MECHANICS R US - 25403 MISSION BLVD, HAYWARD CA 94544
 
90k
 
90 K Maintenance
The Famous Timing Belt..... newer engine design  incorporate  the use a  toothed belt to keep valve timing  in order  accomplish the 5 event 4 cycle  Otto cycle ( Intake , Compression,ignition,  Power , and Exhaust)  which makes it possible to transform energy from combustion to mechanical force .
 
valves bentMost Manufacturers recommend  replacing it at 90,000 miles in order to avoid serious mechanical damage to valve train in case of timing belt failure .
 In some vehicles the water pump is driven by the timing belt and it is recommended to replace at the same time , to assure it will last another 90,000 miles .
 
Hopefully you have kept up with the 30 and 60k maintenance and  it is not necessary to add these services  on top of the required schedule.
 
Common services are :
 
Timing belt tensioner , pulleys , seals
Water Pump
Drive Belt,
Ignition wires
Thermostat
Valve cover gasket
All checks performed at 30,000 miles