The timing belt syncs the crankshaft and camshaft, opening and closing valves in time with the pistons’ strokes
and allowing fuel/air mixture and exhaust to enter or leave the cylinders. It's recommended to follow your
vehicle’s maintenance schedule and replace the timing belt and related parts on time to avoid problems. We offer
several timing belt kits that contain all the parts you need to complete the job.
What happens if your timing belt fails?
Older engines used a timing chain (and many still do), so timing belt replacement wasn't an issue. Timing
belts are a different story, though. They're a toothed, fabric-reinforced rubber belt like the serpentine
belt, and they will stretch over time and eventually break. Unlike the serpentine belt, the timing belt is
concealed behind a cover, and there's no way to check its condition (and no warning signs that it may be
about to fail).
Manufacturers recommend a timing belt service interval of usually 60K-80K miles, and anything past that
mileage interval is borrowed time. The timing belt is what connects the crankshaft and camshaft and syncs
them so the valves open and close in time with the piston strokes. The "compression area" when the piston is
at top dead center is pretty small, and some engines are designed with piston crowns that can accommodate
open valves if needed. Others, known as "interference engines," will crash the pistons into the open valves,
effectively causing catastrophic engine failure.
Don't take chances. If your timing belt needs to be changed, make sure to get it done. If you're buying a
used car with 75K or more miles on it, make sure the timing belt was changed before you buy.