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Locked engine

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Old Feb 11, 2019 | 6:21 PM
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Leland drives 1967 Chevy c20's Avatar
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Default Locked engine

someone please help me. I just replaced all of the gaskets on my 292. After I put it together it turned over a while then slam! No longer turns over fully. It moves freely back and forth but stops suddenly at a point. So yeah I’ve spent well over three days on it and now I’m screwed. Here’s a link to the video.
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Old Feb 11, 2019 | 7:21 PM
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I see the water pump isn't the issue, what about the alternator? Can you bar it over manually with a break over, and socket?
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Old Feb 11, 2019 | 7:32 PM
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Take the rockers off and see if it still does it.
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Old Feb 11, 2019 | 9:36 PM
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Your cam is out of time with your crank gear. You have an exhaust valve that isn't closed and a piston is hitting it. I think you are going to have to pull the head, because you tried to use the starter on it, and that would have bent a valve for sure.
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Old Feb 11, 2019 | 11:12 PM
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Originally Posted by oldchevy
Take the rockers off and see if it still does it.
ok thanks for the advice! I’ll give it a try tomorrow. I notice you comment on a lot of threads I do. Thanks! I appreciate the time and effort!
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Old Feb 11, 2019 | 11:14 PM
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Originally Posted by Kazoocruiser
Your cam is out of time with your crank gear. You have an exhaust valve that isn't closed and a piston is hitting it. I think you are going to have to pull the head, because you tried to use the starter on it, and that would have bent a valve for sure.
only thing is I did zero timing adjustments and never touched the cam. Maybe something went wrong? But I would like to say it ran perfect prior to the gasket changes.
Also thanks for the advice! Much appreciated!
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Old Feb 11, 2019 | 11:15 PM
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Originally Posted by kevinkpk
I see the water pump isn't the issue, what about the alternator? Can you bar it over manually with a break over, and socket?
ok so the alternator is all good. Something is locking in the engine. It’s not bottom end as far as I know. I took of the oil pan and no signs of damage.
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Old Feb 12, 2019 | 6:53 AM
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As oldchevy suggested, and I agree, roll the rocker arms off the rods, you can isolate top to bottom of the engine being the problem. Since you removed the oil pan, try rotating the crank shaft by hand.I've not seen this issue in forever, but is it possible the oil pump lost it's prime, and since you are there, take the pump, and reprime it just to say you did. Sometimes if an engine has sat for long periods, the oil pump will not prime when first cranked., good luck!
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Old Feb 12, 2019 | 11:28 AM
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Default The answer.



Originally Posted by kevinkpk
As oldchevy suggested, and I agree, roll the rocker arms off the rods, you can isolate top to bottom of the engine being the problem. Since you removed the oil pan, try rotating the crank shaft by hand.I've not seen this issue in forever, but is it possible the oil pump lost it's prime, and since you are there, take the pump, and reprime it just to say you did. Sometimes if an engine has sat for long periods, the oil pump will not prime when first cranked., good luck!
it was a bolt in one of the cylinders.
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Old Feb 12, 2019 | 11:49 AM
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That's a big ouch! Don't think you can use that one again!!
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