08 CTS with Sports Package and 165k miles
As I mentioned in my other thread, I am replacing the engine in my CTS. (It is the LLT, direct injection engine) I spent some time reading through the service manual to see what is involved so I can figure out as many questions as I can before the new (used) engine comes arrives. Addtionally, I'm throwing out a line for any battle-tested suggestions from anyone who has done this before.
- The service manual says I have to drain the A/C, disconnect it, and then reconnect when the new engine is installed. While I have a friend with the equipment to do this, I know many cars have work-arounds to swap the engine without ever opening the A/C lines. (IOW, disconnect the compressor from the engine, and leave it in the engine compartment while swapping the engine.) Is it possible on the CTS to engine swap while keeping the A/C intact?
- The new engine is from a reputable salvage place, but I would like to check it over as much as is reasonable before installing it. What are sensible tests that can be done with it on my engine stand? I can visually inspect the cams, etc. I can do a leak-down test on the cylinders. Are there other things I can/should check on it before install?
- Since I just installed several brand new parts (water pump, timing components, spark plugs) on the dead motor, should I move them to the new engine or just let them be? I'm back and forth in my head which adds more risk: Trusting the unknown timing components or cracking open the engine to swap the components. Thoughts?
- What should I lubricate in the new engine before cranking it for the first time? I'm assuming it has been sitting long enough that all previous lubrication has drained into the pan and that cranking it without priming things first with oil or assembly lube would be bad.