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Old 05-28-2006, 12:10 PM   #1
nabiljamali
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Join Date: Dec 2005
Chapter/Region: MWSOC
Location: sumware speshul
Default assembly specs for an ej257

does anyone know where i can find this?

specifically i am looking for piston and cam orientation when installing my heads
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Old 05-28-2006, 02:17 PM   #2
LiquidForce
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Chapter/Region: South East
Location: Roswell Ga
Vehicle:
2002 2.5l Wrx
517whp/516wtq (Stage pi)

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This is for the WRX 2.0 heads but I would think the process is similar for the 2.5 heads.

The key is to rotate the cams the right way when putting the timing belt on in order to avoid valve to valve interference.

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Old 05-29-2006, 12:19 AM   #3
nabiljamali
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can anyone confirm this?
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Old 05-29-2006, 12:21 AM   #4
gpatmac
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psm

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Confirm the factory service manual?

I followed the fsm and my car runs as it's supposed to.

...and to reiterate:
Quote:
Originally Posted by LiquidForce
The key is to rotate the cams the right way when putting the timing belt on in order to avoid valve to valve interference.
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Old 05-29-2006, 12:45 AM   #5
flycaster
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Quote:
Originally Posted by gpatmac
Confirm the factory service manual?
What I think he is concerned about is the manual you're both referring to is for a different engine. To wit: "This is for the WRX 2.0 heads but I would think the process is similar for the 2.5 heads."

If you can confirm that it is exactly the same as the diagram and directions for his motor (which uses AVCS camshafts), then his problem is solved.
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Old 05-29-2006, 01:27 AM   #6
gpatmac
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Looks purty much the same to me.
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Old 06-03-2006, 04:33 PM   #7
nabiljamali
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do i set the motor at #1 tdc when bolting the heads on as well?
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Old 06-11-2006, 01:22 PM   #8
blacktalon606
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NO! There is a timing mark to set your timing belt by... and then there is an arrow for TDC. You don't want to set it to TDC when putting the heads on. If you do, and you spin your cams the valves will hit the pistons. Set the mark on the timing belt sprocket (on the crank) that looks like - to the timing mark right above it. Set the single - mark on your top cam sprocket to the timing marks strait up.(which is a pain in the ass... one side the cam has no tension on it but the other side is close to the lobe peak and it wont' stay on the timing mark by itself) Set the single - mark on your bottom cam sprocket to the timing mark 90% off the top cam sprocket. (left side of the motor... its 90 to the left... right side its 90 to the right) Now if you have everything put together right, the double tick marks = on the bottom of your top cam sprocket and the top of your bottom cam sprocket will line up to point perfectly in line with eachother.
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