Regal V6-3.8L VIN K (1997)
Coolant: Testing and Inspection
Checking the Coolant
As shown on the coolant overflow hose visual indicator, the reservoir cap should be removed to check coolant level. Check the coolant level in the
recovery reservoir every time the hood is up and the engine coolant is cold. The level should be near the "COLD" mark when the system is cold. At
normal operating temperature, the coolant level should rise. Coolant should be added only to the recovery reservoir to raise level to the "COLD" mark.
While draining the system, check the color of the coolant. If the coolant shows an unusual amount of oil sediment (gray, white, or foamy appearance),
engine oil may be leaking into the cooling system. A coating of oil on the inside of the coolant passages cuts down the efficiency of the system and may
cause engine overheating. Also, a leak in the cooling system may cause coolant to flow into oil passages, contaminating the lubricant and damaging the
engine. Check oil condition and level. See Engine. If pressure in the cooling system is too low, or if the coolant does not contain ethylene glycol
antifreeze, the coolant will boil. Pure water could boil at 119°C (247°F) even with a 124 kPa (18 psi) in the cooling system. Pure water lacks the
necessary rust inhibitors and water pump lubricant. The engine should never be operated without the pressure cap, or with the cap loose, unless
performing work on the cooling system.
