Why is the throttle oiled? Why is the intake tube lubricated What is the cause of oil entering the air intake?
The crankcase and the cylinder heads house the main components. These areas are connected and sealed from the outside. When the engine runs, high pressure in the pistons causes flammable gases through the piston rings to enter the crankcase. This is known as “blowing” .
Blowing is a common problem in older vehicles with long driving histories. Low mileage and new vehicles are unlikely to experience such a leak. Leakage can also be caused by worn piston rings in older cars. Blowing will quickly increase pressure in the crankcase if it isn’t ventilated. This will quickly lead to oil leakage from various seals and gaskets in the engine. These vapors contain tiny oil droplets suspended in the mixture of air and fuel.
Since the 1960s, automobile manufacturers have been using positive crankcase ventilation (PCV). The PCV system works by removing unburned gases from crankcases and returning them to the intake manifold for combustion if conditions are suitable. The PCV system sends these vapors to two areas: the intake pipe between the throttle body’s throttle body (the air filter) and the throttle body (the intake manifold).
The PCV valve regulates blowing flow rate in order to minimize the impact of the air-fuel mixture on the cylinders. Some cars have the PCV system pipes that open to the port on the filter. Problems with the PCV system can affect the lubrication and performance of the filter.
Except for the PCV connections at engine inlet, there is no other oil source that could accidentally enter the intake.
Causes of Throttle, Intake Manifold Lubrication
Check the PCV system for lubrication if it is visible in the air intake pipes upstream from the throttle body valve and the surrounding housing. If you notice a slight oily residue on the intake pipe, this is normal and should not be a concern. However, if your vehicle is spotted with oil or water puddles you should get it checked by a mechanic right away.
The PCV valve is the first thing to check if there is oil in either the throttle or intake manifold. An inoperative PCV valve can cause excessive system pressures, which force engine oil through the system pipe to the intake pipe. The throttle body and intake manifold are then affected. Extreme cases may result in excessive smoke coming out of your vehicle’s exhaust. OBD2-equipped vehicles will assign a fault code in this case. A problem with the PCV valve could cause codes like P053A or P053C, as well as P053E and P0171.
Blockages in the oil passages or pipes are the next reason oil can reach the intake manifold. Regular oil changes are necessary to prevent dirt from building up and clogging oil passageways. Engine oil can be forced into the intake tube or manifold if the system pipes are clogged during steering. Clogged pipes should be cleaned if this is suspected.
Engines that have traveled over 250 000 km can show signs of excessive blowing. An engine that blows can lead to a number of performance problems. Most common issues are irregular engine speeds, hard starting, reduced engine power, and fumes from exhaust. Rarely, oil can leak from the intake manifold and throttle body. In these cases, it is possible to repair the engine.
How serious is this problem?
This problem generally does not affect the engine’s ability to start. Excessive oil in the combustion chambers can lead to engine misfires, dirty spark plugs and excessive carbon buildup on the valves. This can also cause loss of engine power. This will result in decreased engine efficiency as well as increased fuel consumption.
How can oil be prevented from entering the Air Intake System
Proper operation of the PCV system is the only way to prevent engine oil from entering the intake, throttle body, and intake manifold. The PCV system must be kept clean and lasts a long time.
- Regularly change the oil filter and engine oil.
- Select a premium oil brand. To ensure maximum efficiency for all engine components, use 100% synthetic engine oils.
- – Change the air filter every other maintenance interval.
