Knock Sensor TSB?
Thread Starter
Teching In
Joined: Dec 2001
Posts: 37
Likes: 0
From: Toronto
Knock Sensor TSB? I was told that GM issued a TSB for LS1 knock sensors.
"There was a TSB issued for the knock sensors on LS1's about contamination getting down into the bores that they are located in the intake valley cover. The bullitin
mentioned something about using silicone to create a dam around the holes"
Does anybody have any more information regarding this TSB? i had my knock sensors replaced last year and am now getting an engine code again saying they are faulty. thanks
"There was a TSB issued for the knock sensors on LS1's about contamination getting down into the bores that they are located in the intake valley cover. The bullitin
mentioned something about using silicone to create a dam around the holes"
Does anybody have any more information regarding this TSB? i had my knock sensors replaced last year and am now getting an engine code again saying they are faulty. thanks
Staging Lane
Joined: Feb 2002
Posts: 69
Likes: 0
From: Norfolk VA
Re: Knock Sensor TSB? Found this. Looks like a little RTV seals it up.
Subject: Audible Spark Knock (detonation) TSB #02-06-04-023
(not only the LS1, but also 99-2002 Pickups and utility models with 4.8, 5.3, and 6.0L motors)
Condition: mild to severe engine ping (spark knock). worse on acceleration.
Cause: corrosion of the rear bank knock sensor due to water intrusion into the sensor cavity
(another reason for not squirting your motor down with a hose like some think its ok to do) In
fact, the bulletin mentions "this condition is more apparent on vehicles in which customers
frequently wash the engine compartment".
Correction: replace rear bank knock sensor and build a "dam" around the sensor using RTV to divert
water away from the sensor. (swell........ make a "puddy dam".... that's high tech eh?_"
part no. for the sensor is 10456603
Subject: Audible Spark Knock (detonation) TSB #02-06-04-023
(not only the LS1, but also 99-2002 Pickups and utility models with 4.8, 5.3, and 6.0L motors)
Condition: mild to severe engine ping (spark knock). worse on acceleration.
Cause: corrosion of the rear bank knock sensor due to water intrusion into the sensor cavity
(another reason for not squirting your motor down with a hose like some think its ok to do) In
fact, the bulletin mentions "this condition is more apparent on vehicles in which customers
frequently wash the engine compartment".
Correction: replace rear bank knock sensor and build a "dam" around the sensor using RTV to divert
water away from the sensor. (swell........ make a "puddy dam".... that's high tech eh?_"
part no. for the sensor is 10456603
