Valley Cover Removal | Knock Sensor Analysis & Why Not to Powerwash – vid 17

Valley cover and Knock Sensors GM 5.3 Vortec LS Engine

Valley cover and Knock Sensors GM 5.3 Vortec LS Engine

Getting ready to remove the front knock sensor - GM 5.3 Vortec LS Engine

Getting ready to remove the front knock sensor – GM 5.3 Vortec LS Engine

Rear knock sensor got wet and threw code - GM 5.3 Vortec LS Engine

Rear knock sensor got wet and threw code – GM 5.3 Vortec LS Engine

Removing the valley cover is pretty straightforward.  However you need to pinch the connectors on the knock sensors pretty hard to get them out.  Then, the knock sensors come out using a 22mm socket.  Then the easy top bolts and the thing comes right off.

Things I learned:  I read somewhere to power wash your engine before taking on a task like this.  So I did (about a week prior to starting).  A few days later I got a check engine light (don’t remember the code, but it was the knock sensor).  I did some more reading and discovered that power washing the engine can get water in the knock sensor and throw a code.  So, when I pulled that knock sensor out and saw what bad shape it was in, I was not surprised.

Difference in knock sensors with one ruined by power washing engine (GM 5.3 Vortec LS Motor)

Difference in knock sensors with one ruined by power washing engine (GM 5.3 Vortec LS Motor)

Another learning experience:  Much earlier, when I pulled the heads, I was planning a cam swap.  I was not planning on pulling the motor at that point.  By the time I filmed this video,  I find myself wanting to pull the motor and I don’t have heads on it as a convenient attach point.  I purchased the lift plate you see in the video, and I am glad I did.  It made pulling the engine a cinch.

 

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