Is the blow by bad when you have to zip-tie the dipstick down to keep it from ejecting while driving??

 

Is the oil squirter still intact on that piston?

 

I still have to pull the oil pan. I'll be sure to check it out when I do though. I ran out of steam for the day, but I might get back to it tonight

 

What does the injector look like.. I wonder if it was leaking.

 

It does look like heat. I'm on board with the piston cooler checking. However I sure wouldn't run that injector again either.

How is the ridge at the top of the cylinder walls? Can you hang a finger nail on it? You might get away with honing the cylinders, new pistons, bearings, do the heads and put it together.

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It does look like heat. I'm on board with the piston cooler checking. However I sure wouldn't run that injector again either.

How is the ridge at the top of the cylinder walls? Can you hang a finger nail on it? You might get away with honing the cylinders, new pistons, bearings, do the heads and put it together.

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So, I got a second wind and almost finished the tear down. Only thing left besides oil galley plugs, cam bearings, freeze plugs, is the rear plate and crank. But then an earthquake hit and made me dizzy. It shook everything in the garage, including the engine on the stand. It was a bit spooky for about 15-20 seconds or so. So I'm done for the night.

A bit of back story that I failed to mention, the PO said that he took it to a mechanic and he said it was a bad #5 injector. Replaced it and still had issues (obviously) since the jackwagon didn't bother doing a compression check. So the #5 (an AB by the way), is new. But I don't care about the injectors since I'll probably be putting in 300/300s or something way too big lol

No ridge on the cylinder walls to speak of. Scraped off the carbon build up and it is nice and smooth. Pistons came out easy, no hangups where a ridge would be. I'll have to mic it out and see if it passes, but I'm looking to make 500-600 HP on this build. So "good enough" will not work for me. Much money is getting dumped into this, so I'll bore it 10 over if that gives me a good, straight bore with no imperfections. I could slap another piston in this thing and have a running 7.3 though. Easily. The bearings are in great shape. I wouldn't believe someone if they gave me this engine and told me it had 240k miles on it with the way the internals look. I've never seen one in this good of shape with so many miles. I'm really amazed. Only reason I do believe it, is because I bought the whole truck and when taking it apart I could easily tell no one had it out before.

All the cooling nozzles are good too. But with this thing getting used to haul weight up the passes, heat cycling seems likely (now that I did some research and asked around lol). The piston isn't split in two, but it was very close to it. The cracks made it down past the ring lands and into the wrist pin hole on one side. Close to catastrophic failure.

 

Earthquake eh? Yeah I hate those. Even the little ones we get. You are in the Yuma area right?

Glad you are discovering a solid unit. I've seen lots of broken pistons, but not one in a Powerstroke yet, that one is sure odd. Injector story sounds better and better.

I've got mixed emotions about boring one that doesn't need it, it's always possible that it will uncover a crack or a pin hole that needs fixing, but thicker cylinder walls makes me feel better. But I do see your point about wanting new and true. Just some thoughts.

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Earthquake eh? Yeah I hate those. Even the little ones we get. You are in the Yuma area right?

Glad you are discovering a solid unit. I've seen lots of broken pistons, but not one in a Powerstroke yet, that one is sure odd. Injector story sounds better and better.

I've got mixed emotions about boring one that doesn't need it, it's always possible that it will uncover a crack or a pin hole that needs fixing, but thicker cylinder walls makes me feel better. But I do see your point about wanting new and true. Just some thoughts.

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Yep, down in Yuma. The quake hit south of the border, so we didn't get anything bad.Still not fun to experience though. Too surreal for my taste.

I'm not one to bore or grind or remove material if not needed as well. Hoping to stay away from decking too, if I can. Thicker walls are preferred, but a 7.3 can be bored 30 over safely, and then it can be sleeved. So the block could go millions of mile, in theory at least. I'm only going overboard on this build because of the power levels I'm hoping to achieve, and a 10 over bore is still well within the margin. I appreciate the thoughts, that why I'm on this site lol

 

I'll keep the compression stock. Gives me more headroom for boost and I want to keep the power levels below the fire-rings and block-fill point. Needs to stay reliable and streetable since it's going into my trailer-tow/off-road rig.