Engine Coolant Leak from Coolant Pump Drain Plug

Some vehicles in the VIN range defined above may experience an engine coolant leak from the engine coolant pump drain plug.

Damaged drain plug O-ring seal due to machining variation in pump housing or contamination of O-ring seal.

Replace coolant pump drain plug or coolant pump depending on coolant pump date code.

1. 1. Confirm that the source of the engine coolant leak is at the coolant pump drain plug.
2. Inspect the coolant pump date code stamped on lower mounting boss (as shown in Illustration) - (See Distributed Paper Copy for Photo)
3. If the date code stamped on the coolant pump is BETWEEN 08/28/02 and 09/21/02(inclusive), there may be a sharp edge on the sealing surface that could cut the O-ring. Replace coolant pump assembly using published service manual procedure.
4. If the date code stamped on the coolant pump is NOT BETWEEN 08/28/02 AND 09/21/02, the O-ring seal on the drain plug may be oversized due to contamination during manufacturing. Replace the coolant pump drain plug ONLY.

Important: Lubricate the drain plug O-ring seal with engine coolant prior to installation. The use of motor oil or other types of lubricants will cause the O-ring to swell which may lead to future leakage.

5. After repair, refill engine cooling system and pressure test to confirm repair.

24461382 - PUMP ASM - WAT

13105096 - PLUG ASM - ENG BLK COOL DRN HOLE

To receive credit for this repair during the warranty coverage period, submit a claim through the Saturn Dealer System for J3040 (Cock or Plug, Radiator Drain - Replace), or J3480 (Pump and/or Gasket, Coolant - Replace).