SAFARI

ENGINE 129 1 2 3 4 5 1 Radiator 2 Upper water cooling line 3 Auxilliary tank (coolant reservoir) 4 Thermostat 5 Water pump cap. Blow compressed air or oil/grease dissolved with water, through radiator fins from engine side to clean air passages. Do not brush or scrape radiator core in any way. Testing for leaks Remove radiator cap. Suitably plug radiator inlet, outlet and filling neck. Remove radiator drain cock adapter.With suitable adapter connect pressurized air supply to radiator drain cock hole. Submerge radiator in water tank. Admit air at 1.0 bar (max) into radiator. Check for leaks and if any suitably mark them. Take out radiator from water tank. Disconnect air supply connections. Remove all plugs. Rectify leaks by soldering, recheck radiator for leakage. Fit back radiator drain cock adapter. Fit back radiator cap. Instruction for soldering Cr-Br. Radiators Use 40% tin content solder. This solder has higher tin content and hence lower melting temperature than used in manufacture of radiator. Use of this will not have any effect on original soldering near by. Use non corrosive fluxes for soldering. Neutralize and wash residues to avoid any consequent damage. Acid should not be used for this purpose. DICOR Engine Pressure valve opening pressure 0.9+ 0.15 kg/cm2 (gauge) Vacuum valve opening pressure < 0.05 kg/cm2 Max. Checking cap Check radiator cap for perfect sealing in filler neck. Check radiator cap, main and vacuum valve opening pressures. Replace defective cap with new one of recommended rating. Test for main valve opening pressure. The radiator cap shall be tightened after filling in with water. The water inside the radiator is pressurized. Check that main valve opens at specified pressure of 1.0 kg/cm2 Radiator cap main valve should not open below the specified pressure value. On the vehicle, the functioning of radiator cap main valve can be checked by observing increase in coolant level in auxiliary tank at high coolant temperature. Test for vacuum valve opening The radiator cap shall be tightened without water inside the radiator and shall be connected to vacuum pump. Check that vacuum valve opens fully at 0.05 Kg /cm2 vacuum. On the vehicle, the functioning of the radiator cap vacuum valve can be checked by observing decrease in coolant level in an auxiliary tank when it cools down compared to higher level at high temperature.