For 1990-2009 cars only
- Fill the crankcase with the proper quantity and grade of engine oil.
- Fill the cooling system with the proper quantity and grade of coolant. Refer to Engine Cooling.
- Do not place pellets into a non-pressurized coolant recovery reservoir. On these systems, the pellets must be added to the radiator.
- The sealant pellets may leave a film on the sides of the pressurized and non-pressurized coolant recovery reservoirs. This film is normal.
- Crank the engine several times. Listen for any unusual noises or evidence that parts are binding.
- Start the engine and listen for unusual noises.
- Run the engine speed at about 1000 RPM until the engine is at operating temperature.
- Listen for sticking lifters and other unusual noises.
- Check for oil and coolant leaks while the engine is running.
Important: After overhaul, the engine should be tested before installation in the vehicle. If a suitable test stand is not available, the following procedure can be used after the engine is installed in the vehicle.
Important: If a new camshaft or valve lifters were installed, add Engine Oil Supplement GM P/N 1052367 or equivalent to the engine oil.
Important:
| • | Whenever the cooling system is serviced or drained for service procedures, 2 coolant sealant pellets, GM P/N 3634621 or equivalent, must be added to the cooling system. The pellets must be added to the radiator or the pressurized coolant reservoir. Pellets must be crushed prior to installation. |
| • | Do not place pellets into a non-pressurized coolant recovery reservoir. On these systems, the pellets must be added to the radiator. |
| • | The sealant pellets may leave a film on the sides of the pressurized and non-pressurized coolant recovery reservoirs. This film is normal. |
