Paris, May 27: Renault have revealed that they are to change their approach to Formula One engines for the 2004 season. They will reveal their new engine strategy on Tuesday - and could abandon their ground-breaking wide-angle engine. In 2001, Renault pioneered an engine with cylinder heads at a much wider angle than any other powerplant in F1. It has a vee-angle of around 110 degrees, when most engines in the sport are at about 90 degrees. But while it has advantages in improving the weight distribution and centre of gravity of the car, the team have struggled to generate enough power. In fact, Renault's engine is reputed to be the least powerful in F1, although they are still joint third place in the championship with Williams. The sport's rules are due to change next year. Engines will have to last an entire race weekend and manufacturers will have to make affordable engines available to all teams. Renault have already announced that engine expert Jean-Jacques His will be leaving at the end of the month. His told French sports newspaper l'Equipe that he was leaving after a disagreement with team boss Flavio Briatore about the future direction of the team. Renault have been linked with Mario Illien, the Swiss engineer who co-founded McLaren's Mercedes engine builders Ilmor. But Mercedes motorsport head Norbert Haug said that Briatore had told him that Renault had not approached Illien. Bureau Report