Looking at the top of the motor remove the air intake and it is below the butterfly on the drivers side top end of the motor.
It is located on the engine block drivers side.
that the knock sensor does
That depends entirely on what happened to it to make it need repairing.
On a 1999 Subaru Legacy Outback, the knock sensor is typically located on the engine block, near the intake manifold. It is usually found on the driver's side, towards the back of the engine, and can be accessed by removing some components for better visibility. The sensor is a small, cylindrical device screwed into the engine, designed to detect engine vibrations and adjust timing accordingly.
the knock sensor in on the drivers side of the block toward the rear, and it's under the intake manifold.
Its on top of the engine by the fuel injection (remove the air intake first). Need a 10mm socket with a long extention.
In a 1998 Subaru Legacy, the knock sensor is located on the top of the engine block and to the left of the engine. More specifically, it is under the left rear intake manifold runner.
on top of the engine under the air box
You can find the knock sensor on the top side of the engine under the intake manifold. It is easiest to find from the driver's side and is at the back of the engine block.
Where is the knock sensor located on a 1999 Subaru Forester?
It is threaded into the block, under the intake manifold.
The torque specification for the knock sensor on a 1997 Subaru Legacy is typically around 8.5 ft-lbs (or 10 Nm). It's important to ensure that the sensor is tightened to the appropriate torque to avoid damage to the sensor or the engine block. Always refer to the vehicle's service manual for the most accurate and specific information.