5.1 This test method was developed to evaluate automotive engine oils for protection against oil thickening and engine wear during moderately high-speed, high-temperature service.
5.2 The increase in oil viscosity obtained in this test indicates the tendency of an oil to thicken because of oxidation. In automotive service, such thickening can cause oil pump starvation and resultant catastrophic engine failures.
5.3 The deposit ratings for an oil indicate the tendency for the formation of deposits throughout the engine, including those that can cause sticking of the piston rings in their grooves. This can be involved in the loss of compression pressures in the engine.
5.4 The camshaft and lifter wear values obtained in this test provide a measure of the anti-wear quality of an oil under conditions of high unit pressure mechanical contact.
5.5 The test method was developed to correlate with oils of known good and poor protection against oil thickening and engine wear. Specially formulated oils that produce less than desirable results with unleaded fuels were also used during the development of this test.
5.6 The Sequence IIIG engine oil test has replaced the Sequence IIIF test and can be used in specifications and classifications of engine lubricating oils, such as the following:
5.6.1 Specification D4485,
5.6.2 Military Specification MIL-PRF-2104, and
5.6.3 SAE Classification J183.
Область применения1.1 This test method covers an engine test procedure for evaluating automotive engine oils for certain high-temperature performance characteristics, including oil thickening, varnish deposition, oil consumption, as well as engine wear. Such oils include both single viscosity grade and multiviscosity grade oils that are used in both spark-ignition, gasoline-fueled engines, as well as in diesel engines.
1.1.1 Additionally, with nonmandatory supplemental requirements, a IIIGA Test (Mini Rotary Viscometer and Cold Cranking Simulator measurements), a IIIGVS Test (EOT viscosity increase measurement), or a IIIGB Test (phosphorous retention measurement) can be conducted. These supplemental test procedures are contained in Appendixes Appendix X1, Appendix X2, and Appendix X3, respectively.
Note 1: Companion test methods used to evaluate engine oil performance for specification requirements are discussed in SAE J304.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.2.1 Exception—Where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, and tubing size.
1.3 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 the applicability of regulatory limitations prior to use. Specific warning statements are provided in 6.14.1.1 and 7.1.
1.4 This test method is arranged as follows:
Section
Introduction
Scope
1
Referenced Documents
2
Terminology
3
Summary of Test Method
4
Significance and Use
5
Apparatus
6
Laboratory
6.1
Drawings
6.2
Specified Equipment
6.3
Test Engine
6.4
Engine Parts
6.4.1
Engine Speed and Load Control
6.5
Fluid Conditioning Module
6.6
Engine Cooling System
6.6.1
Flushing Tank
6.7
Coolant Mixing Tank
6.8
Condenser Cooling Systems
6.9
Engine Oil-Cooling System
6.10
Fuel System
6.11
Induction Air Supply Humidity, Temperature, and Pressure
6.12
Temperature Measurement
6.13
Thermocouple Location
6.13.1
Air-to-Fuel Ratio Determination
6.14
Injector Flow Testing
6.14.1
Exhaust and Exhaust Back Pressure Systems
6.15
Blowby Flow Rate Measurement
6.16
Pressure Measurement and Sensor Location
6.17
Reagents and Materials
7
Test Fuel
7.1
Engine and Condenser Coolant
7.2
Coolant Additive
7.3
Coolant Preparation
7.4
Pre-Test Cleaning Materials
7.5
Sealing and Anti-seize Compounds
7.6
Test Oil Sample Requirements
8
Preparation of Apparatus
9
Condenser Cleaning
9.1
Intake Manifold Cleaning
9.2
Cleaning of Engine Parts (other than the block and heads)
9.3
Connecting Rod Cleaning
9.4
Engine Block Cleaning
9.5
Cylinder Head Cleaning
9.6
Engine Build-up Procedure
9.7
General Information
9.7.1
Special Parts
9.7.2
Hardware Information
9.7.3
Fastener Torque Specifications and Torquing Procedures
9.7.4
Main Bearing Cap Bolts
9.7.4.1
Cylinder Head Bolts
9.7.4.2
Torques for Miscellaneous Bolts, Studs, and Nuts
9.7.4.3
Parts Replacement
9.8
Engine Block Preparation
9.9
Piston Fitting and Numbering
9.10
Piston Ring Fitting
9.10.1
Pre-Test Camshaft and Lifter Measurements
9.11
Camshaft Bearing Installation
9.12
Camshaft Installation
9.13
Main Bearings
9.14
Crankshaft Installation
9.14.1
Main Bearing Cap Installation
9.14.2
Crankshaft Sprocket
9.15
Camshaft Sprocket and Timing Chain
9.16
Crankshaft End Play
9.17
Piston Pin Installation
9.18
Piston Installation
9.18.1
Harmonic Balancer
9.19
Connecting Rod Bearings
9.20
Engine Front Cover
9.21
Coolant Inlet Adapter
9.22
Oil Dipstick Hole
9.23
Oil Pan
9.24
Cylinder Head Assembly
9.25
Adjustment of Valve Spring Loads
9.26
Cylinder Head Installation
9.27
Hydraulic Valve Lifters
9.28
Pushrods
9.29
Valve Train Loading
9.30
Intake Manifold
9.31
Rocker Covers
9.32
Water Inlet Adapter
9.33
Condenser
9.34
Coolant Outlet Adapter
9.35
Oil Filter Adapter
9.36
Oil Sample Valve
9.37
Ignition System
9.38
Throttle Body
9.39
Accessory Drive Units
9.40
Exhaust Manifolds, Water-Cooled
9.41
Engine Flywheel
9.42
Pressure Checking of Engine Coolant System
9.43
Lifting of Assembled Engines
9.44
Mounting the Engine on the Test Stand
9.45
External Cooling System Cleaning
9.46
Engine Coolant Jacket Cleaning (Flushing)
9.47
Coolant Charging
9.48
Test Oil Charging
9.49
Engine Oil Pump Priming
9.50
Calibration
10
Laboratory and Engine Test Stand Calibration
10.1
Testing of Reference Oils
10.2
Reference Oil Test Frequency
10.3
Reporting of Reference Oil Test Results
10.4
Evaluation of Reference Oil Test Results
10.5
Status of Non-Reference Oil Tests Relative to Reference
Oil Test
10.6
Status of Test Stands Used for Non-Standard Tests
10.7
Data Acquisition and Control
10.8
Sample Rate
10.8.1
Measurement Accuracy
10.8.2
Temperature
10.8.3
Pressure
10.8.4
Flow
10.8.5
Speed
10.8.6
Load
10.8.7
Measurement Resolution
10.8.8
System Time Response
10.8.9
Quality Index
10.8.10
Engine Operating Procedure
11
Dipstick and Hole Plug
11.1
Dipstick Hole O-ring
11.2
Engine Start-up and Shutdown Procedures
11.3
Start-up
11.4
Scheduled Shutdown
11.5
Non-Scheduled Shutdowns
11.6
Oil Sampling
11.7
Oil Leveling
11.8
Air-to-Fuel-Ratio Measurement and Control
11.9
Air-to-Fuel Ratio Verification
11.10
Blowby Flow Rate Measurement
11.11
NOx Determinations
11.12
Data Recording
11.13
Initial run (10 min)
11.14
Engine Oil Quality Testing (100 h)
11.15
Test Termination
11.16
Determination of Test Results
12
Engine Disassembly
12.2
Preparation of Parts for Rating of Sticking, Deposits,
and Plugging
12.3
Piston Deposit Rating
12.4
Post-Test Camshaft and Lifter Wear Measurements
12.5
Viscosity Test
12.6
Testing Oil Samples for Wear Metals
12.7
Blowby Flow Rate Measurements
12.8
Oil Consumption Computation
12.9
Photographs of Test Parts
12.10
Retention of Representative Test Parts
12.11
Severity Adjustments
12.12
Determination of Operational Validity
12.13
Report
13
Report Forms
13.1
Precision of Reported Units
13.2
Precision and Bias
14
Keywords
15
The Role of the ASTM Test Monitoring Center (TMC) and
the Calibration Program
Annex A1
Sequence IIIG Test Parts Replacement Guidelines
Annex A2
Sequence IIIG Determination Volume of Engine Oilin Pan
Annex A3
Sequence IIIG Test Fuel Analysis
Annex A4
Sequence IIIG Test Reporting
Annex A5
Sequence IIIG Test Air-to-Fuel Ratio Control Flow Chart
Annex A6
Sequence IIIG Test Set Points and Control States
Annex A7
Sequence IIIG Quality Index Upper and Lower Values
Annex A8
Sequence IIIG Engine Oil Level Worksheet
Annex A9
Blowby Flow Rate Determination
Annex A10
Safety Hazards
Annex A11
Sequence IIIG Blueprint Listing
Annex A12
Fluid Condition Module components
Annex A13
Engine Build Worksheets
Annex A14
Engine Oil Cooling System Schematic
Annex A15
Guidelines For Hardware Subject To First In – First Out Criteria
Annex A16
Sequence IIIGA Test Procedure
Appendix X1
Sequence IIIGVIS Test Procedure
Appendix X2
Sequence IIIGB Test Procedure
Appendix X3