This information applies to 2009 vehicles with the following 4-cylinder engines:
- 2.0L RPO LNF
- 2.2L RPO LAP
- 2.2L RPO LE8
- 2.4L RPO LAT
- 2.4L RPO LE5
- 2.4L RPO LE9
A coolant loss may be observed in the water pump area, usually at PDI. The leak may be more prevalent with cold ambient temperatures.
1. Confirm coolant leak at the water pump-to-block interface.
2. Run the vehicle to operating temperature and let it cool. Repeat two times. Inspect the area for leakage.
- If the suspected leak has stopped, no further action is needed. Return the vehicle to service.
- If the concern is still present, continue to step 3.
CAUTION: Hot coolant could spray if the cap is fully removed.
3. Carefully loosen the coolant cap to relieve pressure. Tighten the cap after pressure relief.
4. Loosen the four bolts on the water pump (two on the front of engine, two on the rear of the pump) approximately one turn, but do not fully remove.
5. Torque the bolts to 25 Nm +/- 4 Nm (18.5 ft. lb. +/- 3 ft. lbs) in the following sequence: (Fig. 12)
(Fig. 12)
A. Top bolt on front of engine
B. Lower bolt on rear of water pump
C. Lower bolt on front of engine
D. Upper bolt on rear of water pump
TIP: A crow's foot wrench may be used where required to ensure the torque value is met.
6. Top the coolant in the surge tank to the cold full mark.
7. Clean and ensure all residual evidence of leaks is removed from the top and lower section of the water pump.
8. Pressure check and run the vehicle to operating temperature to check for coolant leak at the water pump-to-block joint. Let the vehicle cool and heat cycle two additional times.
- If the suspected leak has stopped, no further action is needed. Return the vehicle to service.
- If a leak is still present from the O-ring area after the re-torque of the water pump, replace the water pump O-ring. Be sure to follow the sequential torque procedure listed above when replacing the O-ring.
- Thanks to Jeff Gorenflo
- 2.0L RPO LNF
- 2.2L RPO LAP
- 2.2L RPO LE8
- 2.4L RPO LAT
- 2.4L RPO LE5
- 2.4L RPO LE9
A coolant loss may be observed in the water pump area, usually at PDI. The leak may be more prevalent with cold ambient temperatures.
1. Confirm coolant leak at the water pump-to-block interface.
2. Run the vehicle to operating temperature and let it cool. Repeat two times. Inspect the area for leakage.
- If the suspected leak has stopped, no further action is needed. Return the vehicle to service.
- If the concern is still present, continue to step 3.
CAUTION: Hot coolant could spray if the cap is fully removed.
3. Carefully loosen the coolant cap to relieve pressure. Tighten the cap after pressure relief.
4. Loosen the four bolts on the water pump (two on the front of engine, two on the rear of the pump) approximately one turn, but do not fully remove.
5. Torque the bolts to 25 Nm +/- 4 Nm (18.5 ft. lb. +/- 3 ft. lbs) in the following sequence: (Fig. 12)
(Fig. 12)
A. Top bolt on front of engine
B. Lower bolt on rear of water pump
C. Lower bolt on front of engine
D. Upper bolt on rear of water pump
TIP: A crow's foot wrench may be used where required to ensure the torque value is met.
6. Top the coolant in the surge tank to the cold full mark.
7. Clean and ensure all residual evidence of leaks is removed from the top and lower section of the water pump.
8. Pressure check and run the vehicle to operating temperature to check for coolant leak at the water pump-to-block joint. Let the vehicle cool and heat cycle two additional times.
- If the suspected leak has stopped, no further action is needed. Return the vehicle to service.
- If a leak is still present from the O-ring area after the re-torque of the water pump, replace the water pump O-ring. Be sure to follow the sequential torque procedure listed above when replacing the O-ring.
- Thanks to Jeff Gorenflo
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