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Power steering pizzump

 
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Old 08-10-2009, 01:30 PM
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Power steering pizzump

Aight peoples. I did a quick search for this info and couldn't find it anywhere. I'm looking for someone who may have done this before and can tell me for a fact whether it works or not.

Are 4th gen and 5th gen power steering pumps easily interchangeable? If I buy a 4th gen H22 power steering pump, can I readily install it onto a 5th gen H22 without modifying any bolts/belts/etc...
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Old 08-11-2009, 12:28 AM
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Re: Power steering pizzump

yes, your good
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Old 08-11-2009, 02:09 PM
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Re: Power steering pizzump

Are you sure of this? Have you done it yourself? The only reason I ask is that on every single website I've searched they have completely different part numbers listed for 96 Prelude VTEC's and 97 Preludes... I haven't found a single place where they are listed as interchangeable.

Do you know this from experience? Or are you just assuming that they are both H22s so they both fit. I'm just trying to make sure that the mounting bolt holes/etc... all line up and I don't waste my money.
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Old 08-12-2009, 01:07 AM
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Re: Power steering pizzump

there is no BIG difference between the h22a1 and h22a4, just a little horse power difference that all.
it will fit
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Old 08-12-2009, 01:20 PM
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Re: Power steering pizzump

I'm bumping this because I finally came across the info I was looking for on PO.
Thread is here
http://www.preludeonline.com/f61/power-steering-226468/

4th Gen and 5th Gen power steering pumps are NOT interchangeable.

I also read a few little pieces about how they actually operate differently. 4th Gen power steering pumps adjust the amount of power steering boost according to overall speed as read by VSS. 5th Gen pumps adjust the amount of boost according to engine RPM and not the VSS.

Last edited by BadMofo; 08-12-2009 at 01:29 PM.
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Old 08-12-2009, 02:10 PM
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Re: Power steering pizzump

you have a h22, any pump from a h22 will work,
that thread is talking about h23, not h22
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Old 08-12-2009, 02:58 PM
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Re: Power steering pizzump

Nah, you misunderstood. That thread is talking about 4th gen compared to 5th gen, in general. The last guy was just saying that if you have an H22 you want a pump from an H22, and same for the H23 (which he was wrong about).


Here is the proof for you:
In the 4th gen years, the power steering pump is interchangeable between all the different models and engines.


There you can see that the same one A-1 Cardone part number services the H22A1, as well as the 96 Prelude SI (H23).


Here you can see that the same applies for the 5th gen ludes:


The same (re)manufacturer (A-1 Cardone) uses one part number to service all models of 5th gen ludes.



Now, compare the 2 part numbers. They are completely different.



Also, take note that in that thread someone pointed out that one is reverse threaded and one is regular threaded. So if you have one part number that follows all the 4th gens, and one part number that follows all the 5th gens, and one is reverse threaded, and one is regular threaded, common sense dictates that they are not interchangeable.


Also, take a look at these pictures I found online.

4th gen:





5th gen:


You'll notice that the the way they mount is definitely (slightly) different between the two.

The same applies with genuine honda parts:
4th gen:


5th gen:




You can again see that they look a little different, especially in the way they mount, and the inlet is also different.



I'll admit that the bolt pattern and hole for the pressurized hose looks pretty damn similar (from what little can be seen in those pictures), but that's not worth it to me if the mounting is going to need to be customized, and furthermore I don't want to waste 50-70 dollars on a used power steering pump, only to find out it doesn't fit.

Last edited by BadMofo; 08-12-2009 at 03:07 PM.
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Old 08-12-2009, 03:08 PM
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Re: Power steering pizzump

Good info man.
I woulda bet money that the two COULD be interchanged even if they looked slightly different. I need to find a place in the resource guide for this.
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Old 08-12-2009, 03:17 PM
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Re: Power steering pizzump

I mean, let's put it this way... I'm sure that they can be used interchangeably... they both do the same thing in theory (pump fluid lol).

edit: Maybe not though... now that i'm looking at it again, the outlet hole for the high pressure line looks much bigger on the 5th than it does on the 4th.

I just don't think it is a simple drop in operation.

The mounts look slightly different, the inlet looks slightly different, and I would think that if it is true that the 4th gen ones operate based off of the VSS, and the 5th gen ones operate off of RPM, then they might not play well with eachother.

I am just gonna play it safe and buy a 5th gen power steering pump for my 5th gen prelude... Can't hurt, right?

Who am I to stop anyone that wants to be adventurous =P. I am just not feeling adventurous myself lately =).


One last edit:

I also just noticed that on the 4th gen, Part number 8 is some kind of power steering pump sensor (perhaps the sensor that everyone is saying polls the VSS for vehicle speed). There is no corresponding part of any sort on the 5th gen...

Part number 8 on the 4th gen is listed as:
56500-PT3-902
SENSOR ASSY., POWER STEERING No Color

Ok, one last edit... I promise this time.


Here's some more evidence that the 4th gen pump has something to do with the 4th gen VSS, and the 5th gen pump has nothing to do with the 5th gen VSS.


Here is the 4th gen VSS:



Look familiar?? It is definitely the same part that is listed as number 8 up there on the 4th gen Power steering pump part diagram.



Here is the 5th gen VSS:



Definitely much less complex, and no hoses for power steering fluid.

Last edited by BadMofo; 08-12-2009 at 03:34 PM.
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Old 08-12-2009, 03:33 PM
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Re: Power steering pizzump

i couldn't see why Honda would change the P/S pump from the 4th Gen h22a1 preludes and make something totally different for the 5th gen h22a4,
.............then again they have done some stupid **** before lol

Good info
rep up
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Old 05-02-2016, 04:54 PM
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Re: Power steering pizzump

So guys, I'm bumping an old thread but I have a related issue.

I've got the VSS thats working with no problem. the question is theres 2 lines an inlet and an return line going to the steering rack. The two are not the same diameter. One of them on mine is broken/cut. Honda doesn't sell a replacment line... anyone know if I could use bulk hoses from Autozone? I've read someone say that on the 4th gen the shape of the hose makes it possible for it to kink and crack resulting in the loss of fluid to the rack.

Anyone have any suggestions?
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