Locked up 2010 engine question HELP

So, for those that I have been following my posts I have yet another question. Long story short I had to replace an engine and did so with a 30k mileage engine. Find out today that engine is "locked up" because it was rolled over on its side in a collision. The guy we got it from guarantees the engine and will replace it or just give the money back if it's not functioning. The mechanic that's working on it said it's likely hydro locked from the crash and the v6 Toyota motors have this problem when rolled, the engine oil doesn't drain out if the cylinder head once it's upright I guess. The mechanic says that 80% of the time an engine that's hydro locked has internal problems bc usually it's been stopped abruptly, but the 2010 Tacoma it came out of surely had a kill switch for the fuel pump on rollover right? I'll find out more tomorrow but am I looking at yet ANOTHER engine that I need to find? Help!!

 

Wait and see....had a carburated kawasaki engine in a John Deere that hydro locked several times in its past. It was still running fine at 20 years when it was traded in.

 

Friend of mine hydrolocked(water not oil though) his jeep 4.0l. We got the water out, it ran fine for a few months then grenaded on the highway. When a fuel cuttoff switch is activated, there is still the fuel in the line to keep the engine running for a few seconds. All depends on the situation.

 

So, the guy that I bought the engine off of deals with nothing but Toyota's at his salvage yard. He came up to check and see what the problem was with the engine because he said that it had "turned" for him. Remember I am in no way a mechanic and I am trying to figure out the language on the fly. The mechanics that are working on the truck had failed to place the shim between the flywheel and the crank? Somebody on this site surely knows what that means, it may not have been those two parts but there was a shim that buffered two parts that took on torque, that's all I know. Regardless the guy that I bought the engine off of was laughing because they had attempted to torque it down and couldn't because the correct part wasn't in to do so. So not hydrolocked as they initially suspected. Thank God, I prayed that it wouldn't be another engine and I'm thankful it was not (at least to this point).

 

I hydro locked my old Touareg, I pulled the plugs and evacuated the water. Didn't suffer any ill consequences afterwards besides a wet floor. Never have I appreciated electronic ignitions with a crank-until-start function more