Where is the Knock sensor located?

2008 CHEVROLET IMPALA
145,000 MILES • 3.8L • AUTOMATIC
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JERS76
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Do you have diagrams of the knock sensor locations?
Oct 30, 2024 at 10:09 AM
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STEVE W.
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  • ASE Certified Mechanic
https://www.2carpros.com/articles/how-a-knock-sensor-works
Oct 30, 2024 at 1:59 PM
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STEVE W.
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  • ASE Certified Mechanic
The knock sensors are on the engine block. The left one is just above the starter while the right side is under the converter and behind the oil filter. The left side isn't hard to get to, you just disconnect the electrical connector and unbolt it. When you tighten the new one down the bolt is torqued to 18 ft lb. The right side is worse, you need to unbolt the converter to get to the head of the bolt, then it's the same as the opposite side. You can get to both from under the car.
Oct 30, 2024 at 1:59 PM
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JERS76
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Thank you! I appreciate you! Have a great day!
Oct 30, 2024 at 3:42 PM
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STEVE W.
  • ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
You are welcome.
Oct 31, 2024 at 9:20 AM
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