Second rower Tomas Vallejos has warned Wales that Argentina intend to front up at the Millennium Stadium on Saturday.
The hosts have problems in the front row, including being without tighthead Adam Jones due to injury, for the clash with a Pumas side who always pride themselves on the power of their pack.
Interim Wales head coach Rob Howley has to decide whether to hand a debut to Ospreys' Aaron Jarvis, or he could switch loosehead Paul James.
"We have a massive belief in our scrum, it is one of the foundations of the team," Vallejos, who was called into the Argentina squad as a replacement for the injured Patricio Albacete, said.
"If Jones plays or not it will not change our approach. We will still believe in our scrum and it will play a massive part in the game for us and we know Jones has been a massive player at the top level."
Vallejos has recently moved to Wales with the Scarlets, so he has some insight as to what Argentina will face in Cardiff this weekend.
The 27-year-old has been impressed by the abilities of some of his new club colleagues, singling out winger George North for special praise.
He said: "George is a big player, the thing that surprised me is he is a massive guy and he is physical, but he also has skills and it makes him a very special player," he admitted.
"I will be telling some of our guys in the backline we need to keep a close eye on him."