C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Stock bore size?

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Old May 17, 2010 | 11:45 AM
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Default Stock bore size?

I bought a 355 from a guy not to long ago and just this weekend got it torn apart. The pistons say .040 on them. Is this a stock piston ? Or do I have to measure the actual bore to find out...

thanks
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Old May 17, 2010 | 11:52 AM
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That means it is .040 (40 thousandths) over or 4.040. Will have to be sonic tested before it is bored further.
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Old May 17, 2010 | 12:05 PM
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The engine had a broken pushrod and I tore it apart to inspect. I don't plan on using much of it. One of the cylinders had a just noticable to touch imperfection. Whats the best route going forward...Just some background..I was looking to use the block, crank, pistons...as is and put a new cam and heads on it.

Last edited by t8j1w72; May 17, 2010 at 12:06 PM. Reason: spelling
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Old May 17, 2010 | 12:06 PM
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So that would make it a 357...?
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Old May 17, 2010 | 12:30 PM
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Originally Posted by t8j1w72
So that would make it a 357...?
Yes
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Old May 18, 2010 | 12:11 PM
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Originally Posted by t8j1w72
The engine had a broken pushrod and I tore it apart to inspect. I don't plan on using much of it. One of the cylinders had a just noticable to touch imperfection. Whats the best route going forward...Just some background..I was looking to use the block, crank, pistons...as is and put a new cam and heads on it.
Block is a boat anchor.
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Old May 18, 2010 | 12:19 PM
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Originally Posted by t8j1w72
The engine had a broken pushrod and I tore it apart to inspect. I don't plan on using much of it. One of the cylinders had a just noticable to touch imperfection. Whats the best route going forward...Just some background..I was looking to use the block, crank, pistons...as is and put a new cam and heads on it.
Block is a boat anchor.
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Old May 18, 2010 | 03:29 PM
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Originally Posted by t8j1w72
The engine had a broken pushrod and I tore it apart to inspect. I don't plan on using much of it. One of the cylinders had a just noticable to touch imperfection. Whats the best route going forward...Just some background..I was looking to use the block, crank, pistons...as is and put a new cam and heads on it.
Let a machine shop decide that for you. Maybe a sleeve is in order.
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Old May 18, 2010 | 03:36 PM
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Considering you can buy good seasoned roller blocks for $50 all day long it would be crazy to sleeve one.
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Old May 18, 2010 | 04:48 PM
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Originally Posted by bomar76
Considering you can buy good seasoned roller blocks for $50 all day long it would be crazy to sleeve one.
Not necessarily. I called for 2-3 days looking for the best price. I had to settle for $250. (for a 4-bolt though)

$150 for a 2-bolt was what I found.
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Old May 18, 2010 | 08:39 PM
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Originally Posted by GREGGPENN
Not necessarily. I called for 2-3 days looking for the best price. I had to settle for $250. (for a 4-bolt though)

$150 for a 2-bolt was what I found.
craigslst and old time type junkyards.

$50 as is shortblocks

look them over, buy 'em, take them home, strip them

the 385 in our Baja came as an assembled shortblock with pan from CL for $50, I bought it over the other choices cause the guy said he would load it on a pallet with his forklift.
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