Thread: coolant elbow leak again

Three month after replacement during LIM work, This elbow leaked again!
Is there any tips for correctly seating this dreaded elbow to the engine block?

By the way, the replacement elbows I used are from autozone help section, Dorman brand. I heard someone complained that these elbow is slightly thinner than the OEM parts, hence causing the leak. Anyone can comment on this?

Thanks.