The TMC Deposit Rating Manual is a resource for understanding the method, scales, definitions, and rating aids required for the evaluation of deposits on applicable hardware.



This Manual includes the following tabbed sections:

• Definitions

• Rating Environment

• Rating Procedure

• Sludge

• Varnish

• Rust

• Carbon

• Induction/Combustion System

• Two-Cycle System

• Piston Deposit Rating

• Engine Component Rating Methods

• Rating Scales