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Old 08-22-2007, 06:40 AM   #10
LiquidForce
Scooby Specialist
 
Member#: 12811
Join Date: Nov 2001
Chapter/Region: South East
Location: Roswell Ga
Vehicle:
2002 2.5l Wrx
517whp/516wtq (Stage pi)

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With a new stock block I wouldn't expect any piston slap when the motor is cold. I also wouldn't think it would be rod knock unless you didn't crank the motor over for a while before starting it to get oil through the system. Even if you didn't the motor is put together with assembly lube that should buy it the second or two it takes the oil pressure to come up.

Have you checked for exhaust leaks around the #2 and #4 manifold?
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