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Old 12-18-2013, 07:08 PM   #1
nate4027
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Intake cam sprocket

I know this has the VCT on it but is it suppose to have slight play back and forth to it? I checked the torque on the sprocket bolt and it is still in spec. Thanks


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Old 12-18-2013, 09:53 PM   #2
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The sprocket is spring loaded to the cam and partly how VCT works. Sprocket stays steady as the cam moves back and forth in it to vary the timing.
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Old 12-19-2013, 04:13 PM   #3
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That doesn't explain why I have play in that sprocket though.
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Old 12-19-2013, 08:32 PM   #4
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Oh yes it does, you just have to be able to understand it.

Now, if you have say slight looseness so that you can say move sprocket by hand with absolutely zero movement at cam then the sprocket is broken, either loose pins or internal damage, spring could be broke or piston. It's normally spring loaded hard enough that bare hand cannot move it.

On normal engine with VCT you can have timing belt all tight and right and simply push in on belt to make slack to seem as if sprocket is broken but engine oil pressure takes over to fix that as soon as engine starts up. Sometimes engine can even stop with slack in belt but not an issue. Seen it before.
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Old 12-22-2013, 01:21 PM   #5
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I got it all put back together and it runs fine, no codes or anything. It does have the symptoms of a broken sprocket by your description though.
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