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post #1 of 14 (permalink) Old 03-19-2014, 08:11 AM Thread Starter
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Cam Position Sensor Knocking

Hey all ive got an 07 ss/sc and when the car gets to operating temp I hear a knocking sound coming from the cam sensor. I can feel it too when I hold a finger on it. No codes.


2007 SS/SC Lazer Blue Metallic. 2.90" pulley, 42# Injectors, K&N Typhoon Intake, Badmab Header, ZZP 3"dp, HPTuned, and Tsudo Muffler.
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post #2 of 14 (permalink) Old 03-19-2014, 08:38 AM
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Its not the cam sensor, its something inside. Is it a knocking or a ticking?

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post #3 of 14 (permalink) Old 03-19-2014, 08:56 AM Thread Starter
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Its a knock. Its not comimg from the botom end. I pulled the valve cover everything looks good. I cant afford to fix it so I hope it doesn't blow up.

---------- Post added at 07:56 AM ---------- Previous post was at 07:41 AM ----------



2007 SS/SC Lazer Blue Metallic. 2.90" pulley, 42# Injectors, K&N Typhoon Intake, Badmab Header, ZZP 3"dp, HPTuned, and Tsudo Muffler.

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post #4 of 14 (permalink) Old 03-19-2014, 09:18 AM
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Sounds like a possible rod knock. Just because you hear it on the top, doesnt mean its not coming from the bottom. Could also be a failing timing chain tensioner, which youre gonna want to do right away. Pull the valve cover again and push on all the rockers to make sure they are seated tightly.

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post #5 of 14 (permalink) Old 03-19-2014, 09:30 AM Thread Starter
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Comprrssion and leak down is great rockers are perfect. Chain and tensioner were just replaced. Its only at idle.


2007 SS/SC Lazer Blue Metallic. 2.90" pulley, 42# Injectors, K&N Typhoon Intake, Badmab Header, ZZP 3"dp, HPTuned, and Tsudo Muffler.
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post #6 of 14 (permalink) Old 03-19-2014, 10:16 AM
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Sounds like a slight rod knock to me. That can be caused by having too little oil pressure at an idle and when you give it more throttle it builds up the oil pressure to where it should be. Changed your oil lately? If not, I would HIGHLY recommend putting in a quart or trans fluid in your oil and running that for about a day or so then change your oil. That will really help clean out the oiling system.

As banker said, Rod knock isn't always heard from the bottom, my evo when I spun my rod bearing and had rod knock it sounded like my cams were hitting the valve cover.

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post #7 of 14 (permalink) Old 03-19-2014, 10:50 AM Thread Starter
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Damn. Thing only has 100k and was well taken care of and never beat on. I changed the oil 1k miles ago.


2007 SS/SC Lazer Blue Metallic. 2.90" pulley, 42# Injectors, K&N Typhoon Intake, Badmab Header, ZZP 3"dp, HPTuned, and Tsudo Muffler.
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post #8 of 14 (permalink) Old 03-19-2014, 05:04 PM
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Hi kyspe,

I'm sorry to hear of your vehicle concern. I cannot guarantee anything but I will be glad to look into this for you. Please send us a private message referencing your concern if any extra help is needed. I look forward to hear from you!

Kristen A.
Chevrolet Customer Care

Have you checked into Chevrolet Owner Center? You can maintain service history, check on warranty or recall information, and more. Visit my.chevrolet.com!
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post #9 of 14 (permalink) Old 03-19-2014, 05:18 PM
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I'd say you spun a rod bearing and what you hear is the piston slapping the head. It could still run for a while but I think it's days are numbered. It isn't going to blow but it isn't going to get better.

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post #10 of 14 (permalink) Old 03-19-2014, 07:39 PM Thread Starter
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I just bought the damn thing 3 weeks ago. Why would it only knock at aperating temp? I thought rod knock was alot louder.


2007 SS/SC Lazer Blue Metallic. 2.90" pulley, 42# Injectors, K&N Typhoon Intake, Badmab Header, ZZP 3"dp, HPTuned, and Tsudo Muffler.

Last edited by Soaxin; 03-19-2014 at 07:44 PM.
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