The Greenfield Fire Territory participates in the Hancock County Technical Rescue Team. The Team was created to pool the resources of the Greenfield Fire Territory and the Sugar Creek Township Fire Department to enhance the response to technical rescue situations. The Greenfield Fire Territory is the busiest fire department in Hancock County, responding to more than 3400 emergency calls annually. Approximately 80% of those calls are emergency medical responses.
The US service manual states that the timing belt should be replaced at 72 months (6 years) or 90,000 miles. The vast majority of NSXs hit 6 years well before they are anywhere near 90k miles so many owners are wondering if they really need to change the belt at 6 years.
Cars and Automobiles with 540+ answers. In addition to Stan Hanks' excellent answer, I would advise changing a timing chain: 1  Every 80-100k miles if you haven't already.  When you purchase a used vehicle unless you have documented proof that this was done within 40-50k of your purchase.