Steam and scalding liquids from a hot cooling; system can blow out and burn you badly. They; are under pressure, and if you turn the radiator- Page 242

yellow

blue     

5-14

CAUTION:

Steam and scalding liquids from a hot cooling
system can blow out and burn you badly. They
are under pressure, and if you turn the radiator
pressure cap 

--

 even a little 

--

 they can come out

at high speed. Never turn the cap when the
cooling system, including the radiator pressure
cap, is hot. Wait for the cooling system and
radiator pressure cap to cool if you ever have to
turn the pressure cap.