Oil losses could threaten the performance of the engine. If leaking easy to know. So it looks complicated issue if oil shrinkage but no signs of leaking, though this question is easy.

Oil Engine

Making car engine longevity among others to maintain the volume of engine oil such as manufacturer’s recommendations, volume could be shrinking due to burning oil and leaking. Leaking known because there is oil spills under the car.

Looks complicated issue so if oil shrinkage but no signs of leaking. Though this problem is easy because of the loss of oil that burned in the engine was just passing through four ways. That is entered through the valve guides, piston rings, engine Ventilation system or on several machines break through leaks in the intake manifold gaskets.

Valve guides

Engine valve (valve) moves in the valve guides that are part of the cylinder head. There was a dash of oil on the valve guides are needed for lubricating moving components. There are oil seals to keep the incoming oil is not excessive. Excessive distance between the valve guides or seals and worn / damaged in the amount of oil allows more flow in through the guides and into the engine.

To find out if your vehicle has this problem, it’s easy. That appears the smoke (from burning oil) so the car is turned on after the set aside for hours. Because silenced for hours, the oil has time to flow down through the guides and collected behind the valve. Once the machine is turned on, it immediately collected oil into the combustion chamber and burned the smoke is sent out. Stop and go driving patterns tend to cause more oil into the intake guides because the suction power of a larger intake manifold.

The first step of repair changed its valve seals. At the time of replacement, the mechanic can estimate the rate of wear of the valve guides. When the distance (clearance) guides too tenuous, the cylinder heads must be removed for repair.

Piston rings

Piston rings and cylinder walls are worn to give way oil into the combustion chamber. Oil was thrown into the walls of the cylinder from the crankshaft bearings, so large bearing clearances can ‘eat’ oil because more and more oil is thrown to the walls of the cylinder, more of which can be controlled by the piston rings. High rpm driving style also makes oil more thrown into the cylinder. So oil could be reduced even though the condition of the piston rings well. Oil slipped past the piston rings leaving a trail of smoke that comes out of exhaust when driving but do not generate smoke as the starter.

Although the engine compression tests able to diagnose the case but more visually suggested. Remove the spark plugs and use a small flashlight to check the top of the piston. Normal condition characterized by brown or black carbon layer at the top of the carbon. In contrast, the carbon layer at the edge of the piston.

Engine Ventilation System

Duty engine ventilation system removing hazardous vapors from the crankcase, this was done by pulling it through the PCV valve into the intake manifold where the smoke was burned again. If the PCV valve that is used rather than the allotment, it could be an oil mist into the combustion chamber inhaled participates. So be sure to use the correct PCV valve.

Intake manifold gasket leak

Oil also is lost due to the intake manifold gasket leak on a number of V6 and V8 engines that caused the oil into fuel chamber. Because the leak is located at the bottom of the intake manifold, so it’s hard to check. This problem is characterized by a bad spark plug on one cylinder due to the leak.

The important thing is not to the volume of oil below the limit recommended by the factory. When that happens, then you already have an idea of what to do.