Knock Sensor Question
Thread Starter
Instructor
Joined: Apr 2008
Posts: 240
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From: San Diego CA
Knock Sensor Question
Could someone explain what a knock sensor is, what it does, how to remove it, and show me a pic of where it is? STILL LEARNING! i think this might have been usefull when i installed my EWP last month. 
Team Owner
Joined: Jan 2003
Posts: 20,315
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From: Summerland B.C. Canada
This is from my 86, but the principle and location, are the same.
http://members.shaw.ca/corvette86/El...%20Control.pdf
http://members.shaw.ca/corvette86/El...%20Control.pdf
Team Owner
Joined: Jul 2004
Posts: 28,462
Likes: 3,288
From: Hartford WI
It informs the ECM that you are experiencing pinging. No, you can't hear pinging until it gets more severe. When the KS detects it, your timing is retarded till it goes away. Why do you want to remove it?
Thread Starter
Instructor
Joined: Apr 2008
Posts: 240
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From: San Diego CA
thanks, now i understand! i could of sworn that the other day i was going through a thread and someone said that if you remove the knock sensor, because of its placement on the block, and its lower than the wp, you can drain almost all of the coolant out. Then when you remove the wp you don't have coolant pouring out so close to the opti. Is that right
Burning Brakes
Joined: Feb 2008
Posts: 988
Likes: 7
From: Sarasota Fl
You'll probably need a screwdriver to poke through the crap collected blocking the holes after you remove the sensors. I covered the wires and starter down there with aluminum foil and used a funnel to minimize the mess on my '91. You'll need a big socket too and it's important to torque them back to spec when reinstalling.
Team Owner
Joined: Jul 2004
Posts: 28,462
Likes: 3,288
From: Hartford WI
thanks, now i understand! i could of sworn that the other day i was going through a thread and someone said that if you remove the knock sensor, because of its placement on the block, and its lower than the wp, you can drain almost all of the coolant out. Then when you remove the wp you don't have coolant pouring out so close to the opti. Is that right
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If you reverse-thrust a 3 peak HP or higher Shop Vac, you can BLOW the coolant out instead of draining it. This way, you don't have to remove the knock sensors.
Make sure the engine is running long enough to open the thermostat and turn on your heater.
Next, open your radiator petcock, then slowly remove the radiator cap.
Put the vacuum hose over the radiator opening and let the forced air do the work for you. It gets all the coolant out of the radiator, engine block, and heater core, too!
Work smarter, hot harder, I always say!
Make sure the engine is running long enough to open the thermostat and turn on your heater.
Next, open your radiator petcock, then slowly remove the radiator cap.
Put the vacuum hose over the radiator opening and let the forced air do the work for you. It gets all the coolant out of the radiator, engine block, and heater core, too!
Work smarter, hot harder, I always say!
Last edited by onedef92; Dec 3, 2008 at 02:53 PM.