ASTM D7320-12a

Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IIIG, Spark-Ignition Engine (Includes all amendments And changes 10/10/2013).

Automatically translated name:

Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IIIG, Spark-Ignition Engine

STANDARD published on 1.11.2012

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The information about the standard:

Designation standards: ASTM D7320-12a
Note: WITHDRAWN
Publication date standards: 1.11.2012
SKU: NS-38177
The number of pages: 50
Approximate weight : 150 g (0.33 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Annotation of standard text ASTM D7320-12a :

Keywords:

cam and lifter wear, deposits, engine oil, engine wear, high-temperature performance, oil consumption, oil thickening, oil viscosity, oxidation resistance, Sequence IIIG test, spark-ignition automotive engine, varnish, varnish deposition, ICS Number Code 75.100 (Lubricants, industrial oils and related products)

Additional information

Significance and Use

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.

1. Scope

1.1 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.

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. 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

Sequence IIIG Test Parts Replacement Guidelines

Sequence IIIG Determination Volume of Engine Oilin Pan

Sequence IIIG Test Fuel Analysis

Sequence IIIG Test Reporting

Sequence IIIG Test Air-to-Fuel Ratio Control Flow Chart

Sequence IIIG Test Set Points and Control States

Sequence IIIG Quality Index Upper and Lower Values

Sequence IIIG Engine Oil Level Worksheet

Blowby Flow Rate Determination

Safety Hazards

Sequence IIIG Blueprint Listing

Fluid Condition Module components

Engine Build Worksheets

Engine Oil Cooling System Schematic

Guidelines For Hardware Subject To First In – First Out Criteria

Sequence IIIGA Test Procedure

Sequence IIIGVIS Test Procedure

Sequence IIIGB Test Procedure

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