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H23a VTEC Swap

 
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Old 04-29-2014, 06:56 PM
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H23a VTEC Swap

I went ahead and purchased a low mile H23a VTEC that i will swap in my Prelude.

I will be updating this thread with pics as i go along. Will be pulling the H22 on the Monday coming up.

Ordered new water pump and valve cover kit with belts, oil pump, valve cover gasket, Hondabond and spark plugs and wires.

Anything else that I might be missing that is recommended to swap before dropping the motor in?

Update #1 (4/29/14): Engine transported to home. All parts ordered and are pending delivery.

Update #2 (5/6/14): Parts delivered. H22 removal scheduled for Thursday. Will post pics soon.

Update #4 (5/9/14): H22 has been officially pulled!! Updated with pics.





Update #5 (7/18/14) New pic of final product - Swap was completed in June since didn't have much time to work on it due to work


Last edited by chillhax; 07-18-2014 at 03:52 PM.
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Old 04-29-2014, 07:13 PM
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Re: H23a VTEC Swap

sounds cool, why'd u decide on the h23?
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Old 04-29-2014, 07:20 PM
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Re: H23a VTEC Swap

Decided on the H23 since there is an abundance of these engine in my area and there really wasn't any H22's to pick from that were in good shape. Got to pick out of several H23's and ended up getting the cleanest one out of the bunch.
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Old 04-29-2014, 10:12 PM
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Re: H23a VTEC Swap

Front main, balance shaft seal, cam seals. I would definitely replace while everything is apart while doing the timing belt. Also when doing the timing belt buy a new auto-tensioner or swap in a h23a1 Manuel tensioner or a kstuned Manuel tenesioner(works great IMO) Do not reuse old auto tensioner.

I highly recommend buying/ replacing: Cam cap seal, dizzy o-ring. I figure while its apart might as well.

Valve cover gasket/ spark plug hole grommet things and Vtec solenoid gasket should be fine but if they leak they are simple and easy to replace.
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Old 04-29-2014, 10:13 PM
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Re: H23a VTEC Swap

Will you be using your factory ecu? Or putting a chipped p28/p72 in?
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Old 04-29-2014, 10:41 PM
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Re: H23a VTEC Swap

I'm going to run a stock ecu for the meantime. Any downsides to sticking to factory ecu?
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Old 04-29-2014, 10:56 PM
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Re: H23a VTEC Swap

Its mapped out for an h22a4 not an H23a so it wont run to its peak performance, but it will still run fine, beyond that idk. just make sure you use your engine harness off the Old H22a4 and all the sensors. And be careful not to break any sensors either, some of them are delicate.
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Old 04-30-2014, 09:57 AM
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Re: H23a VTEC Swap

Depending on how many miles you have, you might want to clean your egr ports while everything is easy access. I just did the H23a vtec swap into my 95. I got the H23 for the same reason you did, all the H22s i saw were dirty and all the H23s looked pristine. Im running the stock ecu and it does run fine, but i cant help but feel the engine has more potential. Good luck, let me know if you have any problems.
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Old 04-30-2014, 02:45 PM
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Re: H23a VTEC Swap

I'll be extra careful with sensors since i don't wanna have to spend more on minor parts that could have been re-used.

Was not going to even touch the auto-tensioner. What can happen if i leave the old one on?
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Old 04-30-2014, 04:17 PM
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Re: H23a VTEC Swap

I believe all h23s have the manual tensioner, if yours doesn't I highly recommend getting one. what was wrong with your h22?
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Old 04-30-2014, 04:41 PM
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Re: H23a VTEC Swap

the H22 is fine only burning mass amounts of oil and smoking out the exhaust every time i step on the gas. I leave a huge cloud of smoke every time i come to a stop. Many have pointed to the oil control rings, so just went ahead and purchased a fresh h23a vtec to throw in there
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Old 04-30-2014, 04:57 PM
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Re: H23a VTEC Swap

Not a bad idea. The H23 will be a good platform if you decide to go super car later.

Nice n flat torque curve potential from what I've read.
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Old 04-30-2014, 05:32 PM
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Re: H23a VTEC Swap

were in cali are you? I may be interested in your head if it's for sale
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Old 05-01-2014, 11:18 AM
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Re: H23a VTEC Swap

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Originally Posted by chillhax View Post
the H22 is fine only burning mass amounts of oil and smoking out the exhaust every time i step on the gas. I leave a huge cloud of smoke every time i come to a stop. Many have pointed to the oil control rings, so just went ahead and purchased a fresh h23a vtec to throw in there
Get new pulleys and replace all gaskets and seals on the way while you're at it.
Also, lude auto tensioners are known to fail and if yours does, belt could skip teeth, and well, you might have to say goodbye to your valves..
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Old 05-01-2014, 12:34 PM
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Re: H23a VTEC Swap

Your also not supposed to reuse the auto tensoner. At least thats what my Master Honda Tech dad says.
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Old 05-01-2014, 04:57 PM
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Re: H23a VTEC Swap

If not mentioned...

Oil pump with new oil pickup (screen too)
Master gasket kit
Belts
Motor mounts(while youre in there)
ARP BOLTS EVERYWHERE

These will stop plenty of little annoyances down the road
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Old 05-01-2014, 10:28 PM
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Re: H23a VTEC Swap

Going with the h22 oil pickup and pan, but decided not to install the oil squirters though.

Last edited by chillhax; 05-11-2014 at 06:15 PM.
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Old 05-10-2014, 05:20 PM
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Icon7 Re: H23a VTEC Swap

Ran into a big issue with the auto tensioner on test startup.

ordered h22 KS tuned tensioner to resolve this **** up.

Hope to get this thing running by the end of the month.

Last edited by chillhax; 07-18-2014 at 03:50 PM.
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Old 07-06-2014, 07:37 PM
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Re: H23a VTEC Swap

I am thinking of doing the same swap in a 2001 prelude auto I am wondering since you have done the build , is there anything you got to change ? Engine harness oil pump etc ?
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Old 07-18-2014, 03:22 PM
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Re: H23a VTEC Swap

The swap was not too complicated but one thing i can't stress enough is taking your time to do everything right the first time around and not cheaping out on core parts for the motor. Also being careful with the removal of hoses, being extra careful disconnecting all electrical components so you don't break any plastic clips and overall just taking your time to have yourself a very reliable swap that will last you.

Things you need to swap from the h22 to the h23 (while engine is out)
- complete intake manifold
- oil pump and water pump (buy these new)
- oil pan and oil dipstick
- VTEC solenoid
- distributor
- crank position sensor
- crank gear
- driver side engine mounting bracket (need to swap this from the h22 so that the engine mounting bracket lines up with the driver side engine mount)
- timing covers

* It is mandatory to replace the oil pump from the h23 with one for the h22 since the h23 oil pump wont have the holes to bolt on the crank position sensor and will give check engine light errors if you don't install the crank position sensors.

Mandatory things that you should buy before starting
- KS Tuned H22 Timing Tensioner (Bolts right in the same place as the original Auto tensioner. Main reason to get this is because the auto tensioner will fail no matter what precautions you take, even if you get a new auto tensioner its just not worth it in the long run you will thank me later)
- New OEM Honda H22 oil pump and water pump from a trusted source (don't get aftermarket pumps. Get OEM Honda parts just for overall reliability and to avoid any problems in the long run)

Misc items
- New timing belt, balance belt, spark plugs & spark plug wires, Hondabond to seal oil pan and gaskets real good (just go new for overall reliability)
- essential liquids (5 qt of motor oil, antifreeze, power steering fluid, transmission fluid)
- Crankshaft holding tool and a breaker bar (you will need this to remove the crank gear bolt)
- 36mm axle nut socket to remove axle nuts

Optional
- New engine mounts (depending on the condition of the ones currently in your car. You can buy OEM mounts or for extra security get some Innovative engine mounts)
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Old 07-18-2014, 07:09 PM
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Re: H23a VTEC Swap

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Originally Posted by chillhax View Post
Decided on the H23 since there is an abundance of these engine in my area and there really wasn't any H22's to pick from that were in good shape. Got to pick out of several H23's and ended up getting the cleanest one out of the bunch.

In my area, there are quite a few H22's kicking around, but they are all priced higher than the 23. Aside from the affordability and performance of the 23, I noticed the general condition of them all. They were all pretty clean, both inside and out.

The thing to keep in mind about the H22, and H23 is the cars they came in. The 22, came predominantly in the Prelude, a sporty car that gets flogged. The 23 came from a station wagon - a car generally not raced or driven hard.

Same output, low revs, "mature/non-sporty" car and demographic = generally clean, well cared for engines. I'd take a used 2.3 over a used 2.2 all day.

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Old 07-18-2014, 07:54 PM
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Re: H23a VTEC Swap

That explains a lot. No wonder the H23's are in such great shape.
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Old 10-19-2014, 02:14 PM
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Re: H23a VTEC Swap

Just a random question but I finished installing a blue top h23 onto my 2000 prelude. Startz up fine all good to go drive like a dream. But I noticed that my oil light is om? (the red can lol). Any ideas? Oil level is full and light wasnt on before swap
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Old 10-19-2014, 04:44 PM
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Re: H23a VTEC Swap

Is it plugged up? Sensor could've gotten damaged in the installation.
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Old 10-23-2014, 06:35 AM
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Re: H23a VTEC Swap

can anybody suggest any good place where to buy engine (which DO OFFER international shipping because "your" hmotorsonline doesnt)?
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Old 10-23-2014, 11:24 AM
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Re: H23a VTEC Swap

I ordered my h23a from jdmtigerjapanese, pretty sure they do international shipping considering they are based in toronto canada and im based in ohio haha
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Old 10-24-2014, 10:02 AM
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Re: H23a VTEC Swap

and btw does preludes driveshafts fit straight h23a vtec?

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I ordered my h23a from jdmtigerjapanese, pretty sure they do international shipping considering they are based in toronto canada and im based in ohio haha
yeah I already asked prices from different companies but Im not sure which ones you can trust....
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Old 10-24-2014, 02:13 PM
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Re: H23a VTEC Swap

The engine doesn't decide which axles you are using, the transmission does. If you are using and H/F series transmission (unless you have an SH), then the prelude driveshafts will fit.
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Old 10-29-2014, 08:57 AM
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Re: H23a VTEC Swap

I replaced the headers and water pump too when I did mine. Might as well.
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Old 01-29-2015, 08:29 PM
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Re: H23a VTEC Swap

I also have done an h22 to h23 swap on my 2000 prelude and also the oil light is on now after swap... Same thing, oil level up, oil pressure and pump working. Any ideas? I purchased a brand new oil pressure sensor but still no go....
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