Acura 3.5 RL Manual page 91

Follow the Severe Conditions Maintenance Schedule if the vehicle is driven MAINLY under one or more of the Severe Driving Conditions (page 3-15):
*1: Do not adjust the gap, replace the spark plug if it is out of service limit.
*2: Replace the timing belt and timing balancer belt at 60,000 miles (U.S.) 100,000 km (Canada) if the vehicle regularly is driven in one or more of these conditions:
• In very high temperatures (over 110°F, 43°C).
• In very low temperatures (under -20°F, -29°C).
*3: Replace every 15,000 miles (24,000 km) if the vehicle is driven primarily in urban areas that have high concentrations of soot in the air from industry and diesel-powered vehi-
cles. Replace the air conditioning filter more often if air flow from the climate control system becomes less than usual.
8-4, 8-5
8-4, 10-5
11-153
4-22
6-8 to 6-13,
10-10
4-33, 17-15,
22-85
11-124
10-5
14-108
15-4
19-10, 19-11,
12, 17, 18,
19-19, 19-23
19-8
19-6
22-68
3-2, 3-3