Is this bare block any good? Odd discoloration in honed bores...
02-01-2012, 11:44 AM
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Is this bare block any good? Odd discoloration in honed bores... I bought this bare block and crank a few weeks back with the hopes of using it for a rebuild. I was told it was honed and everything measured out to spec and was ready for a rebuild. Upon getting it home I could see this discoloration and one of the bores where it was worse there seems to be a slightly raised portion I can feel with my finger.
The guy that sold me the block told me that he had bent a rod. I have a feeling that maybe the bore wall has a small crack and that I might have to get it sleeved. I'd just like to put some pics up to get some advice. I know I am still going to have to it spec'd out by whomever builds it. This is more for peace of mind until I can afford to carry it up there. Thanks in advance -
The guy that sold me the block told me that he had bent a rod. I have a feeling that maybe the bore wall has a small crack and that I might have to get it sleeved. I'd just like to put some pics up to get some advice. I know I am still going to have to it spec'd out by whomever builds it. This is more for peace of mind until I can afford to carry it up there. Thanks in advance -
02-01-2012, 11:54 AM
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He said he had it taken to a shop, measured out to spec and honed and was ready for a rebuild. He said he would send the numbers later and when it came to it he couldn't find them. I trusted him plus it was dark and cold when we met to exchange though common sense says to look for this type of thing but I didn't.
I am also curious what would cause this type of damage. I mean if I got fucked out of my money on the block I'd hate to spend more money getting it tested just to find out the crank is bent or the block is useless...
I am also curious what would cause this type of damage. I mean if I got fucked out of my money on the block I'd hate to spend more money getting it tested just to find out the crank is bent or the block is useless...
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02-01-2012, 01:04 PM
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Rods usually bend and break at high rpms so if he bent a rod, you can imagine the type of force that would be exerted on the cylinder wall when the bent rod wants to go out sideways instead of up.
Know what I mean?
02-01-2012, 01:39 PM
#10
idk if its just the picture but that cylinder hone job looks aweful.....also i think i see scratches vertically up and down the bores.......tough to tell not in person but id have a machine shop look at that block before i did anything with it....
heres what my bores looked like after machining along with all the others ive done.....now obv mines an LT motor not an LS but its still the same wall material basically....(ignore the green color its just Total Seal quickseat compound..)
like i said id have yours checked
heres what my bores looked like after machining along with all the others ive done.....now obv mines an LT motor not an LS but its still the same wall material basically....(ignore the green color its just Total Seal quickseat compound..)
like i said id have yours checked
02-01-2012, 06:47 PM
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Discoloration is the shape of what water would look like, if allowed to sit in a block with pistons in it. I'd say the engine blew a head gasket, or was allowed to sit for a while with water in it.
Last edited by salemetro; 02-01-2012 at 07:35 PM.
02-02-2012, 01:48 PM
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It's fairly cheap insurance to have it magnafluxed. I bet they can check all 8 holes for less than $100 or that one bore for about $25....it that's your only concern. If you feel a raised portion, it's probably time to bore it.
02-02-2012, 02:34 PM
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Judging by how many cylinders are rust marked (that's what those marks are)....and the fact that the seller said he spun a rod (I'm guessing that you didn't get rods with the block)....I'd say that either;
A) Someone sucked a bunch of water in through the intake while the engine was running....bending rods.
B) The shortblock was left sitting out in the rain for a bit
C) The engine got hotter than hell, and blew headgaskets...filling the cylinders with coolant
Either one ya choose, it's not a good thing. If it were me, I'd have the block thoroughly checked out...then have it bored .005 to clean it up. If .005 won't do the job, look for a different block..... or have it sleeved.
Just my $.02
-James-
A) Someone sucked a bunch of water in through the intake while the engine was running....bending rods.
B) The shortblock was left sitting out in the rain for a bit
C) The engine got hotter than hell, and blew headgaskets...filling the cylinders with coolant
Either one ya choose, it's not a good thing. If it were me, I'd have the block thoroughly checked out...then have it bored .005 to clean it up. If .005 won't do the job, look for a different block..... or have it sleeved.
Just my $.02
-James-
