Els, ranked No. 3 in the world, had an eagle, three birdies and two bogeys on the second day of the Asian Tour event at the 7,047-yard Woo Jung Hills Country Club in Cheonan, south of Seoul.
Seeking his fourth title of the year, the South African is at 4-under-par 140 for the tournament, a shot behind Pilkadaris, who also shot 69 Friday. The Australian rolled in three long birdies, including a 50-footer on No. 17, his eighth hole of the day after starting on the 10th.
Els eagled the par-5 11th hole.
'My eight iron to 2 feet on 11 was my hole of the day. The drive was 340 yards, but it's downhill though,' Els said. 'I'm not John Daly!'
First round leader Hendrik Buhrmann of South Africa, shot a 74 to fall three back, tied with American Edward Loar.
Choi Sang-ho of South Korea shot a 72 and tied fifth place with amateur Kang Sung-hoon and Australian Richard Moir.
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