According to the manufacturer's recommendation, the coolant should be replaced after 6 years of operation or 90 thousand kilometers, whichever comes first

An external sign of wear on the valve stem seals is the short-term appearance of blue smoke from the exhaust pipe after starting the engine, as well as when braking the engine after a long drive under load

The brake drum is removed to replace it if the working surface is damaged or worn (the maximum allowable diameter of the drum of a car with a 1.4 liter engine is 181.25 mm, with a 1.6 liter engine - 204.45 mm), as well as for control state of brake mechanisms, replacement of brake pads and working cylinders

On a Renault Logan car, the interior heating and ventilation system is controlled independently from the air conditioning system when performing the function of heating and ventilating the interior, removing frost and condensed moisture from the windshield, as well as blowing the door windows

If the oil leak from under the cylinder head cover could not be eliminated by tightening the cover bolts, replace its gasket