Well, I did a search on the forums and didn't find any topics on this, but my cousin just called me and said he got his JDM engine in finally. I went over to check it out. Only to see that he was ripped off for a USDM engine and not a JDM.

Now for all you guys/gals that are going to be doing a JDM engine swap please keep in mind that ALL JDM engines will not have a # after the initial 4 letters/numbers. For example:

B18C1/3/5(USDM) - B18C(JDM)
B16A1/2/3(USDM) - B16A(JDM)

Another hint:
JDM valve cover will have DOHC inSMALLER print and VTEC inBIGGER print.
USDM valve cover will have DOHC in BIGGER print and VTEC in SMALLER print.

I felt after doing a search on the forum and not finding anything about this I want everyone here to know and how to tell a difference from a JDM and a USDM engine. It's just the worst case when you paid for a JDM engine and you get sent a USDM one.

 

so how do you tell which b18 it is if it doesn't have the number designator?

 

the jdm motors will have the honda stamp on the block right under the engine code.

 

Good to know.