ParkAvenue 1997-1999

Coolant Recommendation & Level Check

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Specific to:

Buick LeSabre 1986-1999

Buick Park Avenue 1996-1999

Oldsmobile 88 1992-1999

Oldsmobile Delta 88 1986-1988

Oldsmobile LSS 1996-1999

Pontiac Bonneville 1987-1999


WARNING
For 1996-99 vehicles, when adding coolant, it is important that you use DEX-COOL®, an orange colored, silicate-free coolant meeting GM specifications 6277M. If silicated coolant is added to the system, premature engine, heater core or radiator corrosion may result.

The cooling system should be inspected, flushed and refilled with fresh coolant at least every 30,000 miles (48,000 km) or 24 months. If the coolant is left in the system too long, it loses its ability to prevent rust and corrosion.

When the coolant is being replaced, use a good quality antifreeze that is safe to be used with aluminum cooling system components. The ratio of antifreeze to water should always be a 50/50 mixture. This ratio will ensure the proper balance of cooling ability, corrosion protection and antifreeze protection. At this ratio, the antifreeze protection should be good to -2°F (-37°C). If greater antifreeze protection is needed, the ratio should not exceed 70% antifreeze to 30% water.

Specific to:

Buick LeSabre 1986-1999

Buick Park Avenue 1996-1999

Oldsmobile 88 1992-1999

Oldsmobile Delta 88 1986-1988

Oldsmobile LSS 1996-1999

Pontiac Bonneville 1987-1999

When checking the coolant level, the radiator cap need not be removed. Simply check the coolant level in the recovery bottle or surge tank.



Click image to see an enlarged view

Fig. On many vehicles, the coolant recovery reservoir is mounted on the fenderwell, near the battery

Check the coolant level in the recovery bottle or surge tank, usually mounted on the inner fender. With the engine cold, the coolant level should be at the FULL COLD or between the FULL HOT and ADD level. With the engine at normal operating temperature, the coolant level should be at the FULL HOT or HOT mark. Only add coolant to the recovery bottle or surge tank as necessary to bring the system up to a proper level.



Click image to see an enlarged view

Fig. Coolant level should be between the FULL HOT (A) and ADD (B) marks, depending upon the temperature


CAUTION
Should it be necessary to remove the radiator cap, make sure the system has had time to cool, thereby reducing the internal pressure.

On any vehicle that is not equipped with a coolant recovery bottle or surge tank, the level must be checked by removing the radiator cap. This should only be done when the cooling system has had time to sufficiently cool after the engine has been run. The coolant level should be within 2 in. (51mm) of the base of the radiator filler neck. If necessary, coolant can then be added directly to the radiator.

 
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