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Forgot to mention that the block has the oil squirters, but main bearings with only one hole and (I assume) a standard volume oil pump.

That's the plan Will, as long as the block checks out. I hope to have it decked the minimum necessary and honed only, as long as the bores are round. I will "melt" all the sharp edges in the bottom of the block before I send it.

Crank is out, block looks good. I will be sending both out to be magnafluxed.

I read that the Promaxx heads have replaceable valve seats, which puts them ahead of Optimizer heads that cost almost twice as much. I will verify before I buy.

Look at my Cracked Pistons post from July.

IF the block is good (looks to be, so far), plan is to balance the crank and stud the motor. Crank mics at 2.399" on the rods, so plan is to polish only. Promaxx heads (at least port matched and tidied up). If block cleans up ok, std. pistons and heads will head to Chris to drop compression and...

Hey Will! How ya been? Looking back, there always seemed to be debate over whether or not the pistons in the n/a Optimers were heat treated. I can say for certain now that in 2006, they were not!

Hope not. I hope to unbolt the mains and pull the crank Saturday. So far, everything looks real good. Pulled motor due to cracks in the heads between the valves. Then I found that the pistons all had spider web cracks as well, no doubt due to lots of fuel and lots of w/m injection.

Could the moderator please remove the duplicate posts. The site kept telling me there was a server error and to try again later .......which I did!

Say a prayer for her fellas. Everything looks great so far. Need to get the crank out to really look at the webbing. Hopefully cleaning up the decks and a light hone in the cylinders. If the block is good, HV oil pump, studs, heads and 18:1 pistons (ceramic coated).

Not a 6.5 post, per say, but I recently used my dad's '13 HD with a 6.0 to pull my Massey Harris to a fair for a tractor pull. Driving over the mountain, I found that the truck could not hold 3rd gear with 8k of trailer behind it. It's a beautiful truck- loaded, garage kept with 23k miles on it...

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Yes, thinking '06 n/a Optimizer pistons are not treated.

At the suggestion of another member, I'm posting pics of my driver's side pistons. Passenger side look them same. Not a great day for the 6.5!

Just thinking that I've seen some with obvious scuffing, and I don't have that.

I push this motor hard, but water temps and egt were kept in the "safe" zone. Full crosshatch and no scuffing in the bores.

Noticed a small stream of bubbles in the expansion tank. Tore it down this week and SURPRISE, four matching cracks in the head! Can't wait to pull the other side!

I assume the quest here is to lower IAT/EGT. Few would probably want to follow my path on this, but in my experience it is important to cool the entire engine bay. Yes, I have the biggest Mishimoto cac that will fit between the frame rails and I have a water/meth system with a 14 gal/hr nozzle...

Will, where would that crack most likely be?

Nice work Chris, as always.