Inital progress on the obtaining a replacement engine for my 5th Gen has been good.
I picked up a low milage JDM H22A series motor... that's actually in very good condition.
The goal is to convert it from JDM OBD-I to USDM ODB-II.
Unlike everyone who's dieing to get a P13 ECU and swap to OBD-I, I'm interested in staying stock (relatively) and converting the JDM motor to ODB-II. (If for no other reason as OBD-I in a 5G will not pass inspection.)
Onto the list of things you need to swap over:
1) The P5M (USDM H22A4) motor wiring harness.
2) The H22A4 knock sensor - the connectors are different.
[Be careful unplugging it, I broke mine trying to take it off and I was really careful.]
3) The H22A4 VTEC Solenoid - the connectors are different.
4) The H22A4 oil pump assembly.
5) The CKP and TDC sensors - don't exist on the OBD-I H22A.
6) The crank shaft pullies... all of them. Required for the sensors in #5 to work.
7) The oil pan and baffel from the H22A4 - required to mount the stiffener and, therefore, the transmission on the 5th Gen.
8) H22A4's Distributor
9) The H22A4's Intake (The JDM H22A series is slightly different.) If you don't use the H22A4's intake, then you need to move your injectors over as they are different!
10 The H22A4's Exhaust Header
In addition, it's a good idea to repalce the following:
1) Thermostat
2) ALL of the SEALs on the timing belt (left) side of the motor.
3) The cam seal and right side crank seal.
4) A Hondata Intake manifold gasket.
5) New cap, rotor, spark plugs, wires.
6) New exhaust manifold gasket.
7) New draft shaft output seals for the transmission. (They are not the same part on each side!)
8) Probably a new fuel filter... as it's really easy to repalce with the motor out.
9) All new fuel injector seals...
10) All new valve cover seals (plug holes, gromets, cover seal).
11) New timing belt, balancer belt, and water pump.
That's all I can think of at the moment...
We got everything transfered and put together on the new long block.
Didn't have time to put it back in... and I'm waiting for a knock sensor.
You are using the 5th gen alternator as well since the connectors are different.
VTEC solenoid should be the same.
You also need the 5th gen thermostat housing since the hole for the ignition coil bracket is not thread on the JDM one.
Keith
Thermostat housing... Yep... just noticed that.
The VTEC solenoid connector is different for the actuator attached to the top of the assembly.
So I had to change that part over.
I'm wondering if the knock sensor will be an issue? The H22A is a closed block and the H22A4 is an open block... sooooo.... the resonance could be different during knocking.
sorry for the newby question - but why not just get a obd 2 h22a? is it just the cost of a obd 1 vs a 2 jdm spec h22a? wouldnt doing the swap on this be easier?
I know this is a old old post but we are in the process of doing a a swap! We yanked out the h22a4 and got a jdm h22a. When running the usdm wiring harness we saw the plug in for the distributor was diffrent. The usdm has 2 plugs and the jdm one has one plug. Also the usdm distributor does not mount to the block bc the it doesent fit into the cam shaft. I need help and am doing alot of research and cant seem to find what i need. Thanks
I know this is a old old post but we are in the process of doing a a swap! We yanked out the h22a4 and got a jdm h22a. When running the usdm wiring harness we saw the plug in for the distributor was diffrent. The usdm has 2 plugs and the jdm one has one plug. Also the usdm distributor does not mount to the block bc the it doesent fit into the cam shaft. I need help and am doing alot of research and cant seem to find what i need. Thanks
The only thing I can think of is to make sure the 'tabs' on the distributor shaft are correctly aligned with the slots in the end of the camshaft - it'll only go in ONE WAY because they're slightly offset from center just enough. Otherwise the timing would be 180 degrees off. Other than that. . .?!??!
Hope this helps!!!
(Especially since I'm always on one of these forums LOOKING, for answers instead of PROVIDING 'em, ya know?!?)
yes you can. We did it. They were diffrent plugs so what we did is take the usdm dis tooth off and transfer the jdm tooth onto the usdm one. And then your fine. By tooth i mean the metal piece that locks into the cam shaft.
Hey Guys...
I just wanted to apologize to you UA~ with regards to my answer/reply to your 10/5 post since I obviously misread it and was slightly off base, i.e. WRONG!
I understand what you did to make the A4 dist end shaft fit onto the A head, (i.e. get the 'tooth', or 'tabs' as I referred to them as, to mate with the camshaft... [Since I used the cyl head from the A4, that wasn't a problem for me - think that's where I 'missed the boat in my reply?!?]). Didn't mean to insult your intelligence, since in retrospect I'm sure you obviously would've already tried what I suggested. . .
I find it 'interesting' that in all of the posts and information I found prior to doing my swap this past summer, NOWHERE did I find this issue addressed?!? The distributor was just on the list of things to bring over from your A4 engine - just as Gerhard did here in the first thread - #8!
Also, I have to wonder why you're told to swap things simply because of some minor differences?!? E.G. I broke the Knock Sensor off of my A4, but just used the one from the A by simply taking the wiring plug off the A's harness and swapping that, vs spending $50+ on a new one! And like the Thermostat housing ass'y (Keith's post below...) just because a hole isn't threaded?!? So use a bolt and a nut, or a self-tapping screw?!? It's just the coil mounting bracket, nothing cruicial!!! Just......don't quite get it, ya know??! Ok, enough... Have a good one!
ok i know all these post are old but experience is a good thing i am doing the usdm-jdm swap the h22 i would like to know what i need so far i have all usdm h22 externals a tuned p28 ecu and the jdm long block what all will i need i am not in ca so i dont care about passing emissions since we dont have them. and i was wandering if my usdm harness will work too thanks guys in advance
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