For 1990-2009 cars

# Engine Cooling System Sealer Usage

Subject: | Information on Engine Cooling System Sealer Usage. Due to changes to Models affected and additional information, this bulletin, has been revised and supersedes bulletin 97-T-40, which should be discarded.

Models: | 1991-2002 Saturn Vehicles

### Purpose

The purpose of this bulletin is to provide revised recommendations concerning the use of Engine Cooling System Sealer in Saturn vehicles Containing DEX-COOL®.

Saturn Engine Cooling System Sealer (P/N 21007224) is compatible with both DEX-COOL® (orange) coolant and Ethylene Glycol (green) coolant.

Cooling System Sealer provides two primary benefits to the cooling system:

• | In engines using Ethylene Glycol (green) coolant, the sealer helps to clean deposits from the water pump seal preventing potential leaks and,

• | In engines using either Ethylene Glycol (green) coolant or DEX-COOL® (orange) coolant, the sealer prevents minor coolant leaks due to porosity in the cast aluminum cylinder head.

Whenever the engine cooling system is drained for maintenance or other repairs, add one 10-gram pellet of Engine Cooling System Sealer with the new engine coolant.

Vehicles designed and built to use DEX-COOL® (refer to table on next page) extended life coolant are equipped with specially designed cooling system components. These vehicles should only be serviced with DEX-COOL®. Vehicles built with ethylene glycol (refer to table on this page) should only be serviced with ethylene glycol coolant.

Notice: Mixing DEX-COOL® with ethylene glycol in a Saturn engine could result in damage to the engine and its cooling system components. If a Saturn vehicle, designed to use Saturn non-phosphate ethylene glycol (green) engine coolant is contaminated with DEX-COOL®, the engine cooling system must be drained, flushed with clean water refilled with Saturn ethylene glycol coolant.

The following table displays Saturn usage of engine coolant and cooling system sealer:

SATURN COOLANT AND SEALER USAGE
MODEL YEAR(S) | RANGE | PRODUCTION AND SERVICE COOLANT | PRODUCTION SEALER QUANTITY | SERVICE SEALER QUANTITY
1991-1993 | ALL | Ethylene Glycol (green) | None | 10grams
1994 | RZ100000-RZ320897
1994 | RZ32089-RZ999999 | 20 grams
1995 | ALL
1996 | TZ100000-TZ315013
1996 | TZ315014-TZ99999 | DEX-COOL® (orange)
1997 | TZ100000-VZ116724
1997 | VZ116725-VZ999999 | 8 grams
1998-2000 | ALL | None
2001 | IZ100000-IZ348617
2001 | IZ348616-IZ999999 | 10 grams
2002 | ALL