I am back in this thread...again.
Was loosing a 1/4" per 4-5k miles (year driving for me) from the overflow.
Looking back at my service notes, i first started thinking this HG deal had me.
After i did the water pump, 63,855miles on 1/21/2015.
I was still loosing coolant.
This last 6 months i have lost over 2" out of the overflow res.
Dumped a couple bottles of Steelseal in at 83,650 on 11/19/2019.
After a flush, did the directions on the bottle. Straight water and Steelseal then heat cycle.
Then a flush and regular antifreeze added last.
Bought this krazy UV flashlight... UV Beast v3.
Waved it around the engine bay... DAMN, NEON GLOWING antifreeze is all over, looks like the water pump... again.
Either i did a piss-poor job the first go or was a bad pump from the get go, seems unlikely.
I am going to dig into this over the next couple days.
I will add some UV pics, pretty amazing...