Q about knock sensor replacement
Thread Starter
Racer
Joined: Jan 2000
Posts: 422
Likes: 3
From: Palatine IL
Q about knock sensor replacement
Got the code for the rear knock sensor. Going to replace them. Anything go on the threads before I install them? FSM says 11 ft-lbs in the installation procedures and 15 ft-lbs under specifications. Recommendations? What's the TSB on this again?
Larry Moy
2000 Coupe
[Modified by YELLO C5, 7:36 PM 5/24/2004]
Larry Moy
2000 Coupe
[Modified by YELLO C5, 7:36 PM 5/24/2004]
Safety Car
Joined: Nov 1999
Posts: 3,891
Likes: 2
From: Houston, TX
Re: Q about knock sensor replacement (YELLO C5)
Have you replaced your intake any time recently? I have not seen many knock sensors go out on these cars. Most of the time it is when people put the LS6 intakes on without getting the new coolant pipes. Then the intake will crush the wires and cause a short. You can Ohm out your stock sensors to see if they are bad. They should come out to 1K Ohm resistance. You can check for an internal short as well by using AC current...
I cannot remember and I am not at the shop to check, but I believe that the knock sensors will come with a teflon paste on the threads already. Torque to 11 Ft/lbs.
Good luck,
I cannot remember and I am not at the shop to check, but I believe that the knock sensors will come with a teflon paste on the threads already. Torque to 11 Ft/lbs.
Good luck,
Thread Starter
Racer
Joined: Jan 2000
Posts: 422
Likes: 3
From: Palatine IL
Re: Q about knock sensor replacement (Chris@SpeedDemon)
I did change to the LS6 intake about 10 months ago but I also changed the coolant pipes. I'll ohm out the wiring and sensors as suggested. I was surprised the new sensors didn't come with any sealant on the threads. Any suggestions what I should use?
BTW, is there a special socket for the sensors?
BTW, is there a special socket for the sensors?
Le Mans Master
Joined: Oct 2000
Posts: 6,502
Likes: 717
From: Sausalito CA
Re: Q about knock sensor replacement (YELLO C5)
I have seen special sockets for sensors.
Although I have never removed my manifold to inspect this specific question.
The factory manual shows a drawing in which the sensor head is a standard looking hex head.
Let me add that a high failure item is the check value at the rear of the manifold. Might be a great opportunity to do some preventative maintenance on that hard to reach item.
Although I have never removed my manifold to inspect this specific question.
The factory manual shows a drawing in which the sensor head is a standard looking hex head.
Let me add that a high failure item is the check value at the rear of the manifold. Might be a great opportunity to do some preventative maintenance on that hard to reach item.
Safety Car
Joined: Nov 1999
Posts: 3,891
Likes: 2
From: Houston, TX
Re: Q about knock sensor replacement (YELLO C5)
I would use a teflon sealer on the threads. Check for any burns on the wiring harnass or shorts in the wiring.
There is no special sockets for these. Just use a 22mm or 7/8" deep socket.
Good luck,
There is no special sockets for these. Just use a 22mm or 7/8" deep socket.
Good luck,
