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Old 04-08-2005, 03:44 PM
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400 sb with spun bearing

Hey guys , I have a couple of questions for you. A guy I work with wants to sell me a Chevy 400 sb mated to a T-5 transmission. The engine comes with an Edelbrock RPM intake , alternator , PS pump , starter , water pump and the trans has a new clutch. He says the engine has a spun bearing. Now my questions are 1) What would be a fair price to pay for this setup and 2) What kind of engine damage should I expect to have from the spun bearing? Thanks for any replies.

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Old 04-08-2005, 04:06 PM
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Has he had the engine open yet? I believe the price should correspond to the damage. Have him tell you what is damaged and what is not...and find out if he's willing to stand behind his statements. Right now, you're bidding on a lot of unknown.

You could be looking at a new crank, or at least machining of the journals. Worst scenario whould be a cracked block.
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Old 04-08-2005, 05:15 PM
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If he hasn`t inspected the bottom end he should, as T-5`s are weak tranny`s and a 400`s torque would gut one easily. Was there a pilot bushing installed in the crank? if not this could make the knocking noise, also is the imput shaft bushing shot in the tranny? any noises made in this area sound just like rod knock. I would tell him to keep the T-5 and I`d negociate a price for the 400 alone.
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Old 04-08-2005, 06:30 PM
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Actually the guy that I work with is just the middleman. The motor and trans belongs to his nephew and is sitting in his garage , so he wants to get rid of it. It's been hard for me to get good info but from what I can gather , the kid got this motor and trans from somewhere and dropped it in a Camaro. He couldn't get it to run right . The old man told me that the engine has a small cam in it , but the way it was running , it sounded like it had a big cam in it. So I think what he was trying to say is that it was running really rough. So the kid got frustrated and just pulled the motor and trans and got a crate motor. I asked the old man how the kid knows it has a spun bearing , and he didn't know. This is all the info I have as of now. I guess if I go to look at it , I'll have to open it up and take a look. If all looks good , I could take it to a machine shop and have it gone through before I buy for it.
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Old 04-09-2005, 10:46 PM
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No info

Without proper info it is just a core. Since 400s are harder to find. I would pay 200 for the core and parts that come with it.

The tranny is up to you. Personally I wouldn't want it.
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Old 04-10-2005, 01:09 PM
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Thanks for all the advice guys.
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