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Old 05-30-2010, 10:53 AM
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350 help!

Hello out there fellow hotrodders. I need help! I am having trouble figuring out what bearings are the right for the crank and rods. I have a 3932442 crank, the old bearings say .010, however when I install the new bearings, the crank will not move, not even with a high peroformace starter hooked to it.I expect it to be tight but I don't think that's right. What am I doing wrong?

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Old 05-30-2010, 12:14 PM
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Quote:
Originally Posted by foxrodder
Hello out there fellow hotrodders. I need help! I am having trouble figuring out what bearings are the right for the crank and rods. I have a 3932442 crank, the old bearings say .010, however when I install the new bearings, the crank will not move, not even with a high peroformace starter hooked to it.I expect it to be tight but I don't think that's right. What am I doing wrong?
Welcome to the site, . Was everything marked before tear down so that all the rod and main caps go back where they came from. Is this a new build with machine work to the crank and block? are you sure you are putting the caps on the right direction also? are the bearing in the correct way do you have the thrust bearing in the right location ? Need more info on what exactly has been done to this engine to give proper help. JMO


Cole
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Old 05-30-2010, 12:47 PM
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350 help

Yes, I marked everything. I double hceked to make sure all of the bearings were sitting correctly. I am using a different block with the same casting. THe block that was damaged was worked .010, I put standard bearings in this morning and it works fine now. I am using the same connecting rods with new pistons so I am hoping to not have any other problems. I bought a kit from Summit Racing but most of the kit is incorrect, not their fault, I should have done more research before buying. I ended up with a .040 kit with pistons. Great service though. THanks, I will post when it is running, hopefully today!
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Old 05-30-2010, 12:50 PM
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So everything was checked at the machine shop? Needs to all be checked by a machine shop.


Cole

Last edited by eloc431962; 05-30-2010 at 05:11 PM.
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Old 05-30-2010, 04:15 PM
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You are using STD bearings on a .010 under crank?
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Old 05-30-2010, 04:32 PM
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did you have the rods checked by the machine shop, I have seen rods that needed resizing do this

try starting from scratch, first install the main bearings and check for rotation then install the pistons and rods 1 by 1 checking rotation after each is installed, if its a bad rod this will identify it real quick
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Old 05-30-2010, 05:09 PM
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Quote:
Originally Posted by GMC boogie
You are using STD bearings on a .010 under crank?
I just re-read the post and dang!!!!!!!!!!!! . To the OP you need to have all this checked at a machine shop. Or you are headed for some heartache. JMO


Cole
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Old 05-30-2010, 06:10 PM
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yea, I had everything checked out. IT is coming together nicely. RattVette, that is exactly what I did. one by one and it all checked out beautiflly. Thanks, I am taking a break and them on to the heads and into the truck. I'll keep you posted. I am excited to see it run
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Old 05-30-2010, 06:35 PM
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Quote:
Originally Posted by foxrodder
I am using a different block with the same casting. THe block that was damaged was worked .010, I put standard bearings in this morning and it works fine now.
This is very confusing. Maybe it's me.
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Old 05-30-2010, 07:53 PM
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Whats the bearing clearances? If you don't know run down to the local autoparts store and get plastigauge. Thats what I call it IDK if anyone else calls it something else. But they are little strips of plastic you put on a clean bearing and journal. You then torque the bolts and remove it and check to see how much its been sqeezed. This will tell you if the bearing clearances are right. Or get a mic and measure the journals. But like other people have said you might wanna take it to a machine shop to have someone look over it.
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Old 05-30-2010, 09:42 PM
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Quote:
Originally Posted by foxrodder
Hello out there fellow hotrodders. I need help! I am having trouble figuring out what bearings are the right for the crank and rods. I have a 3932442 crank, the old bearings say .010, however when I install the new bearings, the crank will not move, not even with a high peroformace starter hooked to it.I expect it to be tight but I don't think that's right. What am I doing wrong?
Info for the future-- Never try turning a new motor with the starter- turn by hand first to check for the problem you found. (good thing in did not move)
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