What are those knock sensors for?
02-27-2005, 11:09 AM
#1
Former Vendor
Thread Starter
Member Since: Feb 2002
Location: DFW, TX www.vettestripes.com
Posts: 7,812
Likes: 0
Received 2 Likes
on
2 Posts
St. Jude Donor '03-'04-'05-'06-'07-'08
What are those knock sensors for?
Hi,
I just pulled my 2 knock sensors and 1 in great condition and another looks like a battery terminal got corrosion.
Should I replace it? Does anyone know how much for 1?
Thanks,
-Mike
I just pulled my 2 knock sensors and 1 in great condition and another looks like a battery terminal got corrosion.
Should I replace it? Does anyone know how much for 1?
Thanks,
-Mike
02-27-2005, 02:07 PM
#3
Former Vendor
Thread Starter
Member Since: Feb 2002
Location: DFW, TX www.vettestripes.com
Posts: 7,812
Likes: 0
Received 2 Likes
on
2 Posts
St. Jude Donor '03-'04-'05-'06-'07-'08
No, they are not O2 sensors.
They are knock sensors in the valley cover underneath of your intake manifold (check attached picture).
I am converting my LS1 PCV system to LS6 PCV system while upgrade to stage 3 heads.
-Mike
They are knock sensors in the valley cover underneath of your intake manifold (check attached picture).
I am converting my LS1 PCV system to LS6 PCV system while upgrade to stage 3 heads.
-Mike
Originally Posted by debmwb
Do you mean O2 sensors? Why did you pull them?
02-27-2005, 02:17 PM
#4
Supporting Vendor
Member Since: Jul 2003
Location: http://www.mphparts.com 800-364-1975
Posts: 6,486
Likes: 0
Received 2 Likes
on
1 Post
I am not sure how much they cost -- but if you have doubts about one or both of them, I would definitely replace them.
The knock sensors are there to save your motor from destroying itself. This is ULTRA important for modified cars that may be more prone to seeing knock, but it's also very important for even completely bone stock cars.
Over time, you get carbon build-up on your pistons which leads to increased compression ratio... which means that your motor is more prone to knocking. Depending on the severity of the knocking/pre-detonation, you could destroy your motor.
Don't get me wrong -- you could easily skate by over the next few years and never get any knocking and never have a problem with two broken knock sensors, but you never know...
The knock sensors are there to save your motor from destroying itself. This is ULTRA important for modified cars that may be more prone to seeing knock, but it's also very important for even completely bone stock cars.
Over time, you get carbon build-up on your pistons which leads to increased compression ratio... which means that your motor is more prone to knocking. Depending on the severity of the knocking/pre-detonation, you could destroy your motor.
Don't get me wrong -- you could easily skate by over the next few years and never get any knocking and never have a problem with two broken knock sensors, but you never know...
02-28-2005, 06:59 PM
#6
Burning Brakes
Member Since: Nov 2004
Location: Fort Worth Texas
Posts: 1,028
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by diynoob
I am not sure how much they cost -- but if you have doubts about one or both of them, I would definitely replace them.
The knock sensors are there to save your motor from destroying itself. This is ULTRA important for modified cars that may be more prone to seeing knock, but it's also very important for even completely bone stock cars.
Over time, you get carbon build-up on your pistons which leads to increased compression ratio... which means that your motor is more prone to knocking. Depending on the severity of the knocking/pre-detonation, you could destroy your motor.
Don't get me wrong -- you could easily skate by over the next few years and never get any knocking and never have a problem with two broken knock sensors, but you never know...
The knock sensors are there to save your motor from destroying itself. This is ULTRA important for modified cars that may be more prone to seeing knock, but it's also very important for even completely bone stock cars.
Over time, you get carbon build-up on your pistons which leads to increased compression ratio... which means that your motor is more prone to knocking. Depending on the severity of the knocking/pre-detonation, you could destroy your motor.
Don't get me wrong -- you could easily skate by over the next few years and never get any knocking and never have a problem with two broken knock sensors, but you never know...
02-28-2005, 07:21 PM
#7
Drifting
Mike.. Check your DIC for any codes. If you are or were having problems with the knock sensors you would have set
P0325, P0327, P0332. If those codes were not set I would just clean up the terminals.
P0325, P0327, P0332. If those codes were not set I would just clean up the terminals.
02-28-2005, 09:05 PM
#8
Former Vendor
Thread Starter
Member Since: Feb 2002
Location: DFW, TX www.vettestripes.com
Posts: 7,812
Likes: 0
Received 2 Likes
on
2 Posts
St. Jude Donor '03-'04-'05-'06-'07-'08
Originally Posted by Dugmole
Mike.. Check your DIC for any codes. If you are or were having problems with the knock sensors you would have set
P0325, P0327, P0332. If those codes were not set I would just clean up the terminals.
P0325, P0327, P0332. If those codes were not set I would just clean up the terminals.
-Mike
***BTW, I cannot check them now since I have pulled all the power cables. I will check them up after putting the headers and heads back.
I am very much sure that I have never seen these codes on mine.
03-02-2005, 08:58 PM
#9
Intermediate
Member Since: Feb 2005
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
To clarify knock sensor operation, as answered above, they are there to eliminate spark knock. This is done by removing or adding timing as needed. This is even more critical with forced induction and tuning.
03-03-2005, 06:41 AM
#10
Racer
Member Since: Mar 1999
Location: Pennsville, NJ
Posts: 413
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by We Make'm Faster
To clarify knock sensor operation, as answered above, they are there to eliminate spark knock. This is done by removing or adding timing as needed. This is even more critical with forced induction and tuning.
Also, if you haven't done so, make sure you cover EVERYTHING, when cutting that little oil boss in you lifter valley for your new LS6 vally cover, very, very messy.
