ak diesel driver
6.5 driver
anyone ever see a 506 block that didn't have 506 cast in the valley? there's nothing there
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506 block ?
- Thread starter ak diesel driver
- Start date
matuva
Tropical 6.5er
Brazilian or "canadian" one?
ak diesel driver
6.5 driver
AFAIK oem in a 99
bison
Well-Known Member
How do you know it's a 506.?
Maybe that orig mill was replaced already....China comes to mind.
Some Chinese versions don't have 506 in the valley
Maybe that orig mill was replaced already....China comes to mind.
Some Chinese versions don't have 506 in the valley
ak diesel driver
6.5 driver
has a casting number on the back of the block, drivers side.
buddy
Active Member
I think those new casts you can get that are not AMG probably. like this one
http://www.6-5liter.com/block_casting.html
I would never get thas over an AMG engine, but still probably better than a used rebuilt GM engine.
http://www.6-5liter.com/block_casting.html
I would never get thas over an AMG engine, but still probably better than a used rebuilt GM engine.
3500GMC
What T F, over
Are any of these castings known to have 'siamesed' bores?
ak diesel driver
6.5 driver
I guess I'll have to take some pics. the valley is not smooth it has casting dots just no number
buddy
Active Member
Ive heard of that too. Does it have oil squirter holes?
ak diesel driver
6.5 driver
yes
ak diesel driver
6.5 driver
buddy
Active Member
That looks like one someone else had that had to different cast numbers, like 506 where yours is and 141 on the back. Is there anything on the back? And his didnt have the squrter holes despite having the 506 on it. And it had the diamonds in the valley there like that.
So either a GM reject or a China casting.
So either a GM reject or a China casting.
ak diesel driver
6.5 driver
it does have cracks on the mains. mostly was wondering about it.
bison
Well-Known Member
There should be "506" cast on the block behind the flywheel.
One way to tell china made is the sharp edges on the casting between the bores on the underside were the camshaft rides.( GM is smooth and rounded there)
I don't think its a GM reject, cause even on these there should be 506 in the valley as it was cast in when the block was made.
Reject occurs after machining when specs are not met
One way to tell china made is the sharp edges on the casting between the bores on the underside were the camshaft rides.( GM is smooth and rounded there)
I don't think its a GM reject, cause even on these there should be 506 in the valley as it was cast in when the block was made.
Reject occurs after machining when specs are not met
buddy
Active Member
Yeah, reject or red headed step child maybe I should have said. Put a 4 between the vertical lines and you have 141, but might have been some of the first 506 casts.