Reinstall Knock Sensors
Thread Starter
Pro
Joined: Aug 2007
Posts: 668
Likes: 38
From: Austin TX
Reinstall Knock Sensors
92 LT1 with 145K. I am reinstalling my knock sensors after a coolant change. There is not any sealant left on the threads and am requesting information on the proper reinstallation.
Melting Slicks
Joined: May 2013
Posts: 2,692
Likes: 349
From: Sacramento California
Teflon tape will be effective in sealing in the coolant, but I have heard many other members state that teflon tape can also insulate the KS from the block and cause functionality issues.
Myself, I used a *very small amount* of copper anti-seize on the threads. The copper will actually enhance the connection for good KS function, and I have not had any leaks.
The torque is 14 ft-lb. Anti-seize lubricates the threads and less torque is required, maybe 10% less ??? I'm not sure exactly. I applied 13 ft-lb because of the small bit of anti-seize. Just be careful.
Myself, I used a *very small amount* of copper anti-seize on the threads. The copper will actually enhance the connection for good KS function, and I have not had any leaks.
The torque is 14 ft-lb. Anti-seize lubricates the threads and less torque is required, maybe 10% less ??? I'm not sure exactly. I applied 13 ft-lb because of the small bit of anti-seize. Just be careful.
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
If this is response to my thread, notice I did say "liquid teflon pipe seal". It comes out of a tube. I use it for all my sensors.
Melting Slicks
Joined: May 2013
Posts: 2,692
Likes: 349
From: Sacramento California
Oil Producer
Joined: Apr 2014
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Le Mans Master
Joined: Aug 2007
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From: WV
If you get "sensor safe" sealant you won't have any problems with the sensor not grounding , this sealant is made for sensors.. You also have to torque the sensor correctly, if you don't " torque to spec" you can get false readings that will pull timing when it doesn't need to be pulled...I had this problem when I over torqued my knock sensor years ago...WW
Melting Slicks
Joined: Feb 2003
Posts: 2,677
Likes: 812
From: Saskatoon Sask.
If you get "sensor safe" sealant you won't have any problems with the sensor not grounding , this sealant is made for sensors.. You also have to torque the sensor correctly, if you don't " torque to spec" you can get false readings that will pull timing when it doesn't need to be pulled...I had this problem when I over torqued my knock sensor years ago...WW
