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Unknown gen3 6.0 as far as mileage goes. I did hear it run before it was pulled and didn’t sound like it had any issues. It was in a work truck with a non original cluster. I got it torn down and did a cam, timing set, oil pump and oil pan. I was going to do valve springs and valve seals and decided to do a leakdown test since my tool just arrived. All the cylinders are about the same except #2 which is like double the others at about 55% leakage with 100psi air. I tried hitting the valves and blowing out around the seats and no change. From what I can tell the air is going into the crankcase so it must be the piston rings. I’m gona get a cam in there to make sure the piston top isn’t broken.
so what do I do now? Is this really worth it to tear it down, hone that cylinder and do new rings? This is gona be a turbo motor going in my 78 vette to replace the 5.3.
Putting boost on those clapped out leakers will give you an opportunity to take a serious look at the PCV system.
I'd consider a clean-up, hone, and a new set of rings, touch up the seats, and send it.
Putting boost on those clapped out leakers will give you an opportunity to take a serious look at the PCV system.
I'd consider a clean-up, hone, and a new set of rings, touch up the seats, and send it.
Ugh, reuse the stock head bolts too? I really didn't want to yank the heads.
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Cylinder leak down higher on one 
