[Dyna04]

I got to ride yesterday as it was the first sunny 50 degree day in months. So I got home after a 30 mile ride and decided I was over due drained all the fluids I noticed the 2 of my drain plugs were loose that was very disconcerting! I guess I will get them a little tighter this time. Maybe my torque wrench is off ?

 

[kballowe]

It happens. Check all the normal things. Sometimes the o-rings get damaged and you get an "off" torque reading.

 

[Dan89FLSTC]

A drain plug properly installed and torqued will not come loose...On anything.

Double check your torque wrench setting.

Inspect the threads on the plug.

It will be one of those mysteries that never gets solved...

 

[rizzo_mn]

I had something like this happen in the shop this week - next time look at the plug. I found the small shoulder at the base of the threads where the o ring sits, it seemed to allow the plug to thread in too far and the plug spun in the drain opening. A standard brass threaded plug (no O-ring) snugged up tight to the bottom of the drain opening. We've seen cases where the plug was overtightened and the threads were damaged, I suspect that might have been the case.