rebuilding my 455 again

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Dennyboy

Master Mechanic
Jun 26, 2011
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Minnesota
So last year she started burming some oil. I stuck her in the back yard for the winter to rip the engine out this spring. I got it ripped down yesterday. I found to gouges in the #2and 8 cylinder wall. I left my measuring stuff at work so I wont know if a .060 over bore will fix it like i think it will. I was told .060 was still pretty safe. Welcome to all comments. Should I just get a new block or fix it if possible?
 

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What the hell caused that? Sorry I cant provide helpful info im just curious :lol:
 
Wrist pins some how slid into the side walls. Stock press fit ones some how slid out....
 
Well I measured the to bores today at work. Block is only good for a tabel at this point. Im going to pick one up tomorrow to get to the machine shop before they get really busy. Still thinking of going .060 over.
 
I have a .060" overbore on my 455. No problems.
 
Make sure you look into your wrist pin problem, I think I have seen what I thought was every way to junk a motor but I have never seen that before. If the pin is correct and it's not a bushed rod there is no way for it to work out, anyone who has pressed pins in before will agree with me it is a very tight press.
 
Yah id look into it more if I was using anything from the old engine except for the crank. The crank is at the machine shop with the block and new rods. Im going to have it punched 30 over, align honed. He will ballance all of it and ill assemble it. What kind of pistons do you guys recommend im looking for around 9.5 to 1. I would also like to stay away from press fit, do I need to use press fit ones with the stock rods? I was thinking of using the xe274 or would somone recommend something different? I have 342 gears.
 
I would recommend not going with a .060 over bore on a stock bore block. Because if anything were to happen again then you would need another block. You should want to go with a safe bore just in case. I have seen brand new engines drop a valve or snap a ring and gouge the cylinder wall and you don't want to be in the case where you would then need another block. Now if your new block needs to go .060 over then go for it.
 
Yah It needs a 30 over we decided to just leave it there
 
Dennyboy said:
Yah id look into it more if I was using anything from the old engine except for the crank. The crank is at the machine shop with the block and new rods. Im going to have it punched 30 over, align honed. He will ballance all of it and ill assemble it. What kind of pistons do you guys recommend im looking for around 9.5 to 1. I would also like to stay away from press fit, do I need to use press fit ones with the stock rods? I was thinking of using the xe274 or would somone recommend something different? I have 342 gears.


Any thoughts guys
 
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