99_SH

I blew a rod in my 99 prelude, and am planning to buy a JDM block which is already OBDII. My question, is this a direct swap? I'm guessing the dizzy, ecu, and all sensors are identical. yes?

SteveoBA8

should be just make sure its an sh block if thats what you have.

TH22EK9

no, they are not the same. the oil pump is different because the jdm engines do not have ckt (crank angle sensors) located on the pump. the dizzy is also different, but you can swap your current dizzy over. also, the alternator plug is different. all things that are different can be swapped over from what you already have since the actual block and head are the same. like the dude above me said, make sure you get the right engine for the car.

99_SH

I disagree with what you're saying. For OBDI versions of the H22 the CKP sensor is in the dizzy. But for OBDII JDM motors, isnt it identical to the US counterpart? I'm assuming the OBDII motor doesn't have the sensors relocated to the dizzy...

TH22EK9

no. obd2 ckt is not located on the oil pump. the jdm engines don't have as strict emissions laws therefore no obd2 jdm engine has a ckt located on the oil pump. this is also why the jdm engines don't have another o2 sensor.

before you try to ask questions and then try to correct my answer, maybe you should do a search first. biotch.

SixguN

J00 got p00ned lik3 t3h n00b

99_SH

I think you may have been mislead or don't know how OBDII works. Due to OBDII vehicles requiring that misfires be detected, the ECU uses a trigger(2 teeth on crank) to detect the speed of the crank. When acceleration is not detected(delta crank speed) during a firing stroke, it concurs that a misfire has occurred. So having the CKP sensor on the cam(OBDI) isnt acceptable for OBDII, as cam lash would cause too much of an intolerance.


Modified by 99_SH at 4:22 PM 11/16/2005

redtop22

how can you ask for help and then disagree with what the person is saying?

TH22EK9 is correct. JDM H22As have a their own oil pump, distributor, as well as alternator.

Also the motor maybe be either OBD2A or OBD2B depending on the year of production

accordm3

all 5th gen preludes were obd2a

redtop22

Yes, USDM H22A4s were all OBD2a. JDM H22As can be either.

TH22EK9

do like your name and SHhhhhh

TH22EK9

can i get a SHhhhhh

TH22EK9

99 bottles of SHhhhh on the wall, 99 bottles of SHhhhh the expletive up