The timing belt is the toothed belt that keeps the crankshaft and camshaft spinning in exact relationship, so the valves open and close at precisely the right moment relative to the pistons. It's a wear item with a defined service life, which is why the manufacturer gives it a replacement interval in miles or years. Unlike many repairs, this is one you do before there's a problem — not after.
At New Concept, timing belt service is about doing it on schedule and doing it thoroughly. We follow the manufacturer's interval for your vehicle, replace the belt along with the tensioner and idlers that keep it tracking true, and set the timing marks precisely on reassembly. Because much of the labor is in the access, it's often the smart time to replace the water pump too — on many engines the pump sits behind the same cover.