Olteanu was born on 6 January 1946 in
Bucharest, Romania and began playing junior-level football at local club Flacăra Roșie where he was teammates with
Rică Răducanu. Subsequently, he moved to
Dinamo București. At the end of his first season, the team reached the
1965 Cupa României final, but Mărdărescu did not use him in the eventual 2–1 loss to
Știința Cluj. He started playing in European competitions during the
1966–67 Inter-Cities Fairs Cup, appearing the entire match in a 2–0 win over
Sevilla. That would be his only appearance in the campaign as after they eliminated the Spaniards, they also got past
Toulouse, being defeated in the third round with 1–0 on aggregate by
Dinamo Zagreb who eventually won the competition. Olteanu helped Argeș win its first Divizia A title in the
1971–72 season, being used by coaches
Titus Ozon and
Florin Halagian in 20 games in which he scored once. Afterwards he played four games in the
1972–73 European Cup, eliminating
Aris Bonnevoie in the first round, then in the following one they won a home game with 2–1 against
Real Madrid, but lost the second leg with 3–1. On 15 June 1978, Olteanu made his last Divizia A appearance in a 5–0 home win over
UTA Arad in which he scored a goal, totaling 295 matches with eight goals scored in the competition and 10 games in European competitions (including five in the
Inter-Cities Fairs Cup). ==International career==