Everywhere you read when dealing with ls engines they'll say use only ac delco. Those ac delcos are as bad junk as any of the rest of em. The best way is what you just showed before you put em in. Another thing is get a 10mm 1.5 nut and put it on the threads and put it in a vice and set a tourqe wrench to 15ft. Lbs. And while in the vice tourqe it and see if the center spins inside the body of the sensor before the tourqe spec is met. If it does take it back or throw it in the trash can.

Can you test them with out taking them out?

Great video, thanks for the tip! PS: after some research it seems that it may not be a knockoff ACDelco but it seems the crystals inside these are quite fragile and break during shipping.

I have a 89 cavalier z24 replaced the knock sensor and it’s setting a code 43 (knock sensor code) its retarding my timing 30 percent?? Is my new sensor to sensitive?

I like your video I have the same problem I have yukon 2005 I buy it same knock sensor from Amazon do you do?