So my Engine was rebuilt and has been bagged off but has been sitting In a garage for years. I hesitate to take it apart as I have little rotary hands on knowledge. Oh Yeah it’s a 3rd gen twin turbo engine.

Do I need to crack it open and replace any seals or Orings? Basically what all do I need to do to check that it’s in good condition to be ran. I know generally on a fresh rebuild you put assembly lube all over everything tell the oil can get in and take over.

I just want to take every precaution to the best of my ability since it’s been sitting so long having never been installed

 

If you can turn motor over by hand [A bar and socket on front pulley ] and feels smooth with no tight spots you engine should be ok if engine was coated with oil when rebuilt..

 

I'm no pro, but my thought is that a LOT would depend on how the engine was prepped during the rebuild. If the builder expected that the motor was going to be run within a week than they may have done things differently to if they knew it would sit for years.

Personally I would get it on a stand, rotate it by hand, and visually inspect the internals through the exhaust port.

I rebuilt my own motor in 2013 and its sat in my garage for 7 years. I knew it would be sitting so I used extra vaseline and dumped a bunch of premix into the combustion chamber. Nothing is stuck and nothing is rusted, so that's good

On the other hand... I've heard of "builders" using crisco for assembly, then blaming the customer for not starting the motor immediately.