1998 Oldsmobile Cutlass Owner's Manual - Page 203

How to Add Coolant to the Coolant Surge Tank If you haven't found a problem yet, but coolant level the isn't at FULL COLD mark or slightly higher, add a 50/50 mixture of clean water (preferably distilled) and DEX-COOL' coolant atthe coolant surge tank, but be sure the cooling system, including coolant surge tank the it. pressure cap, is cool before you do (See "Engine Coolant'' in the Index for more infomation.) I Steam and scaldmg liquids from a hot cooling system can blow and burnyou badly. They out are under pressure, and if you turn the coolant surge tank pressure cap even a little they can come out at high speed. Never turn the cap when the cooling system, including coolant the surge tank pressure cap, is hot. Wait the for cooling systemand coolant surge tank pressure turn the cap tocool if you ever have to pressure cap. -- -- 5-17