What are some common problems with Flathead V8 crane motors?

Some common problems with Flathead V8 crane motors include poor gas flow, low compression ratio and poor combustion chamber shape. These problems lead to low power output.

The side-valve layout forces intake and exhaust gases to flow through a tortuous route, with poor breathing or little volumetric efficiency. The engine tends to overheat since exhaust gases follow a complicated path. Side-valve engines operate safely at high speed, but the volumetric efficiency deteriorates swiftly; thus, high power output is not possible at speed.

A T-head engine is an improvement of the Flathead. It has crossflow layout, so exhaust gases and intake flows in the opposite directions, increasing the motor efficiency.