. SAFETY GENERAL PRECAUTIONS PREVENTION OF BURNS the cap or plug. 2 - 14 Hot T hen hecking or draining the coolant, wait for the wate r to cool t o a emperature where it is possible to touch th e r adiato r cap by and before starting the operation. Even whe n the coolant has ooled down, loosen th e cap slowly to reliev pressure nside the radiator befor Hot T when checking raining the oil, wait for the oil to cool to a temperature wher e it possible to touch the cap or plug by hand before starting the peration. Even when t r plug slowly to relieve he oil has cooled down, loose the internal pressure before r n the cap emoving