What Causes Valve Cover Oil Leaks?

1 Answers
DelAlexa
07/30/25 8:44am
The main reasons for valve cover oil leaks are: 1. The valve cover gasket has aged and become brittle, losing its sealing ability and causing oil leakage. In this case, simply open the valve cover and replace the gasket. 2. A clogged PCV valve in the crankcase ventilation system leads to excessive internal pressure, eventually causing oil to seep out under pressure. To check if the PCV valve is functioning properly: at idle speed, use your finger to test the vacuum at the crankcase air intake to instantly determine the PCV valve's working condition. Additional information: The cylinder head cover, commonly referred to as the valve cover, is used to seal components like the valve train, preventing dust from contaminating the oil or entering and accelerating wear on valve train components.
Was this review help?
20
2
Share
More Forum Discussions

How often should the spark plugs be replaced on an A4?

Typically, the spark plugs in an Audi A4 need to be replaced every 40,000 to 60,000 kilometers. How spark plugs work: Under high voltage, the air between the center electrode and the side electrode of the spark plug rapidly ionizes, igniting the air-fuel mixture in the engine's combustion chamber. Steps for replacing spark plugs: Open the hood, lift the plastic engine cover, remove the high-voltage ignition wires, and mark each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. While removing them, check for any external debris like leaves or dust and ensure everything is cleaned thoroughly. Place the new spark plugs into the spark plug holes, hand-tighten them a few turns, and then use the socket to tighten them further. Reinstall the high-voltage ignition wires in the correct firing order, then reattach the cover.
5
3
Share

How Often Should a Volkswagen Vehicle Undergo Its First Maintenance?

Volkswagen vehicles typically require their first maintenance between 3,000 to 5,000 kilometers, with specific intervals varying by model as designated by the manufacturer. Below are the detailed explanations: First Maintenance Timing: The first maintenance for a new car is recommended within 3-5 months or upon reaching 3,000 to 5,000 kilometers, whichever comes first, based on either the mileage or the stipulated maintenance period. First Maintenance Items: The service includes tightening components in the vehicle's front engine compartment and inspecting and securing all mechanical connection nuts throughout the car. It also involves checking tire tread and pressure, removing small stones and debris from the tires, replacing the engine oil and oil filter, conducting a software check on the vehicle's electronic systems, inspecting and adjusting all lights, and examining the suspension and braking systems.
13
1
Share

What is the wading depth of the Jimny?

The wading depth of the Jimny is 190mm. The wading depth of the Jimny is determined by the height of the vehicle's chassis, which is the ground clearance listed in the model's parameter configuration table. Generally, the greater the ground clearance, the higher the chassis, and the higher the safety factor when passing through waterlogged roads. Therefore, in terms of safe wading depth, the advantages of off-road vehicles and SUVs are obvious. However, for most compact cars and small cars with low chassis, the position of the vehicle's air intake should be used as a reference when passing through waterlogged roads. If the air intake of the Jimny is below the water level during wading, water will be sucked into the engine's cylinders. Since water cannot be compressed like air, it will cause severe damage to the engine's mechanical components (such as connecting rods, pistons, crankshafts, etc.). Therefore, the wading depth should not exceed the height of the engine's air intake. The height of the engine's air intake, and thus the maximum wading depth, can also be increased by installing a snorkel. If wading is unavoidable, the following safe and correct operations should be performed: Before the vehicle enters the water, the automatic start-stop function must be turned off to prevent the engine from automatically restarting after stalling in the water, which could cause severe damage due to water entering the engine. Assess the underwater road conditions based on the passage of vehicles ahead and choose the entry point carefully. Observe the path taken by other vehicles and follow their tracks at low speed, avoiding sudden acceleration or deceleration. On roads prone to water accumulation, observe warning water level markers, trees, and reference points such as the wheels and doors of other vehicles to estimate the water depth before deciding whether to proceed. Know your vehicle's safe wading depth. If the water depth exceeds half the height of the tires or the engine's air intake, do not enter the water recklessly. Instead, choose an alternative route.
18
5
Share

Where is the rear fender located on a car?

The rear fender is the exterior body panel that covers the wheel, located above the right rear wheel of the car. The fender is also known as the wing panel. Its function is to prevent sand, gravel, and mud kicked up by the wheels from splashing onto the underside of the vehicle during driving. Therefore, the materials used must be resistant to weather aging and have good formability and processability. Some cars have front fenders made of a certain elastic plastic material, which provides cushioning and enhances safety. The term "fender" originates from the shape and position of this component on older car bodies, resembling a bird's wing. It refers to a covering part on motor vehicles and non-motor vehicles. Based on installation location, fenders are categorized into front fenders and rear fenders. Design principle of fenders: Since the front wheels have steering functionality, the design must ensure maximum space for wheel movement. Designers use "wheel travel diagrams" based on selected tire models and sizes to verify the dimensions of the fender design. Rear fenders do not face wheel contact issues, but for aerodynamic considerations, they are slightly arched and protrude outward. Functions of fenders: Besides preventing mud and stones, fenders also reduce wind resistance generated during driving, contributing to the car's stability. Fenders also protect the chassis. During vehicle use, fenders are highly susceptible to damage, with cracking being the most common issue. Daily maintenance and replacement considerations: The side panels are not a single unit. Although exterior panels are less critical in collisions, they affect the overall aesthetics of the vehicle and cannot be simply repaired with filler paste. Gas shielded welding generates significant heat, which can burn off the factory-applied anti-corrosion coating. Areas not visible from the inside generally do not receive anti-corrosion treatment, and if done, it may not match the factory standard, potentially leading to rust. Replacing the rear fender may cause misalignment with the rear door lock, as manual welding and measurement cannot achieve the same precision as factory installation.
2
1
Share

Is It Normal for a Dual-Clutch Transmission to Make Metal Clashing Noises When Shifting?

It is normal for a dual-clutch transmission to produce metal clashing sounds under certain conditions. Definition of Dual-Clutch Transmission: A dual-clutch transmission is a relatively simple automatic transmission in structure. Its design is similar to that of a manual transmission, with the only difference being that it has an additional set of clutch and gear-shift control mechanism. Function of Dual-Clutch Transmission: One set of the dual-clutch transmission's clutches is responsible for controlling the odd-numbered gears, while the other set controls the even-numbered gears. The dual-clutch transmission offers fast shifting speeds and relatively high transmission efficiency.
17
3
Share

Is the domestic Ninja 150cc sufficient for daily use?

Domestic Ninja 150cc is sufficient for daily use. Performance characteristics: The performance characteristics of the Ninja engine, its lightweight handling, extremely light clutch pull, and relatively relaxed ergonomics together create an optimal environment for novice riders to easily get started without experiencing discomfort or pressure. The increase in horsepower also satisfies some experienced riders. Ninja fuel consumption: The motorcycle consumes 3 liters of fuel per 100 kilometers. The fuel consumption of a motorcycle is not only related to the motorcycle itself but also closely connected to the driver's driving habits and road conditions.
4
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.