ASTM D2847 Standard Practice for Testing Engine Coolants in Car and Light Truck Service
10. Procedure
10.1 Test the coolant being evaluated in a minimum of five vehicles at the recommended concentration (typically 50 % antifreeze and 50 % water as recommended in Specifications D3306, D6210 but may be adjusted as agreed between customer and supplier).
10.2 Vehicle operating conditions may vary considerably in any test fleet. Record the type of service for each vehicle. Mileage accumulation rates may vary considerably. Therefore, the recommended inspections in 10.5 may be difficult to schedule. Alternative inspection and sampling schedules may be developed as agreed between customer and supplier.
10.3 All tests to determine the necessity of adding SCA or an extender should be logged as well as the addition of the SCA or an extender. Field testing can be done by using Test Strips.
10.4 Use water that complies with Specifications D3306, D6210 to dilute the antifreeze (field testing can be done with water quality test strips), and blend the test coolant. Additions to the cooling system during the test should be the prescribed mixture of 50 % coolant meeting Specifications D3306, D6210, and volumes added shall be recorded in the vehicle test log.
10.5 Perform periodic inspections throughout the test per minimum requirements as given in Table 1 or recommendations of OEM or agreed to by customers and supplier.
11. Inspection
11.1 Harvest three tubes from the top, center and bottom of the radiator. Open the tubes by removing one edge and "butterflying" the tube. Inspect and photograph the tubes. Record observations. As agreed between customer and supplier, a more extensive inspection and analysis may be performed on the radiator components.
11.2 Inspect, rate and photograph the water pump. Refer to Test Method D2809 for inspection and rating guidelines. Water pumps differ in construction and materials, so the exact procedures in Test Method D2809 may need to be adjusted as agreed between customer and supplier.
11.3 Harvest sections from the radiator and heater hoses. Open the hoses and spread the tubes to permit interior inspection. Inspect and photograph the hose materials. Record observations. As agreed between customer and supplier, a more extensive inspection and analysis may be performed on the hose components.
11.4 In heavy duty engines equipped with wet sleeve cylinder liners, the liners must be inspected for pitting corrosion, - Rated - Pass/Fail per agreement of customer and supplier.
11.5 Additional engine inspections may be performed as agreed between customer and supplier (water passages in block/heads, and thermostats/thermostat housing for rust/corrosion or deposits, or both).
