Although better materials and manufacturing technology have extended the timing belt replacement intervals on many nameplates, timing belt replacements remain one of the most profitable scheduled maintenance services. They continue to be profitable because many other scheduled services like spark plug replacements, filter replacements, coolant changes and transmission fluid changes can be packaged with a timing belt replacement. In addition, many related parts such as belt tensioner and idler pulleys, water pumps, accessory drive belts and radiator hoses can be sold along with the timing belt replacement.

Because many import owners now understand that major engine damage may occur if timing belt replacement is postponed or neglected, timing belt replacements and related services are easier to sell. Most belt replacements have become a "do-it-for-me" service because the tooling and skill requirements are well beyond those of many amateur mechanics.

REPLACEMENT INTERVALS
Although the traditional recommended timing belt replacement interval has been 60,000 miles for many years, the use of modern materials and technology has extended timing belt replacement intervals on many nameplates well past the 100,000-mile mark. Some import manufacturers now recommend inspecting timing belts at specific intervals, in contrast to those recommending scheduled belt replacements. In these cases, the recommendation is to inspect the b...