Knock Sensors

[My00Z28]

So after cleaning my engine(which is almost everyone's start to the problem) I messed up my front KS. I started throwing P0327(GREAT), so I got a project ahead of me! Here is my list of stuff I think I need if anything else is required or recommended please let me know.

Intake gaskets
2 new KS
2 new KS pigtails
RTV(building a dam)
inch lbs torque wrench

[KMdef9]

There's some good reading here.

http://www.ls1.com/forums/showthread...t=knock+sensor

I might also suggest the mod being discussed in that thread since your already there.

[My00Z28]

There's some good reading here.

http://www.ls1.com/forums/showthread...t=knock+sensor

I might also suggest the mod being discussed in that thread since your already there.

are you talking about the ls6 VC?... i would like to, but i have to have this done tomorrow because its my only ride and i dont want to drive it like this real long. there are so many things i would like to do at the same time just money and time is a problem!

[KMdef9]

Yup, the LS6 valley.

I haven't done this myself yet, I just know it's the thread I'd use b/c visual aids are the next best thing to having someone with you.

there are so many things i would like to do at the same time just money and time is a problem!

We all can relate to that! I should be hooking up my shift/launch light, but I'm sanding/painting walls and doors in the house.

[My00Z28]

lol yup ill be doing this on my own(by my self)! yay... im not worried about it just taking intake manifolds off of any car is not fun!

[KMdef9]

lol yup ill be doing this on my own(by my self)! yay... im not worried about it just taking intake manifolds off of any car is not fun!

It's another reason I like having a laptop, it's been my assistant on several auto projects.

[My00Z28]

does any one have a picture of building a dam around the knock sensor? i think i know what to do just want to make sure im correct!

[SMWS6TA]

all you have to do is make a circle about an 1/8" thick around the KS with high temp rtv and your good.

Just make sure you have your KS wire harness away from the edge of the vct or near the heads or you will get something like this:




I used high temp tape to secure the wires down the middle to ensure I wouldn't pinch them again.

Also be damn careful with the OPSU

[JayTA98]

I did this project last couple of weeks and it fixed my idle. I replaced the knock sensors as well. Be careful when you remove the wire harness the plastic tabs could break. If you have the chance buy the sensors and a new wire harness. Changing the VC is not too hard if you have a dremmel tool to cut the piece inside the valley. I needed the coolant bypass kit as well.

If you can remove the OPSU before you take the intake its better. Is kinda of hard to reach back there but if you can buy the special socket for it and remove it.

[My00Z28]

do i want to put that bead of rtv at the top of the VC where the caps are or at the bottom of the VC next to the sensor its self?

[JayTA98]

do i want to put that bead of rtv at the top of the VC where the caps are or at the bottom of the VC next to the sensor its self?

on top of the VC

[My00Z28]

aight thanks!

[My00Z28]

so finally complete but i got a question that about made me SH*T my pants... as i was torquing my intake down the freaking thing cracked in 4 spots the torque was 86 inch lbs and i didnt even make it there yet 3 of them cracked while torquing and 1 cracked 3 minutes after it was torqued!
Heres a Pic(they all cracked in the same spot!!!)


and this was taking it apart!




Half full of water!

[SMWS6TA]

yep, that is what kills them every time. Do you pressure wash your engine bay?

If so stop, I use a hose on low pressure.


Also OP, I have a LS1 Intake if yours goes very bad. PM me if interested.

[My00Z28]

yep, that is what kills them every time. Do you pressure wash your engine bay?

If so stop, I use a hose on low pressure.


Also OP, I have a LS1 Intake if yours goes very bad. PM me if interested.

no i use a hose but i think i got alittle water happy but it will never do that again after my rtv job and if the ls1 intake goes bad it would kill me to put a stock intake back on unless its an awesome price but if i ever pull it off again an ls6 or better is going on!!! the car seems to run fine tho so the cracks didnt go through so i think ill be fine for a while!

[JayTA98]

so finally complete but i got a question that about made me SH*T my pants... as i was torquing my intake down the freaking thing cracked in 4 spots the torque was 86 inch lbs and i didnt even make it there yet 3 of them cracked while torquing and 1 cracked 3 minutes after it was torqued!
Heres a Pic(they all cracked in the same spot!!!)


and this was taking it apart!




Half full of water!

I didn't knew the VC has a pool option for the KS. lol. Mine looked exactly like yours minus the water. It was all corroded. I forgot the RTV. Oh well next time I pull the intake or the KS goes bad.

[My00Z28]

haha water cooled knock sensors!

[SMWS6TA]

I just offer as an option in case you really needed it to get moving again.

[My00Z28]

O ya I will forsure let u know if they start to affect the way it runs... seems to be fine just those little supports broke

[sjsingle1]

just build that dam around the knock sensor hole......no need to glue the cap to the VC with silicone