase, the following may clarify your question already.

original Type S throttle body with a RBC intake manifold with the adapter.

You need an adapter plate, as these two TB's are not interchangeable. Not from control side, nor from mount side. Adapter plates are offered in the aftermarket.

 

[04rsxbase]

Okay thank you

 

[LotusElise]

You are welcome. Did you find an adapter flange you need for that, or should I link it in a PM?