What is the difference between jdm an usdm itr cyl. head as far as sensors and whatever else.. thanks. in otherwords, anything special needs to be done to use jdm head inside usdm itr?

 

your question.

wait. do you mean will it be compatible, fit, work. yes.
difference. you mean beside emission.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rjgerolaga &raquo;</TD></TR><TR><TD CLASS="quote">your question.

wait. do you mean will it be compatible, fit, work. yes.
difference. you mean beside emission. </TD></TR></TABLE>

i know it will bolt up, i'd like to know the differrence as far as sensors go.. as in whats different or missing

 

The only difference directly on the head would be the VTEC solenoid. The JDM solenoid doesn't have a VTEC pressure switch on it like the USDM one. You can easily swap your USDM solenoid onto the JDM head and have it function like normal.

If you want to use the JDM solenoid with a USDM ECU, you'll simply have to bypass the VTEC pressure switch function in the ECU. To do this you have to jump one of the VTEC pressure switch pins to one of the VTEC solenoid pins. Do a search and it will come up (very simple). This is how my JDM motor is setup in my Civic with USDM ECU...

The only other differences will turn up on the manifold. I believe the vacuum ports might be different for the EVAP system. I've only worked on a JDM manifold, so I can't be sure...

 

thanks, anybody else?? so the only difference then would be solenoid which can be swapped so thats good. then fuel/crankase evap hoses only or is there certain sensor holes present on usdm and can not be found on jdm, thanks

 

The only other difference is the JDM motor is missing the crank-flux sensor on the oil-pump. This is on the block though, so I didn't bother saying anything about it. I'm pretty sure thats it. I'm confident because I installed my JDM B18C in my Civic and wired it according to the USDM shop manual. I did all the research and these are the only differences that came up...