SAFARI

41 4 DLT ENGINE Pressure valve opening pressure 0.9 + 0.15 kg/cm 2 (gauge) Vacuum valve opening pressure < 0.05 kg/cm 2 Max Checking cap (Refer Figure 66) C heck radiator cap for perfect sealing in filler neck. C heck radiator cap, main and vacuum valve opening pressures. R eplace defective cap with new one of recommended rating. Test for main valve opening pressure. T he radiator cap shall be tightened after filling in with water. The water inside the radiator is pressurised. Check that main valve opens at specified pressure of 1.0 kg/cm 2 R adiator cap main valve should not open below the specified pressure value. O n 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 - T he 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/cm 2 vacuum. O n 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. Fig. 66 (VACUUM VALVE)