The item labeled #16 in the illustration is a stack of spring washers. Their function is to __________.Illustration MO-0062

Correct Answer: Option B — maintain the same hold-down force on the injector regardless of varying engine operating temperatures

Stack spring washers (belleville washers) installed on fuel injector hold-down studs compensate for thermal expansion and contraction. They maintain a constant, uniform clamping force on the injector assembly across varying engine operating temperatures and cylinder firing pressures.