Scope
1.1 This test method coves an engine dynamometer test procedure for evaluation of intake valve deposit formation of unleaded spark-ignition engine fuels. This test uses a Ford Ranger 2.3 L four-cylinder engine. The following details the procedure, hardware, and operations used for this test.
1.2 The ASTM Test Monitoring Center (TMC) is responsible for engine test stand certification as well as issuance of information letters after test method modifications are approved by Subcommittee D02.A and Committee D02. Users of this test method shall request copies of recent information letters from the TMC to ensure proper conduct of the test method.
1.3 The values stated in SI units are to be regarded as the standard. Approximate inch-pound units are shown in parenthesis for information.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine applicability of regulatory limitations prior to use. Specific precautionary statements are given throughout this test method.
1.4 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 |
| Test Stand Laboratory Equipment | 6.2 |
| Test Engine Hardware | 6.3 |
| Special Measurement and Assembly Equipment | 6.4 |
| Reagents and Materials | 7 |
| Fuel | 7.1 |
| Engine Oil and Assembly Lubricant | 7.2 |
| Engine Coolant | 7.3 |
| Solvents and Cleaners | 7.4 |
| Fuel Injector Test Fluid | 7.5 |
| Valve Lapping Compound | 7.6 |
| Crushed Walnut Shells | 7.7 |
| Desiccant | 7.8 |
| Hazards | 8 |
| Specific Hazards | 8.1 |
| Reference Fuel | 9 |
| Reference Base Fuel Batch Approval Process | 9.1 |
| Fuel Batch Analyses | 9.2 |
| Fuel Batch Shipment and Storage | 9.3 |
| Preparation of Apparatus | 10 |
| Test Stand Preparation | 10.1 |
| Engine Block Preparation | 10.2 |
| Preparation of Miscellaneous Engine Components | 10.3 |
| Cylinder Head Preparation | 10.4 |
| Cylinder Head Assembly | 10.5 |
| Cylinder Head Installation | 10.6 |
| Final Engine Assembly | 10.7 |
| Calibration | 11 |
| Test Stand Calibration | 11.1 |
| Instrumentation Calibration | 11.2 |
| Test Procedure | 12 |
| Pretest Procedure | 12.1 |
| Engine Operating Procedure | 12.2 |
| Periodic Measurements and Functions | 12.3 |
| End of Test Procedures | 12.4 |
| Determination of Test Results | 13 |
| Post-test Intake Valve Weighing Procedure | 13.1 |
| Photographs of Parts - General | 13.2 |
| Induction System Rating | 13.3 |
| Determination of Test Validity - Engine Conformance | 13.4 |
| Final Test Report | 14 |
| Standard Report | 14.1 |
| Data Acquisition Summary Report | 14.2 |
| Photographs of Specific Parts | 14.3 |
| Precision and Bias | 15 |
| Precision | 15.1 |
| Bias | 15.2 |
| Keywords | 16 |
| Annexes | |
| Detailed Specifications and Photographs of Apparatus | Annex A1 |
| Engine Part Number Listing | Annex A2 |
