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Old 04-26-2006, 08:40 PM   #1
coolcougar
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Default JDM AVCS solenoid vs. USDM AVCS solenoid

Hello,

I have a question about AVCS solenoids (a.k.a. oil control valve): Is the solenoid on the USDM 2.5 Sti engine the same one that was/is used on the JDM 2.0 engines? I ask because I bought an engine with a set of V7 JDM heads with AVCS however during shipping one of the ACVS solenoids was struck and broke. The part number listed on the solenoid is 10921AA002 and below that is the number 0260. However this part number brings up weird results when entered into US parts query.. it has a list price of ~$10,000 Anyway I'm having a tough time tracking down a replacement AVCS solenoid and I was wondering if a USDM one would work?

Any help would be greatly appreciated.

Thanks,

Ken

Edit: To stick with Subaru's naming convention I should call it an "oil control valve" instead of a AVCS solenoid. Hopefully that will help clear up any confusion.

Update!
Good news! A Subaru parts man was able to track me down an AVCS solenoid PN 10921AA020. It fit! True, the bracket was a little different and the connector came off at a different angle... but all the important stuff was the same as the JDM AVCS solenoid that I was replacing e.g. the length and diameter of the solenoid and the connector was the same as well.

So the long and short of it is this:
Functonally (not astetically) JDM PN 10921AA002 = USDM PN 10921AA020

BTW the part cost ~$105
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Last edited by coolcougar; 06-01-2006 at 10:31 AM. Reason: Clarification
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Old 04-27-2006, 01:26 AM   #2
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US one would not work. JDM and USDM have different avcs sensors. I forgot which one, but the US or JDM one has a bigger bore than the other. If you use the corresponding market's avcs, you need to use the corresponding cams and ecu.
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Old 04-27-2006, 07:32 PM   #3
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The JDM and USDM2.5 AVCS solenoids are not interchangeable
They also have a different electrical plug

The JDM AVCS sensors (and camshaft sensor pickup) are also very different and are not compatible with the USDM2.5 STi engine wiring harness and ECU, just be aware of this too.
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Old 04-27-2006, 09:33 PM   #4
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I would call whoever sold the motor to you.
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Old 04-28-2006, 08:13 AM   #5
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Quote:
Originally Posted by dexterous
I would call whoever sold the motor to you.
I bought the engine in a private sell.


Thanks for all the good information guys. If anyone hears about a JDM AVCS head that gets damaged beyond repair and has a AVCS solenoid that I can salvage I'd appreciate it.

Ken
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Old 04-28-2006, 08:32 AM   #6
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I thought Gruppe-S had a conversion plug to go from one to the other. Am I mistaken?
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Old 04-28-2006, 08:34 AM   #7
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try iaperformance
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Old 04-28-2006, 01:49 PM   #8
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call adrian at boxer4motorsports he can probably hook you up..
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Old 04-28-2006, 03:09 PM   #9
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Quote:
Originally Posted by coolcougar
However this part number brings up weird results when entered into US parts query.. it has a list price of ~$10,000
maybe it was 10000 yen, which is like a 100 bucks. Might wanna check into it more.
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Old 04-28-2006, 03:11 PM   #10
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I am. A subaru parts shop thinks that they found one for me but base on previous comments I'm not too optimistic about it being the correct fit.
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Old 04-29-2006, 06:27 PM   #11
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What about differences between the AVCS sensors?? JDM same as USDM????
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Old 04-30-2006, 03:53 AM   #12
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Quote:
Originally Posted by Peeblesmx445
What about differences between the AVCS sensors?? JDM same as USDM????
cam pick ups? No, they are different. If you want you want to use jdm heads but do not have the avcs cam pick ups, you can probably retrofit the USDM pickups and use the USDM cams to allow avcs
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Old 05-07-2006, 10:26 PM   #13
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Good news! A Subaru parts man was able to track me down an AVCS solenoid PN 10921AA020. It fit! True, the bracket was a little different and the connector came off at a different angle... but all the important stuff was the same as the JDM AVCS solenoid that I was replacing e.g. the length and diameter of the solenoid and the connector was the same as well.

So the long and short of it is this:
Functonally (not astetically) JDM PN 10921AA002 = USDM PN 10921AA020

BTW the part cost ~$105
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Old 05-07-2006, 10:32 PM   #14
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Quote:
Originally Posted by super-ru
maybe it was 10000 yen, which is like a 100 bucks. Might wanna check into it more.

No, Subaru does that when there is a part in the system tnat they do not want us to order.

The actual price is $9999.99 (only goes up that high).

The black two pots are listed the same way.
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Old 05-09-2006, 01:20 PM   #15
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To stick with Subaru's naming convention I should call it an "oil control valve" instead of a AVCS solenoid. Hopefully that will help clear up any confusion. I edited my OP to reflect this.
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Old 05-09-2006, 04:16 PM   #16
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Quote:
Originally Posted by hondaslayer
No, Subaru does that when there is a part in the system tnat they do not want us to order.

The actual price is $9999.99 (only goes up that high).

The black two pots are listed the same way.
Interesting, never heard of that, we should pony up the money and see what they say if we actually tried to order one.
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Old 02-19-2007, 11:29 AM   #17
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So there was some conflicting info here... Some said the solenoids are functionally the same with the only difference being plug location and bracket while others say they are incompatible.

We all know the cam position sensors are incompatible, how about the USDM vs. JDM AVCS solenoids?

Thanks,
Russ
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Old 02-19-2007, 06:49 PM   #18
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The actual JDM AVCS solenoids and USDM are physically slightly different
that is you will not fit a USDM solenoid into the location on the JDM head

Electrically the solenoid is the same with a different electrical plug
that is you can have a USDM 2.5 ecu drive a JDM AVCS solenoid
simply swap the USDM AVCS plug to JDM... this can be done in a few minutes

It is the "Hall Effect" camshaft position sensors which are totally incompatible
different sensors and slightly different location
as with anything it can be overcome with some modifications...
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Old 02-19-2007, 07:58 PM   #19
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I tried fitting the USDM solenoids into the V7 head... they seemed to slide in fine, with the only issue being that the USDM bracket was too tall for the cast aluminum arm on the head that the bracket is screwed into.
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Old 02-19-2007, 10:33 PM   #20
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Quote:
Originally Posted by WaXeD
The actual JDM AVCS solenoids and USDM are physically slightly different that is you will not fit a USDM solenoid into the location on the JDM head
This wasn't true in my case. Yes they are physically different but the differences are cosmetic not fuctional. I wont make an all inclusive statement that all USDM AVCS soleniods will work with all JDM AVCS heads but this much I know:

USDM AVCS solenoid PN 10921AA020 will fit and function in JDM V7 heads.

As for all other possible solenoid head combinations, cam sensors, and what not...


Quote:
Originally Posted by rlavalle View Post
I tried fitting the USDM solenoids into the V7 head... they seemed to slide in fine, with the only issue being that the USDM bracket was too tall for the cast aluminum arm on the head that the bracket is screwed into.
I have using a USDM solenoid in my V7 JDM heads with no problem for almost a year. Like rlavalle said the bracket is a taller but nothing a longer bolt couldn't take care of. The plugs were the same as well the only difference being the angle that the plug comes off the solenoid. Plugged right in. My Tuner had no problem tuning my car with this solenoid.
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Old 02-20-2007, 12:25 AM   #21
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Sorry for any confusion created

I have a USDM EJ257 and the JDM AVCS solenoids in my case would not fit into the USDM head
I didn't try them the other way around though.... USDM solenoid into JDM head
In my case I am using the USDM head and using JDM AVCS pickups

It was easy enough to change the electrical plug on the solenoids over though and just keep the stock solenoids in place
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Old 04-27-2011, 12:01 AM   #22
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yeah, I'm bumping another USDM JDM avcs thread. So...

solenoids: USMD will fit in JDM heads

Cams, covers and cam gears; we know fit too.

Issue is physically fitting the cams sensors in (neglecting the difference in signals)...can anyone varify? I'm also suspect if the cam triggers are at the same degree points on the cam and that the cam is in the same relative position in the head.

Can anyone verify? I've made several calls today and have been hunting this down with lots of 'I don't know's', 'never tested it' or 'what's an oscilloscope?'

Trying to get answers before I dive into using JDM parts on a USDM head as a 'budget' AVCS swap for 02-05 WRXs
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Old 04-27-2011, 12:39 AM   #23
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actual position of the camshaft position sensors is slightly different
so it wil not line up exactly with the pickup grooves in the camshaft

I overcame this by cutting and rewelding te sensor lobes on the cams to line up with the sensor position

also the sensor location bolt alignment is not quite the same
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Old 04-27-2011, 07:16 AM   #24
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so you resolved the issue with the sensor location by cutting/welding the timing marks on the cam?

Do you have any pictures of the alignment issues or did you actually measure it?

From what I can see in pics, the USDM sensor location looks on slight angle in regards to the cylinder bore and the JDM looks more flat (like 90* perpendicular to the bore)...

Guess I need to step up and fork out the money for EJ207 heads and try to measure it all up. I'm wondering how different the cam sensor locations are and how much their mounting position is rotated in comparison (changing timing seen at the cam sensor).
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Old 04-28-2011, 02:12 AM   #25
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I had USDM EJ257 and converted the cams to work with my Australian deliverd STi (which use the same setup /ECU as JDM)

I tried to simply fit the AU ("JDM" type) cams into the USDM heads but
sensor postion didn't line up (from memory one head was more off alignment than the other, this waqs more a forward/backward position problem)

My solution, I cut the "JDM" style sensors lobes off my cams (made an alignment tool first) then cut the USDM cam ends off and welded the "JDM" lobes on, with the same original cam alignment

You are of course trying the conversion the other way round...
Also Note. the USDM 2.5L cams are hollow and JDM are solid



My opinion it would be better to buy aftermarket USDM 2.5L cams which are just as good if not better than the JDM STi cams , and they will drop straight in and work with your existing sensors and ecu....

IMO the biggest issue with the 2.5L head is the intake ports are to small...
longer duration cams will help but at the end of the day I think the small ports are holding back the engine high rpm performance
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