ASTM D 6201:2025

1.1 This test method covers an engine dynamometer test procedure for evaluation of intake valve deposit formation of unleaded spark-ignition engine fuels. 2 This test method uses a Ford Ranger 2.3 L four-cylinder engine. This test method includes detailed information regarding the procedure, hardware, and operations. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.3 This test method is arranged as follows: Subject Section Scope 1 Referenced Documents 2 Terminology 3 Summary of Test Method 4 Significance and Use 5 Apparatus 6 Laboratory Facilities 6.1 Engine and Cylinder Head Build-Up and Measurement Area 6.1.1 Engine Operating Area 6.1.2 Fuel Injector Testing Area 6.1.3 Intake Valve Rinsing and Parts Cleaning Area 6.1.4 Parts Rating and Intake Valve Weighing Area 6.1.5 Test Stand Laboratory Equipment 6.2 Test Stand Configuration 6.2.1 Dynamometer Speed and Load Control System 6.2.2 Intake Air Supply System 6.2.3 Exhaust System 6.2.4 Fuel Supply System 6.2.5 Engine Control Calibration 6.2.6 Ignition System 6.2.7 Engine Coolant System 6.2.8 External Oil System 6.2.9 Temperature Measurement Equipment and Locations 6.2.10 Pressure Measurement Equipment and Locations 6.2.11 Flow Measurement Equipment and Locations 6.2.12 Speed and Load Measurement Equipment and Locations 6.2.13 Exhaust Emissions Measurement Equipment and Location 6.2.14 DPFE (EGR) Voltage Measurement Equipment and Location 6.2.15 Ignition Timing Measurement Equipment and Location 6.2.16 Test Engine Hardware 6.3 Test Engine Parts 6.3.1 New Parts Required 6.3.2 Reusable Engine Parts 6.3.3 Special Measurement and Assembly Equipment 6.4 Reagents and Materials 7 Hazards 8 Preparation of Apparatus 9 Test Stand Preparation 9.1 Engine Block Preparation 9.2 Preparation of Miscellaneous Engine Components 9.3 Cylinder Head Preparation 9.4 Cylinder Head Assembly 9.5 Cylinder Head Installation 9.6 Final Engine Assembly 9.7 Calibration 10 Instrumentation Calibration 10.1 Procedure ...

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