Hemi engines are a type of piston engine with hemispherical combustion chambers. They are usually built with large displacements and higher than average compression ratios, making them powerful and efficient. However, this design also makes them more susceptible to interference.
Interference occurs when the pistons in an engine come too close to each other during their operating cycle. This can happen if the timing belt or chain stretches or breaks, causing the valves and pistons to collide. The results can be catastrophic, leading to bent valves, damaged pistons and even engine failure.
Hemi engines are more likely to experience interference than other types of engines because of their design. The best way to avoid this problem is to regularly check the condition of your timing belt or chain and replace it before it gets too stretched or worn out. You should also have your engine checked by a mechanic periodically to make sure everything is in good working order.