|10-16-2008 01:45 PM|
|10-16-2008 01:11 PM|
|CNC BLOCKS NE||
Check out this guys work as I consider him and artist as we has a block that he had done and I would say frank repaired about 5 feet of cracks.
|10-16-2008 11:02 AM|
One point everyone is ignoring is the engine was running fine and not leaking. How likely are the hairline cracks to begin leaking after a rebuild? How likely are they to get longer, larger and begin to leak years down the road? Just asking, as I stay as far away as possible from later SBC.
thnx, jack vines
|10-16-2008 09:56 AM|
I do agree that unless this engine is not serial numbered to the car, that a replacement block is the way to go.
|10-16-2008 09:25 AM|
|6426yy||What year of corvette are we talking? If it needs decked chances are there gonna remove the VIN anyway. Find a block with the same casting #'s have it decked to 9.000" and no one will know the differance.|
|10-16-2008 09:00 AM|
|barnym17||Check into lockstich crack repair this is a common repair for this condition.|
|10-15-2008 10:03 PM|
|dt196||Actually, if it's the original motor out of his Corvette as he implies, it IS serialized to that car. But I do agree that it would be better to just replace it. By the way, which "anniversary" year is it?|
|10-15-2008 08:57 PM|
|4 Jaw Chuck||Toss it and don't look back, SBC's are a dime a dozen...its not like this one is serialized to your vehicle anyway.|
|10-15-2008 08:49 PM|
I have seen quite a few of the later one piece rear seal blocks stress crack above the lifter bores. Usually toward the rear and up a couple inches. Running at an angle across the surface.
I have drilled the ends of the cracks, V-eed these cracks out, heated the block to about 500 degrees and welded the blocks. But, this is not something most shops can do. Also a bit spendy if you have a blacksmith do it.
Another block would be cheaper, unless you really need the matching numbers
|10-15-2008 08:38 PM|
These cracks are from the block freezing in cold weather. I would not try to fix this because when you tighten the head bolts these cracks will pull apart and leak. I understand you want to keep the block but it is not worth throwing money at, just to have it leak at a later time causing more ruined parts and more down time. Junk it and find another block.
|10-15-2008 08:22 PM|
Cracks in lifter valley
Ive got a sbc with hairline cracks in the lifter valley across each cylinder water jacket. These showed up when magnafluxed. They showed no signs of leakage when the motor was torn down. I hate to get rid of the block because it is out of my anniversary model corvette. Can this be repaired and how expensive is it?