According to one post I read, but can't find now (with excellent instructions) it specifies 17.4 ft./lb. or 24 n-M. I was informed by an experienced mechanic that you should go a bit lower to start with since knock sensors are fairly sensitive to over-tightening and may render useless if stressed too hard. Say 3-4 ft./lb. less to start with.
This post recommends 16 ft./lbs.
http://www.lovehorsepower.com/SubaruDocs/subaru_legacy_knock_sensor.htm
Good luck
that the knock sensor does
the knock sensor in on the drivers side of the block toward the rear, and it's under the intake manifold.
on top of the engine under the air box
It is located on the engine block drivers side.
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?
That depends entirely on what happened to it to make it need repairing.
If somebody knocks on the front door of the Subaru, the KNOCK sensor, sets off the KNOCK Alarm....LOL
on top of the engine block under the intake manifold. it can be accessed without removing the manifold. easy fix!
The knock sensor is located near the idle air control solenoid valve on a 2001 Subaru Forester. The knock sensor is responsible for sensing vibrations caused by engine knock.
I found in a google search 15ftlbs torque for the knock sensor.
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.