Kingsport Speedway has rescheduled the NASCAR Advance Auto Weekly Racing Series for Friday, April 16.A release from the racing venue says the race-car engines are water-cooled. This means running them at cold temperatures increases the likelihood of damage.“We have been working very hard and it is very disappointing to us as we work all winter and we are very excited to see everyone come race season, but mother nature is going to win this week,” said General Manager Karen Tunnell in the release.