2007 Chevrolet Cobalt Owner's Manual - Page 311
2007 Chevrolet Cobalt Manual
Page 311 highlights
4. With the coolant surge tank pressure cap off, start the engine and let it run until you can feel the upper radiator hose getting hot. Watch out for the engine cooling fan. By this time, the coolant level inside the coolant surge tank may be lower. If the level is lower than the COLD FILL line, add more of the proper mixture to the coolant surge tank until the level reaches the COLD FILL line. 5. Then replace the pressure cap. Be sure the pressure cap is hand-tight and fully seated. See your dealer, if necessary. 2.0L L4 Supercharged Engine If no coolant is visible in the coolant surge tank, you will need to either see your dealer or refer to the Dealer Service Manual for a special coolant service fill procedure to ensure enough coolant is added. To purchase a service manual, see Service Publications Ordering Information on page 429. 311
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