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If you don't already have one, get a flexplate tool like Kevin recommended. It'll make you wonder why you waited so long.

I had a small bolt drop off of the cowl of a truck into the intake after we built an engine for my oldest son. Took out a head and two pistons.

Got a sign to put on the cowls from that point on: This is not a parts bin!!!

Good luck, hope it turns out to be something simple and inexpensive for you.
 

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Re: 454 Won’t Turn Over

Don't force it but you allready knew that..

Almost sounds like you ran a bolt in somewhere that was too long and its hitting something..

Always put ALL parts into a can.. I like new paint cans..
 

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Discussion Starter #23
First off I wanna say thank you to everyone who offered a suggestion. I removed the starter, the plugs, the fuel pump, and loosened front accessory bolts near fuel pump. Wasn’t able to crank it over. I was however able to rotate the motor backwards a bit and then back to it’s original position. Tomorrow I’m gonna try to rotate by prying on the flywheel/torque converter bolts. Also getting my hands on a bore scope to look down in the cylinders. Stuck a pipe cleaner in each spark plug hole and pulled it out dry every cylinder, I was in fear of some type of hydro lock. I’m open to any thoughts or opinions you guys may have. I’m sure a lot of you guys have been doing this stuff for a lot longer than me as I’m a ripe 23
 

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Discussion Starter #24
Good call on the flexplate tool. I’m gonna have to get one of those. They’re pretty cheap & definitely worth having
 

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Since completely assembled have you turned the engine over completely by hand? What has changed since that time? Leave no stone unturned.

Was the flywheel on? Were the valves adjusted? How did you get the torque converter bolts in?

One other thought. You might see if you can borrow a borescope to look in to each cylinder.

I would be systematically removing engine attachments and any know source of contact until it will turn over completely. Then I’d likely try starter again.
 

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If you were turning it over without fan belts before, and now they are installed, they need to be looked at. It is possible they are routed in a way that they "lock " the motor in place ......example ( one over, one under water pump)
 

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Discussion Starter #28
Since completely assembled have you turned the engine over completely by hand? What has changed since that time? Leave no stone unturned.

Was the flywheel on? Were the valves adjusted? How did you get the torque converter bolts in?

One other thought. You might see if you can borrow a borescope to look in to each cylinder.

I would be systematically removing engine attachments and any know source of contact until it will turn over completely. Then I’️d likely try starter again.
Motor was completely assembled and running from a dump truck. Only thing I changed/added was an intake, accessories, and fuel pump. I removed all these things to try less the intake. Another note there is no belt on the accessories ATM. Trans was on the motor when I dropped it in with all torque converter bolts installed properly. I bagged & tagged everything I took off. So essentially it’s exactly the same as it was 2 weeks ago except for the face that it won’t spin. One theory I have is the crank pulley bolts go too far through the damper and are pressing up against the block. Imma test that stretch of a theory today & hopefully getting my hands on a bore scope as well
 

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Discussion Starter #29
Here is a little plaque I made for a friend after he had an "oops"



Dont let this happen to you <img src="http://www.chevelles.com/forums/images/smilies/smile.gif" border="0" alt="" title="Smile" class="inlineimg" />
I hope I don’t have a similar plaque on my wall hahaha at least not any time in the near future
 

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Discussion Starter #30
If you were turning it over without fan belts before, and now they are installed, they need to be looked at. It is possible they are routed in a way that they "lock " the motor in place ......example ( one over, one under water pump)
I was turning over via the damper bolt with as little as 50 ft/lbs. No belt on any of the accessories yet
 

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You can get a bore scope from Amazon that will plug into your phone for about $25. Works great. Good luck.
 

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Discussion Starter #33
Problem solved! This is one of those times it feels good to do something stupid. I used the crank pulley bolts from the s10 setup I have because the old 454 pulley bolts were WAY too long. Turns out the s10 bolts were too long too and pressing up against the block going through the damper. Thanks for all the help guys, maybe some of this info can help the next guy. Now I just gotta access any damage, hopefully I didn’t hack up the oil pan or anything significant on that front cover
 
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