I'm a little embarrassed to admit that it's taken me over 4 months of on/off effort to get my Hahn turbo installed. Because it's been sitting so long w/o being started, and the oil pan was off for about 1.5 months or so, allowing plenty of time for oil to drain away from the internals, I'm concerned about making sure I have the oil pump primed so that oil flow is quickly restored to the engine.
As part of my install, I replaced my oil pan with a pre-modded oil pan from Hahn and had to transfer the oil pickup tube from my old pan to the modded pan. Not seeing any evidence of any sealer on the tip of the oil pickup tube, I relied on the oil pickup tube just being a jam-fit into the oil pan. When reinstalling the modded pan, I made sure to place gasket material around the perimeter of the oil pan and around the oil pickup opening that connects to the block as directed.
Per a suggestion from @rabtech, I did the following after I got the turbo oil lines hooked up (but before the engine was ready for a test-start). "First thing.... before you start an engine that has not been started in a while you can unplug the harness that feeds the fuel injectors and coils and then hold your starter button in till it stops cranking. Do this two or three times to prime the oil."
After doing this, I disconnected the turbo oil lines to reclock the turbo so the drain line was as close to vertical as I could get it since I had allowed it to slip during the initial clocking process. At that time, I noticed that there was no sign of any oil having made it into the turbo. This has caused me to worry that oil might not have gotten properly sucked up the oil intake tube, possibly causing the oil pump to not have maintained oil flow.
Having read similar advice on various auto forums, I think @rabtech's advice is sound, but I am disturbed that I didn't see any evidence of oil flow during the attempted priming session. In the old days, the oil pump was driven off the distributor and could be turned manually to prime the oil pump , but with crankshaft-driven oil pumps on modern FI systems, the oil pump needs to be either primed using the method @rabtech quoted or some type of pressure system is used to get oil circulated thru the engine before starting the engine, or you can just start everything up and hope for the best.
Anybody know of any other solutions to ensure I have oil flowing thru the engine? Am I just overthinking this? I know engines can be allowed to sit for months and then start easily, but I just worry about whether or not the oil pump might have lost prime while the oil pan was off.
I've thought about squirting a little fogging oil into the cylinders since I need to replace the spark plugs anyway. This might help protect the cylinder walls/rings, but I'd prefer to know oil is actually flowing thru the pump.
I plan on trying @rabtech's method again, but I am a little concerned about too many engine revolutions if there is not enough oil in the lines.
This is one of those situations where a little knowledge can be a dangerous thing (paranoia) and I just don't want to think I've done everything correctly only to have the engine go BOOM!
Constructive/encouraging comments appreciated, but please don't further fuel my paranoia!
I still want to hook up my AFR/Boost gauge before I start the engine, so I have a few days.