Coolant Line/Hose: Service and Repair

Engine Coolant Crossover Pipe Replacement (LZ4-3.5L)

Removal Procedure





1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (With LAT-2.4L) (Service and Repair)Battery Negative Cable Disconnection and Connection (Without LAT-2.4L) (Service and Repair) .
2. Remove the battery. Refer to Battery Replacement (Without LAT-2.4L) (Battery Replacement)Battery Replacement (With LAT-2.4L) (Battery Replacement) .
3. Drain the engine coolant. Refer to Cooling System Draining and Filling (Static Fill) (Service and Repair)Cooling System Draining and Filling (GE 47716 Fill) (Service and Repair) .
4. Disconnect the engine coolant temperature (ECT) sensor electrical connector .
5. Remove the ECT sensor.
6. Remove the radiator inlet and outlet hoses from the crossover pipe.
7. Disconnect the wiring harness ground terminal from the crossover pipe.




8. Remove the thermostat housing and thermostat from the crossover pipe.




9. Remove the crossover pipe bolts and crossover pipe.



Installation Procedure





1. Clean and dry the area before installing new seals.
2. Install the crossover pipe.

Notice: Refer to Fastener Notice (Fastener Notice) .

3. Install the crossover pipe bolts.

Tighten the crossover pipe bolts to 22 N.m (16 lb ft).

4. Install the thermostat and thermostat housing.

Tighten the thermostat housing bolts to 12 N.m (106 lb in).

5. Connect the coolant hoses at the crossover pipe.
6. Connect the wiring harness ground terminal to the crossover pipe.

Tighten the nut to 12 N.m (106 lb in).





7. Apply thread sealant (Saturn P/N 21485277) Loctite(TM) 242 threadlocker, or equivalent, to sensor threads.
8. Install the ECT sensor.

Tighten the ECT sensor to 18 N.m (13 lb ft).

9. Connect the ECT sensor harness connector. Push in the connector until a click is heard, then pull back to confirm a positive engagement.
10. Install the battery. Refer to Battery Replacement (Without LAT-2.4L) (Battery Replacement)Battery Replacement (With LAT-2.4L) (Battery Replacement) .
11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (With LAT-2.4L) (Service and Repair)Battery Negative Cable Disconnection and Connection (Without LAT-2.4L) (Service and Repair) .

Tighten the battery terminal bolt to 17 N.m (13 lb ft).

12. Fill the coolant. Refer to Cooling System Draining and Filling (Static Fill) (Service and Repair)Cooling System Draining and Filling (GE 47716 Fill) (Service and Repair) .