Third Gear

iTrader: (3)

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.

bww3588

iTrader: (49)

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.

Third Gear

iTrader: (3)

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.

bww3588

iTrader: (49)

more than likely, that is the only way they would have coroded like that. is to get water down in the holes.

marv

iTrader: (40)

Seal around the rubber boots with RTV...that will help prevent them going bad again.

Third Gear

iTrader: (3)

I'll be sure to seal it up really well, thanks

V6 Bird

iTrader: (15)

Also use Dielectric grease on the connectors. And yes replace both sensors and the harness and then seal the boots to the valley cover.

marv

iTrader: (40)

Didn't think about the grease, but that is a good idea...