Cape Town - The same Springbok front row will start together for the third time in succession in Saturday's series-deciding third Test against Ireland in Port Elizabeth.
Beast Mtawarira, Adriaan Strauss and Frans Malherbe have been given the scrummaging responsibilities once more as they look for the dominant performance against the Irish that has been absent from the series so far.
"It’s work in progress. What we need to understand is that there will always be small little tricks at scrum time," said Coetzee.
"Every international team will come up with something when they’re under a bit of pressure.
"With Beast, Adriaan and Frans it’s a new combination and they’ve got to get used to each other. The more they scrum together the better they will become."
Coetzee added that while he had been encouraged by what he had seen from the Bok scrum so far in the series.
"I’m pleased with the scrums on our ball; we really had some solid platforms for our backs to launch attack from," he said.
"It’s just on their ball where we sometimes get caught out but we’ve looked at that, and hopefully we get that right this weekend."
Saturday's match kicks off at 17:00.
Teams:
South Africa
15 Willie le Roux, 14 JP Pietersen, 13 Lionel Mapoe, 12 Damian de Allende, 11 Ruan Combrinck, 10 Elton Jantjies, 9 Faf de Klerk, 8 Warren Whiteley, 7 Siya Kolisi, 6 Francois Louw, 5 Pieter-Steph du Toit, 4 Eben Etzebeth, 3 Frans Malherbe, 2 Adriaan Strauss (captain), 1 Tendai Mtawarira
Substitutes: 16 Bongi Mbonambi, 17 Steven Kitshoff, 18 Julian Redelinghuys, 19 Franco Mostert, 20 Jaco Kriel, 21 Rudy Paige, 22 Morne Steyn, 23 Lwazi Mvovo
Ireland
15 Tiernan O'Halloran, 14 Andrew Trimble, 13 Luke Marshall, 12 Stuart Olding, 11 Keith Earls, 10 Paddy Jackson, 9 Conor Murray, 8 Jamie Heaslip, 7 Jordi Murphy, 6 CJ Stander, 5 Devin Toner, 4 Iain Henderson, 3 Mike Ross, 2 Rory Best (captain) 1 Jack McGrath
Substitutes: 16 Sean Cronin, 17 Finlay Bealham, 18 Tadhg Furlong, 19 Ultan Dillane, 20 Rhys Ruddock, 21 Eoin Morgan 22 Ian Madigan, 23 Matt Healy