1、FORD LABORATORY TEST METHOD BL 002-01 Date 2001 08 20 1992 05 21 ENGINE TEST FOR COOLANTS Action Revisions Revised Editorial - no technical change A. Cockman Ap p I i cat i on This test is used to determine the suitability of coolants for use in brass automotive cooling radiators. The procedure is u
2、sed as a qualification test for new formulations based on an evaluation of corrosion protection, inhibitor life and solution stability. Apparat us Req ui red The test shall be run using a Ford “5.0 liter“ (302 CID) OHV eight cylinder engine, equipped with an aluminum water outlet. Corrosion shall be
3、 evaluated using ASTM Corrosion Test Metal Coupons (ASTM D 1384) or equivalent. An induction dynamometer, or equivalent, with suitable controls, indicators and records to operate and control the test shall be used. The test radiator is immersed in a cooling tank and the engine coolant is maintained
4、at the proper temperature by controlling the flow of water in the cooling tank. A holder located between the supply tank and the radiator, to hold the corrosion test coupons, shall be electrically grounded to the engine block and radiator to eliminate differences in potential between these parts. Co
5、nditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 OC and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. Test Procedure Prepara
6、tion of Engine Due to the length and severity of the test and the desire to insure against coolant leakage, it is recommended that the cylinder heads, water pump, intake manifold and water outlet be removed from the new engine. Clean all mating surfaces and install new gaskets, using a gasket sealer
7、 on all surfaces. It is also recommended that tangential screw-type clamps be used to insure against leakage at hose connections. The cooling system is cleaned prior to each test. Kerosene, isopropanol and hot water flushes are used followed by an oxalic acid cooling system cleaner and neutralizer.
8、(See Appendix 1) This sequence is repeated, if necessary, to obtain a clean system. FORD LABORATORY TEST METHOD BL 002-01 Operating Conditions The engine components shall be assembled to provide a complete system with the coolant circulating through the block and radiator. The coolant shall be sampl
9、ed periodically to determine its stability. Test coupons shall be removed and evaluated at the intervals specified. Periodic checks and additions of specified coolant mixture should be made to insure normal operating level and minimum air content in the cooling system. This equilibrium is indicated
10、when the engine, after each restart, ejects through the overflow tube a small amount of excess coolant, which is collected and returned to the system at the next stop and restart interval. The following test conditions shall be maintained: Radiator Coolant Concentration* Matching 5.0 liter (302 CID)
11、 production radiator As specified by material standard *Appendix II shows analysis of Detroit city water used for coolant dilution where specified. Engine Speed Engine Output Coolant Temperature Test Duration Coolant Sampling Coupon Evaluation Radiator Pressure Cap Thermostat Heater Fittings 2400 r.
12、p.m. 35 h.p. 85 +/- 2 OC, at water outlet connection As specified in the coolant material standard Each 100 h One set replaced each 100 h and two sets for duration of test 90 kPa for downflow radiator; 11 O kPa for crossflow radiator Modified to provide flow restriction equivalent to wide open flow
13、Inlet and discharge completely blocked off All coupon holders are to be electrically grounded to both engine block and radiator. Evaluation of Coolant The effectiveness of the coolant shall be judged by examination of the coolant samples, the corrosion of the test coupons and by the corrosion or act
14、ual failure of the cooling system components. Coolant Samples 60 mL coolant samples shall be taken and checked at the intervals specified during and at the completion of the test. The specific gravity, pH and reserve alkalinity should be determined. Page 2 of 5 Copyright O 2001, Ford Global Technolo
15、gies, Inc FORD LABORATORY TEST METHOD BL 002-01 Test Coupons The test coupons shall be prepared and mounted and subsequently cleaned and weighed according to the applicable FLTM BL 001-01. The weight changes and presence of pitting should be determined. Note: Solder coupons are not to be cleaned wit
16、h a brush. Use fingers and pumice only. Engine Components The visible engine areas shall be inspected for evidence of corrosion or sediment. The aluminum water outlet shall be weighed before and after the test to determine any weight loss and evaluated for any visible evidence of corrosion or attack
17、. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. Page 3 of 5 Copyright O 2001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BL 002-01 1. 2. 3.
18、4. 5. 6. 7. 8. 9. 1 o. 11. 12. 13. 14. ENGINE TEST FOR COOLANTS APPENDIX I Engine Cooling System Cleaning Procedure Drain cooling system. Remove the thermostat. Fill system with kerosene. Run 1 h at 71 OC. Drain. Reverse flush with water for 15 minutes. Drain. Fill with concentrated isopropanol. Run
19、 1 h at 71 OC. Drain Reverse flush with water for 15 minutes. Drain. Fill with 10 % solution of oxalic acid cooling sysem cleaner and tap water (100 g/L H20). Run 1 h at 82 OC. Drain. Reverse flush with water for 15 minutes. Drain. Fill with 5 % solution of oxalic acid cleaner neutralizer (sodium ca
20、rbonate) and tap water (0.45 kg/9.5 L H20). Run 10 minutes at 82 OC. Drain. Reverse flush with water for 15 minutes. Drain. Fill with tap water. Run 30 minutes at 82 OC. Drain. Reverse flush with water for 15 minutes. Drain. Fill with tap water. Run 30 minutes at 82 OC. Draw off approximately 90 mL
21、sample from cylinder block drain cock. If sample indicates visible rust, repeat Steps 11 and 12. Cool sample and add approximately 3.0 mL of a saturated solution of calcium chloride (Reagent grade). Let stand 5 minutes and compare with a similar sample of tap water. If a light precipitate or turbidi
22、ty is noticeable, indicating the presence of calcium oxalate formed from residual oxalate radical content in the cooling system, repeat Steps 11 and 12. Completely drain by opening all drain cocks and blowing air through the system. Replace all rubber connecting hoses. Page 4 of 5 Copyright O 2001,
23、Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BL 002-01 ENGINE TEST FOR COOLANTS APPENDIX II Average Analysis of Detroit City Water Total Solids Bicarbonates (HC03) Chlorides (Ci) Sulfates (SO4) Silicates (Sioz) Iron (Fe) Calcium (Ca) Magnesium (Mg) Langelier Index at 71 OC Ph 125 ppm 46 PPm 8 PPm 17 PPm 0.5 ppm 0.02 ppm 27 PPm 7 PPm +/- 0.16 7.5 +/- 0.3 Page 5 of 5 Copyright O 2001, Ford Global Technologies, Inc
