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Old 03-14-2006, 06:53 PM
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Removing Crank with Pistons & Heads Installed

I know, this sounds crazy but...

Has anyone ever successfully removed a crank from a sbc with the pistons/rods and heads installed? Is it possible? If it is I bet it's a b****. It's kinda late but I really need to go back and check the crank main bores due to a cap issue.

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Old 03-14-2006, 08:24 PM
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Ive never heard of it being done, but I guess its possible?????
See if a more experienced builderwill chime in. Hg
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Old 03-14-2006, 08:29 PM
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its probably possible to get out, but, i really doubt u'll have much luck getting it back in...
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Old 03-14-2006, 08:36 PM
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YES,, you can remove/replace the crank from a SBC without pulling the pistons and rods..
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Old 03-15-2006, 03:49 AM
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good to hear BOBCRMAN. LEt's just see if I'm competent enough to do it w/o f'in anything up.
I'll let you all know

Thanks
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Old 03-15-2006, 05:40 AM
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I just helped a friend install the crank back into his SBC a week ago. You have to be very careful. Definitely a two or three man operation. He had sections of rubber hose on all of the rod bolts to avoid gashing the journals. We were able to gently pry up the pistons, one at a time, with a flat-bladed screwdriver and carefully turned the crank as needed.
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Old 03-15-2006, 07:49 AM
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Did this more than once, like MI2600 and BOBCRMAN said, it is more of patience than any other thing. Try to get someone else to help You, drive pistons up in their holes, it is easier. Rubber hoses on rod bolts is a must. Remove plugs to make pistons goes up easier.
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Old 03-15-2006, 08:00 AM
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Don't push the pistons out to far or the top ring might slip above the deck. Try taking off all the cap, after marking them, and rotate the crank to push the piston to TDC, then as the crank comes down the piston will stay in place. Do all eight and lower the crank. I've done it before after trashin some main bearings. While in the car.
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Old 03-15-2006, 08:03 AM
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take your time. pistons all the way up, slow & easy is the key. if you can find a buddy to help, two sets of hands / eyes makes it a lot easier
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Old 03-15-2006, 08:29 AM
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same here, i have done it...rubber hose on the rod bolt end..and a few extra hands if you have room under the car--truck..
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