Ordering my JDM H22 today, what else do I need? - Honda Prelude Forum

neoGTR22 · 10-12-2004, 11:25 AM

I'll be ordering a JDM H22 from Hmotors today. Comes with the motor, tranny and more...

http://www.hmotorsonline.com/shop/sc...age&item=30015

It'll be going into my 92 Si. Tho I'm not certain whatelse I'll need.

1. Do I need a different intake or will the H23 mate up with the H22?
2. Will a timing belt kit for a USDM H22 work with the JDM H22?
3. Will spark plug wires and plugs for a USDM H22 work with the JDM H22?
4. Same question for a clutch kit/flywheel.

I have a Brullen exhaust for an H22 and I figure I'll need to order the downpipe and the cat.

Thanks in advance

selude · 10-12-2004, 11:37 AM

it will come with everything that you need except the intake which the factory one will work fine the plugs, wires and all are there --- you will just have to use you re wiring harness of the h23, the distributor, P13 ecu which came with the swap, also you will need to run new wires for the vtec solenoid and pressure switch mine was already prewired for this so all I had to do was run it through the fire wall and connect it to the green/yellow wire ,,, other than that it should be plug and play also I would replace all belts and put a new clutch in ....

yohan420 · 10-12-2004, 12:01 PM

1. No, keep your H23 intake, it will work

2. Yes - Timing belt kit for USDM H22 works with JDM. I just did this so I know.

3. Maybe - Keep your H22 plugs & wires, or buy new ones for the JDM H22 (that are USDM h22 spec), you need to use your H23 distributor. It's the same as USDM H22. Get a new bracket to mount the coil.

4. Clutch/Flywheel is actually the same for H23 and H22, if yours is good and you want to save a buck, keep it, BUT, if you want to avoid having to do your clutch sooner than later, replace it now.

My strategy was to put in an IM gasket, Cam Seal, timing belt, water pump, manual tensioner from H23, balancer belt (optional, you can leave the belt off) and oil pan gasket all with the engine out of the car. I also got 2 new axles, Exedy Stage1 Organic Racing clutch, & OEM flywheel. All H22 / 93 Prelude Vtec parts. I got new plugs, dizzy cap and rotor also.

I re-used my H23 wiring harness and added plugs for Vtec to my existing harness. The Vtec stuff is a bit funny so if you need specific help, PM me and I can help you out.

You will need an H22 downpipe as well, you can modify the bolt pattern off the H23 Cat converter to bolt it up ... if you get an aftermarket header, awesome .. get the Ebay test pipe/High flow cat which is basically a resonator (dampens noise) and cat back exhaust too while your at it if you want to ...

So far, I just need to get an aftermarket header / ebay high flow cat and im set.

go buy a bunch of Glad ziplock bags, BIG ONES.. a sharpee and masking tape. Write down everything, every plug.. do the wiring harness last so your familiar with where everything goes and its fresh in your memory.

neoGTR22 · 10-12-2004, 12:47 PM

Quote:

Originally Posted by selude

it will come with everything that you need except the intake which the factory one will work fine the plugs, wires and all are there --- you will just have to use you re wiring harness of the h23, the distributor, P13 ecu which came with the swap, also you will need to run new wires for the vtec solenoid and pressure switch mine was already prewired for this so all I had to do was run it through the fire wall and connect it to the green/yellow wire ,,, other than that it should be plug and play also I would replace all belts and put a new clutch in ....

I'm a bit confused about the Wire harness. The hmotors site says it comes with the engine harness, so this is different from the wire harness? My lude is a 92 Si so from what I understand it's not prewired for Vtec. Where can I get the harness from? Or is it simple enough to make one? Thanks.

Thanks for the quick replies all.

red92s · 10-12-2004, 01:08 PM

Quote:

Originally Posted by neoGTR22

I

1. Do I need a different intake or will the H23 mate up with the H22?

To back up Yohan . . . No. The intakes between S, Si, and VTEC's are interchangable.

Quote:

Originally Posted by neoGTR22

2. Will a timing belt kit for a USDM H22 work with the JDM H22?

Yes . . . again, just to back up Yohan

Quote:

Originally Posted by neoGTR22

3. Will spark plug wires and plugs for a USDM H22 work with the JDM H22?

Yes. However your H23 wires will NOT work on a JDM or USDM H22. The H22 wires have much longer plug boots because the head is much taller (to accomidate VTEC componentry).

Quote:

Originally Posted by neoGTR22

4. Same question for a clutch kit/flywheel.

Both should be perfectly interchangable between h23/USDM H22/ JDM H22

Quote:

I'm a bit confused about the Wire harness. The hmotors site says it comes with the engine harness, so this is different from the wire harness? My lude is a 92 Si so from what I understand it's not prewired for Vtec. Where can I get the harness from? Or is it simple enough to make one? Thanks.

The harness included with your shippment is for a JDM (right hand drive) car. As such, the wiring harness enters the firewall on the left side of the firewall and not the right side as in USDM cars (relative to driver). Because of this difference, the JDM wiring harness is essentially worthless to you . . . EXCEPT for the connectors. You will need to reuse your H23 engine wiring harness, and add several additional wires for VTEC operation (with plugs vandalized from JDM harness).

It sounds like you haven't read through the extensive JDM H22 installation writeup posted in the 4th gen FAQ (see sticky, top of page). I recomend you look through it SEVERAL times and then come to us with anything you are unclear about. For your convienience:
Install JDM H22 fo' shizzle

neoGTR22 · 10-12-2004, 01:10 PM

I've gone through the fact but your right, I haven't gone through extensively as my friend will be doing the swap. Thanks for the explanation red92s.

Just curious how important is it for me to get the Compression numbers? I figure Hmotors is pretty reliable. Steve from Hmotors says "it should be 225 across the board." So it doesn't sound like he actually went and checked. Should I make him before I make the purchase?

red92s · 10-12-2004, 01:19 PM

Quote:

Originally Posted by neoGTR22

Just curious how important is it for me to get the Compression numbers? I figure Hmotors is pretty reliable. Steve from Hmotors says "it should be 225 across the board." So it doesn't sound like he actually went and checked. Should I make him before I make the purchase?

Hmotors has a fairly solid reputation, so I would be inclined to trust Steve. You could easily check the compression before you install the motor using a battery and remote trigger. However, static compression numbers are really a very poor indicator of engine condition, a dynamic (leakdown) test provides much better results but requires much more expensive test equipment.

neoGTR22 · 10-12-2004, 01:30 PM

Gotcha, thanks so much Red92s and everyone else. I'm placing the order as soon as I'm off.

NoShoNoGoAccord · 10-13-2004, 11:02 AM

I helped swap my H22 into my 92 Si. VERY good learning experience. It was well worth it. I do miss the bottomednd torque difference, though.

I cleaned my motor before it went into the car, too. I replaced the clutch, flywheel, axles, ALL of the seals, H23 timing belt tensioner, oil pump, timing belt, balancer belt, hoses, plugs, Hondata intake manifold, and a few other things.

I cleaned the engine bay, and painted the accessory brakets and header cover with high temp black paint. I throughly cleaned out the intake manifold, too.

Overall, I am VERY happy.

If you are looking for a newer (15K miles) Exedy OEM clutch set and an OEM flywheel that has already been resurfaced, let me know, I have the set for sale. I am looking to get $100 for the combo and I live in Maryland so we can meet up.

Good luck with the swap.

Andy