Hey guys,
I recently did an oil change on my car using a new crush washer. Historically I've been in the boat of reusing it (even dating back to my older subarus) without any issues. For some reason I decided this time that I wanted to change the washer and sure enough I have a leak (1-2 drops per hour). I think I followed the same steps as I usually do, or so I think.
I used a torque wrench 1/2" drive and I didn't realize that it doesn't click at lower torque settings, so when I initially tightened it, I'm guessing I went maybe about a half a turn or a full turn after what it was supposed to be. So my first thought is that I overtorqued the drain plug and/or damaged the threads. Upon closer review, I notice that the oil is coming from the drain plug head (hex part? sorry not good with mechanical terms), as opposed to where the washer is. Also, I'm not sure if my eyes are playing tricks, but it almost looks like the flat part of the drain plug that sits against the washer is caved in, or concave.
Could it possibly be that I overtorqued the drain plug to cave it in, and that's the source of the leak? One of the photos shows where I've wiped the oil off, and the other photo shows the oil forming.
TLDR: Used new crush washer for first time changing oil. Think I may have overtorqued the drain plug. Oil appears to be originating from the middle part of the drain plug.
