Camping Truck Build, '01 Suburban 2500
#82
I was re-reading your post about your engine build and I saw were you said the block was Milled wrong.
Just to let you know, I had a block that went through the machine shop recently and they assembled it to check the deck height as I requested the block be decked a specific amount. They found the deck height was off side to side and would not clean up within what I specified.
I believe in your case, they only cleaned up the decks on your block and that they were off to begin with from the factory.
My first block was lower on 1 side then the other from the factory. It also had a low spot on the low side. My second block was within spec and cleaned up nicely.
Just to let you know, I had a block that went through the machine shop recently and they assembled it to check the deck height as I requested the block be decked a specific amount. They found the deck height was off side to side and would not clean up within what I specified.
I believe in your case, they only cleaned up the decks on your block and that they were off to begin with from the factory.
My first block was lower on 1 side then the other from the factory. It also had a low spot on the low side. My second block was within spec and cleaned up nicely.
#83
I was re-reading your post about your engine build and I saw were you said the block was Milled wrong.
Just to let you know, I had a block that went through the machine shop recently and they assembled it to check the deck height as I requested the block be decked a specific amount. They found the deck height was off side to side and would not clean up within what I specified.
I believe in your case, they only cleaned up the decks on your block and that they were off to begin with from the factory.
My first block was lower on 1 side then the other from the factory. It also had a low spot on the low side. My second block was within spec and cleaned up nicely.
Just to let you know, I had a block that went through the machine shop recently and they assembled it to check the deck height as I requested the block be decked a specific amount. They found the deck height was off side to side and would not clean up within what I specified.
I believe in your case, they only cleaned up the decks on your block and that they were off to begin with from the factory.
My first block was lower on 1 side then the other from the factory. It also had a low spot on the low side. My second block was within spec and cleaned up nicely.
Either way, this shop was paid to "set the deck to -0.010" with my specific pistons. This is above and beyond a standard clean up mill, and something with a clear target which was missed. Even the Potak book says anything over a 0.002" differential (0.007" in my case) should be corrected.
I think the different thickness head gaskets has alleviated the issue, I can't see any real downside to it in the long run.
#84
how far off was the deck height on your OEM block?
Either way, this shop was paid to "set the deck to -0.010" with my specific pistons. This is above and beyond a standard clean up mill, and something with a clear target which was missed. Even the Potak book says anything over a 0.002" differential (0.007" in my case) should be corrected.
I think the different thickness head gaskets has alleviated the issue, I can't see any real downside to it in the long run.
Either way, this shop was paid to "set the deck to -0.010" with my specific pistons. This is above and beyond a standard clean up mill, and something with a clear target which was missed. Even the Potak book says anything over a 0.002" differential (0.007" in my case) should be corrected.
I think the different thickness head gaskets has alleviated the issue, I can't see any real downside to it in the long run.

I guess he did a light cut on the one side and when he rotated it over it wasn't even touching the other side.
I only wanted to be around +.010 out of the hole.
I would have bought Cometec head gaskets but my machinist didn't want to mess with the block. I purchased a replacement.
#85
When measured, the factory pistons were around +.007 out of the hole on one side and like +.013 on the other side. The deck with the low side had a low spot in the center of the deck. I was going to end up between+.020 to +.025 out of the hole by the time we squared up both decks evenly. My Machinist even rebuilt he's Block decking machine thinking there was something wrong with it.
I guess he did a light cut on the one side and when he rotated it over it wasn't even touching the other side.
I only wanted to be around +.010 out of the hole.
I would have bought Cometec head gaskets but my machinist didn't want to mess with the block. I purchased a replacement.
I guess he did a light cut on the one side and when he rotated it over it wasn't even touching the other side.
I only wanted to be around +.010 out of the hole.
I would have bought Cometec head gaskets but my machinist didn't want to mess with the block. I purchased a replacement.
#86
4.8/5.3, 6.0 iron and LS2 block.








