Getting ready to flush the DexCool out of my S2 L67 cooling system to switch to green. To be thorough, I want to drain the block too.
I have read posts about pulling the knock sensors, however when under the car today I noticed what looks to be drain plugs on each side of block.
It looks like a hex bolt head slightly recessed in a boss on the side of block.
Below are two cell phone pics looking up the front side of block from under the car.
Are these drain plugs for the block?
If so, how are they sealed (thread sealant, o-ring, copper washer)?