I went to the dealership the other day and purchased a new oem drain plug and the ring that goes with it for my brat. I go to looking at the ring and am wondering which side goes flush with the oil pan? The ring looks to have a flag side and a rolled side.

What... Theres a ring there??

 

Nah, I think it goes flat side to pan.

What... Theres a ring there??

 

Nah, I think it goes flat side to pan.

 

Thats how I always install mine..flat to the pan..and I change them every 3 oil changes.

we (Subaru dealership) always put the flat side against the flat on the drain plug, but really it doesn't matter a whole lot, as both the plug and the pan have a flat surface that the ring is crushed between. the correct torque specification for the drainplug is about 30 ft/lb, which turns out to be just a tiny tiny bit past where the crushing ends (you can feel the crushing happening, then it suddenly gets tighter...only a tiny bit beyond that)

~Erik~

Beveled side to the pan - as said above. I do the same on our Brat and copper gaskets on our Nissan drain plugs.

Iv'e always gone with flat to pan never had a leak, 7 ea82's

I went to the dealership the other day and purchased a new oem drain plug and the ring that goes with it for my brat. I go to looking at the ring and am wondering which side goes flush with the oil pan? The ring looks to have a flag side and a rolled side.

 

I don't worry abut the ring at all, or ever replace them. Instead I put some high-temp grease on the plug threads. Never have a leak. Same on the rubber gasket on the oil filter.