Technician A says that cylinder block torque twist can be the result of high cylinder pressures. Technician B says that cylinder block torque twist can be the result of drivetrain forces outside of the engine. Who is correct?

Both technicians are correct, as each identifies a valid cause of cylinder block torque twist. High cylinder pressures can indeed lead to torque twist within the cylinder block. When combustion occurs, the rapid increase in pressure can exert significant forces on the cylinder walls and block, potentially causing deformation or twisting of the cylinder block.

Additionally, drivetrain forces originating from components such as the transmission, driveshaft, and differential can also contribute to torque twist. As the vehicle operates, the torque generated by the engine is transmitted through the drivetrain. If the drivetrain experiences stresses due to acceleration or deceleration, these forces can impact the engine block, leading to a similar twisting effect.

Understanding that both internal factors (like high cylinder pressure) and external factors (like drivetrain forces) can cause torque twist is crucial for technicians. Proper diagnostics and addressing both scenarios are important for engine performance and longevity.