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GMC V6 and V12 Engines Engine repair and rebuilding

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  #31  
Old November 26th, 2016, 07:51 PM
surfamtn surfamtn is offline
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Default Re: Nocking at high RPMs

OK TJ, I see the dot on the camshaft gear where the fuel pump pulley goes but I don't see another doctor, I see the groove for the spline on the shaft itself.

On the crankshaft year there's a spline and what looks to me to be 80 stamped on the gear. Is that the dot you're talking about there?
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  #32  
Old November 26th, 2016, 08:09 PM
surfamtn surfamtn is offline
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Default Re: Nocking at high RPMs

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  #33  
Old November 26th, 2016, 10:09 PM
James James is offline
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Default Re: Nocking at high RPMs

Quote:
Originally Posted by surfamtn View Post
OK TJ, I see the dot on the camshaft gear where the fuel pump pulley goes but I don't see another doctor, I see the groove for the spline on the shaft itself.

On the crankshaft year there's a spline and what looks to me to be 80 stamped on the gear. Is that the dot you're talking about there?
In reference to your picture of the cam sprocket the dot is opposite of the key way (in the casting area and not the machine area), look like a center punch mark.

In reference to your picture of the crank sprocket the mark is the "O" to the left of the key way.

This also match the layout shown in my service manual.
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  #34  
Old November 27th, 2016, 12:36 AM
surfamtn surfamtn is offline
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Default Re: Nocking at high RPMs

Ok..... that's what I get for posting from my phone... I'm gonna start a new thread with new pics.

Thanks to everyone
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