Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

Locked up 454

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Old Dec 7, 2011 | 08:46 PM
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matt01ws6's Avatar
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Default Locked up 454

Ive had a locked up 454 for bout 30 years sitting in my garage now finally building it for my 70 chevelle. But I need to free up the bottom end to tear it down any ideas?
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Old Dec 8, 2011 | 06:59 AM
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Depends on where its locked up at! Rings stuck? bearings fried? Just start pulling it apart with a big hammer to get the piston and rods out. You are going to have to replace the rings and bearings anyway.
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Old Dec 8, 2011 | 06:25 PM
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Yea I kno I think it's the pistons rusted to the walls I've gt it torn down all the betting and **** in the bottom end are good still.
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Old Dec 20, 2011 | 04:57 PM
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Just "unstuck" a 427. Used brake fluid and ATF about 1/2 and 1/2 in the cylinders. Just wait a while and try to rock it. Then clean the walls with Scotch Brite as the pistons go down. Take your time or you may break a ring land. Just rock it a little at a time.

Al 95 Z28
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Old Dec 21, 2011 | 01:03 AM
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Originally Posted by Big Al
Just "unstuck" a 427. Used brake fluid and ATF about 1/2 and 1/2 in the cylinders. Just wait a while and try to rock it. Then clean the walls with Scotch Brite as the pistons go down. Take your time or you may break a ring land. Just rock it a little at a time.

Al 95 Z28
I did something like this with my 400 (didn't try the brake fluid trick though), just soaked in ATF, after letting it sit for some time I rocked it loose. Then I hit the walls with oven cleaner and a Scotch Brite after the pistons were knocked out, rinsed the block, then oiled it down. Worked pretty good (then I ended up punching it out to a 406 anyway, lol).

Last edited by 93Z2871805; Dec 21, 2011 at 01:14 AM.
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