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I will say that the Mechanic to me seems EXTREMELY detailed and organized. Parts appear to be carefully placed (working with what space/protective measures he has.)
(I think most owners would be in tears if they saw they car like this. I know I would.)
Hopefully he will take his time, use the torque specs required, and use a torque wrench on every bolt that calls for it.
I would ask for thread locker on my pressure plate bolts, etc if possible.
I also copied every single picture he uploaded of this car disassembled.
This is the BEST THREAD I HAVE EVER SEEN ON THIS WEBSITE. I got goosebumps seeing those pictures.
All this information is priceless if you plan to own this car or you already do.
NOTE: Wikipedia states GM had problems with LS-engines, oil weeping on some cylinder heads. Maybe that's where the leak is, and not the engine block.
From Wiki:
"Problems........Another common problem with the 04-06 5.3L engines was cracking cylinder heads. This is commonly called the 'Castech Head' failure on the internet. GM issued a TSB on this failure to help service techs identify the problem. The head casting (which can be viewed from the passenger side of the vehicle just in front of the valve cover) was 706. Some heads with this casting number would fail, but not all of them as GM had different suppliers for the same head. The failure was due to undetected porosity around the oil drains in the head.[12]"
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