Yes, the Hemi 5.7 engine does have a timing chain. The timing chain is an important component of any internal combustion engine because it helps synchronize the movement of the crankshaft and camshaft so that your valves open and close at just the right time for maximum efficiency. As with most engines, there are two types of chains on the Hemi 5.7 - a primary one to drive the camshafts and a secondary one which drives accessories such as water pumps or power steering systems from the crankshaft pulley. Both these chains require regular maintenance in order to keep them running smoothly and efficiently; otherwise, you may end up with some serious engine damage down the line! Fortunately for owners of this popular motor, modern versions feature an improved design that reduces wear over time, meaning they shouldn't need replacing too often - although it is still advisable to schedule regular inspections with your mechanic just to be sure everything's working correctly.