Knock Sensors are toast: Why?
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From: Chino Hills, CA
Knock Sensors are toast: Why? Okay, so the car is off the road for a heads/cam install and I decided to take apart everything a little in advance. I wanted to inspect the valley. So in the process of removing it I found that the knock sensors are completely corroded/burnt. They have an odd smell to them. Not only that, but they was some junk at the bottom of the tubes. I'm glad I vacuumed it before I pulled it off. Anyone know the cause of this? I'm going buy new sensors and a harness anyways. FWIW the tubes seemed to be sealed well.
water. most likely your getting moisture under your intake and its condensating and dripping down in the valley pan, into the knock sensors. do you spray your engine with water? thats a no-no. if you do, dont spray directly at the front of the intake.
Thread Starter
TECH Enthusiast
iTrader: (3)
Joined: Jun 2004
Posts: 640
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From: Chino Hills, CA
I washed off this engine once or twice, but not an excessive amount of water. I washed my Camaro's engine a lot of times and when I pulled the sensors they were spotless. So... maybe somehow it was getting in there... or the previous owner drenched it.
Originally Posted by Third Gear
I washed off this engine once or twice, but not an excessive amount of water. I washed my Camaro's engine a lot of times and when I pulled the sensors they were spotless. So... maybe somehow it was getting in there... or the previous owner drenched it.
Originally Posted by Third Gear
I'll be sure to seal it up really well, thanks 
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Originally Posted by V6 Bird
Also use Dielectric grease on the connectors. And yes replace both sensors and the harness and then seal the boots to the valley cover.
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