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Manually Rotating a 454

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Old Feb 28, 2009 | 03:50 PM
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Default Manually Rotating a 454

Hey there. I was wondering if anyone could tell me the easiest way to manually crank a 454 (in the car) with an automatic transmission. My timing marks fell off and I need to replace them.

Thanks for the help.

Adam
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Old Feb 28, 2009 | 04:03 PM
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Originally Posted by 71rookie
Hey there. I was wondering if anyone could tell me the easiest way to manually crank a 454 (in the car) with an automatic transmission. My timing marks fell off and I need to replace them.

Thanks for the help.

Adam
crankshaft bolt or flywheel turner if you have a dust shield.......
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Old Feb 28, 2009 | 04:24 PM
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Originally Posted by midyearvette
crankshaft bolt or flywheel turner if you have a dust shield.......
Thanks. Do you know if you can do it by manually rotating the oil pump gear?
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Old Feb 28, 2009 | 04:32 PM
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Originally Posted by 71rookie
Thanks. Do you know if you can do it by manually rotating the oil pump gear?
i really do not understand the question!!....i would have to say no......
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Old Feb 28, 2009 | 04:44 PM
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Pull the plugs and put the trans in neutral. Should be able to easily rotate by hand using the damper.
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Old Feb 28, 2009 | 05:53 PM
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As long as the belt is tight you can use a breaker bar and one of these two, either a 7/8 or 15/16 socket on the alternator fan nut. Still too hard, remove the plugs and then proceed....
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Old Feb 28, 2009 | 08:31 PM
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Originally Posted by Ironcross
As long as the belt is tight you can use a breaker bar and one of these two, either a 7/8 or 15/16 socket on the alternator fan nut. Still too hard, remove the plugs and then proceed....
Thanks guys!!!
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Old Feb 28, 2009 | 08:58 PM
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Originally Posted by 71rookie
Thanks. Do you know if you can do it by manually rotating the oil pump gear?
71rookie,

If you are asking if you can rotate the engine by spinning the distributor, you would most likely just twist the distributor shaft in two and if the shaft didn't twist off, the second most likely scenario would be that you would strip the gear on the end of the camshaft and/or distributor shaft since it is designed as a drive gear that isn't meant to be driven.

The best place to rotate the engine from is the bolt that holds the harmonic damper to the end of the crankshaft. It's highly unlikely that you would strip the threads or snap that bolt off, especially if the spark plugs are also removed.

Jay

Last edited by griffths; Feb 28, 2009 at 09:01 PM.
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Old Mar 1, 2009 | 12:14 AM
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You'll likely be surprised how easy the engine turns with no spark plugs. Just don't forget to put them back in, or you'll have trouble starting it.....


Scott
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