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Old 06-23-2013, 03:35 PM   #1
erok81
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Default Correct AVCS Delete Method

I have an '04 Wagon that I bought with an already swapped EJ257. I was chasing a low oil pressure issue that lead to a rebuild. I want to make sure I do the build right so I don't destroy another engine.

Everything has been checked and now I am my final things. The AVCS system was disconnected when they did the swap. Cam oiling hole were blocked off, I'm pretty sure new cam gears swapped (I'll have to check that), but I noticed they completely removed the AVCS solenoids from the housings.

I have no idea the tolerances inside that housing (I looked in the FSM but didn't see anything) but I would imagine filling a big hole instead of small oil clearances might make a difference.

All of the swaps I've read about don't say anything about removing them. Only the blocking of the cams and the correct cam gears. I think down the road I'll might swap in the AVCS but I have to recover from this latest engine build first.
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Old 06-23-2013, 03:55 PM   #2
banshee04
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You cant get rid of the AVCS solenoids because that's where the cams get the oil from. There isn't a oiling hole drilled into the head, just the AVCS Solenoid/Girdle. You can disconnect the plug from the solenoids, but you still have to have the oil lines hooked up.

You would also need 2.0 WRX Intake Cam gears with the 2.0 cam seals.

You will still have to run cams with the trigger marks on the back of the intake cams for the cam sensors.
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Old 06-23-2013, 03:59 PM   #3
erok81
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I'm pretty sure the cam gears were swapped. The oil lines and everything are there, but there is nothing where the solenoids would go - just an empty cavity with a plug sealing the hole where I assume the wiring would normally come out of.
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Old 06-23-2013, 04:03 PM   #4
banshee04
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Quote:
Originally Posted by erok81 View Post
I'm pretty sure the cam gears were swapped. The oil lines and everything are there, but there is nothing where the solenoids would go - just an empty cavity with a plug sealing the hole where I assume the wiring would normally come out of.
That hole is where the AVCS Solenoid goes. As long as the lines are still hooked up to the housings, then your good to go.
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Old 06-23-2013, 04:07 PM   #5
erok81
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Here are a couple of pictures. Getting one inside the hole was tough, but you can see there is nothing in there.




So it sounds like this isn't the correct way to disable the AVCS? The cams were still getting some oil. I ran it this way for ~50k miles. In that 50k I blew a turbo in two weeks (swapped in a bigger one) that was fed from this housing. Maybe that's part of the reason my turbo went so fast.
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Old 06-23-2013, 04:13 PM   #6
banshee04
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Deleting the solenoids are just fine as long a the oil hardlines are still attached to the top of the AVCS Housings.
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Old 06-23-2013, 04:24 PM   #7
erok81
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Yeah the oil lines are still there.

I was hoping they needed to be there. That means I still have no idea what caused my low oil pressure and blown turbo issue.
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Old 06-23-2013, 04:33 PM   #8
banshee04
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Do you still have the AVCS filter? If so, throw them in the trash.
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Old 06-23-2013, 04:34 PM   #9
erok81
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Nope. That was probably the second thing I did.

I'm hoping the issue was just a crappy build on the shortblock
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Old 06-23-2013, 10:49 PM   #10
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Maybe I'll throw some solenoids in there just incase. Seems like a lot of additional volume to fill without those being there. Depending on how tight they fit I guess.
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Old 02-21-2015, 12:18 PM   #11
midnightlamp
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Just in case anyone sees this and trys the same thing, this is NOT the correct way to delete the AVCS system. The front cam girdle with the AVCS solenoid has release lines so that oil going into the cam gear has a source to return and drain. You'll see this as two holes on the girdle, leaving it. When you just plug the solenoid hole all your oil pressure is just being dumped out of those two holes.
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Old 10-13-2020, 02:50 AM   #12
DAVIS5267
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Default avcs solenoid delete?

I know this is an old thread but,....I am in the process of swapping a ej255 into my 05 wrx. I plan on using the heads that came on the motor. In an effort to get he engine bay as clean as possible, I would really like to get ride of the AVCS solenoids. There must be a way to do it with out the solenoid itself.

Could I plug the oil passage so that it will maintain oil pressure in the cavity that the solenoid would be mounted in and still keep cam journal fed?
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