Cleaning VVT camshaft sprocket assembly after spun bearing

[demasrv]

Originally Posted by ETM_Shaman

Also make sure you haven't cross connected the VVT solenoid plugs (intake to exhaust). It's easy to do (everything seems "ok" and fits) and makes car run fine until VVT engages and all goes crazy. I have rebuilt FA20 with spun bearings and never had a damaged sprocket. Remember there's a super fine metal filter in the oil supply to each head.

Eduardo

What do you mean all crazy? Like the car dies? I'll double check the plugs. Is there a trick? I think the plugs were different colors but will check next time I'm out in my garage.

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[demasrv]

I ended up just cleaning out my OCVs and the codes went away. No rough idle either.

[DarkPira7e]

Good to hear! Glad everything worked out. The issue with my cam sprocket was that the bolts started backing out of the cam. Not a problem that had anything to do with cleaning them

[M0nk3y]

Originally Posted by turboencabulatr

Engine rebuild after spun bearing. New block and rebuilt heads.
Is it reasonably possible to clean out this assembly core piece with solvent and compressed air?

I don’t believe Subaru considers this item “serviceable” as there are no procedures for doing so in the service manual that I could find. Some passages have balls that appear to be pressed in and the plunger cannot be removed. Is there actually a way to disassemble this for rebuild that I’m failing to see?

Kind of bumping this up instead of a new thread since this is topical.

Do you, or anyone have a re-assembly guide for these sprockets? Took one apart to clean, and then during reassembly noticed the internal cut-aways were different on 1 side (the other 2 being the same) and didn't know how it needed to be oriented.

As well, another note.

Using a spare engine to rob some pieces from, noticed differences on my sprocket faceplate (2016) from the other (presumably 2017+?). Does anyone know if the plate covers are the only differences or if the internal chambering is different?

Mine (2016) - stock images:



Spare Sprocket, presummably 2017+

[NoHaveMSG]

Originally Posted by M0nk3y

Kind of bumping this up instead of a new thread since this is topical.



Do you, or anyone have a re-assembly guide for these sprockets? Took one apart to clean, and then during reassembly noticed the internal cut-aways were different on 1 side (the other 2 being the same) and didn't know how it needed to be oriented.

Not a guide but does this work? I knew @rice_classic had some pictures and video in his thread.



https://www.ft86club.com/forums/show...&postcount=247

Edit: oh and yes, the little cam reluctor is the only difference. When swapping 17’+ engine into older car, this is one of the things you have to change.

[M0nk3y]

Originally Posted by NoHaveMSG

Not a guide but does this work? I knew @rice_classic had some pictures and video in his thread.



https://www.ft86club.com/forums/show...&postcount=247

Edit: oh and yes, the little cam reluctor is the only difference. When swapping 17’+ engine into older car, this is one of the things you have to change.

I found a helpful video thanks to Dennis:

Good to know we can swap to 17+ with only changing the faceplates in front of the solenoids, that’s currently what’s done and on the car so glad I don’t need to re-swap back


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[Ultramaroon]

He glosses over the most important part. The actual spool valve in the center comes apart. That's where carbon accumulates and jams the plunger.

[chanklins]

Originally Posted by M0nk3y

I found a helpful video thanks to Dennis:

Good to know we can swap to 17+ with only changing the faceplates in front of the solenoids, that’s currently what’s done and on the car so glad I don’t need to re-swap back


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I have it all disassembled, and I’m interestwd in this since I have a set of 2017 sprockets that I’d like to convert to 2015. Can you tell me exactly which piece is the faceplate that needs to be swapped?

That’s my sprocket right now:

[Ultramaroon]

Arrow points to the reluctor plate. The spool valve in the circle can be disassembled. Look down inside with a light to see a removable inside circlip.