Exhaust Crossover Replacement. Buick GL7 (Export) 2000

For 1990-2009 cars

### Removal Procedure

1. Remove the throttle body air inlet duct. Refer to Air Filter Element Replacement in Engine Controls.
2. Drain the engine coolant from the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
3. Remove the inlet radiator hose from the engine. Refer to Radiator Inlet Hose Replacement in Engine Cooling.
4. Remove the thermostat bypass pipe. Refer to Thermostat Bypass Pipes Replacement in Engine Cooling.
5. Remove the exhaust crossover pipe heat shield bolts.
6. Remove the exhaust crossover pipe heat shield.
7. Remove the exhaust crossover pipe nuts.
8. Remove the exhaust crossover pipe.

### Installation Procedure

1. Install the exhaust crossover pipe.
2. Install the exhaust crossover pipe nuts.

Tighten
Tighten the exhaust crossover pipe nuts to 25 N·m (18 lb ft).

3. Install the exhaust crossover pipe heat shield.
4. Install the exhaust crossover pipe heat shield bolts.

Tighten
Tighten the exhaust crossover pipe heat shield bolts to 10 N·m (89 lb in).

5. Install the thermostat bypass pipe. Refer to Thermostat Bypass Pipes Replacement in Engine Cooling.
6. Install the inlet radiator hose to the engine. Refer to Radiator Inlet Hose Replacement in Engine Cooling.
7. Fill the cooling system with engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
8. Install the throttle body air inlet duct. Refer to Air Filter Element Replacement in Engine Controls.