- Check of engine operation by listening
- Check of the engine oil level
- Check of the system of engine and the vehicle with the tester
- Check of the cylinder head covers and gaskets
- Check of the valve clearance and adjustment, if needed
- Check of the alternator V-belt for tensioning (tensioning, if needed) and air-conditioning blower
- Check of the exhaust tract for leaks, turbocharger mounting, tightening the exhaust pipe fastening nuts