Starting the engine after major repairs (VW Golf 4)

1. With the engine installed in the vehicle's engine compartment, check the engine oil and coolant levels.

2. Check that all previously removed wires and hoses are installed in their places.

3. Disconnect the electrical connector from the fuel pump.

4. Remove the spark plugs and disconnect the electrical connector from the ignition coil. Crank the engine with the starter until the oil pressure warning light goes out, then screw in the spark plugs and connect the electrical connectors to the ignition coil and fuel pump.

5. Start the engine. The engine may take longer than usual to start due to the fuel system being disconnected.

6. When the engine is idling, check for fuel, coolant, and oil leaks. At this stage of engine operation, there may be odor and smoke from hot engine parts as oil that got on the engine during assembly burns off.

7. Let the engine idle until the coolant is warm, which can be felt through the upper radiator hose. Then turn off the engine. After the engine has cooled, check the oil and coolant levels.

8. When installing new pistons, piston rings or crankshaft bearings in the engine, it is necessary to run the engine in for the first 800 km. Do not operate the engine with the throttle valve wide open or under heavy load at low engine speed.

9. It is recommended to change the oil and oil filter at the end of the break-in period.