What are the defects of the N46 engine?

1 Answers
VonPenelope
07/29/25 5:42pm
The N46 engine has issues with oil leaks from the valve cover gasket, cylinder head gasket, and burning oil due to aging valve stem seals. Below are the relevant details: 1. Sealing performance: This engine operates at a temperature of around 110°C. After driving 40,000 to 60,000 kilometers, the sealing performance of some rubber seals deteriorates. 2. Rubber hardening and brittleness: The valve cover gasket, which frequently operates under high temperature and pressure, causes the rubber to harden and become brittle over time, leading to reduced sealing performance and oil leaks from the valve cover gasket. 3. Deterioration of oil seal performance: The decline in sealing performance of the valve stem seals results in severe oil burning in the N46 engine, consuming approximately 1 liter of oil every 1,000 kilometers.
Was this review help?
1
2
Share
More Forum Discussions

How old should a child be to ride in a car seat?

It is recommended that children ride in a car seat after they are at least 1 year old, as sitting in a car seat for prolonged periods too early can negatively affect spinal development. A car seat is a seat installed in a vehicle for children, equipped with restraints to ensure the child's safety in the event of a collision. In cases of a car crash or sudden deceleration, it can reduce the impact force on the child and limit their body movement, thereby minimizing injuries. For vehicles without ISOFIX, the method to install a car seat is to add an ISOFIX interface to the car. You can choose accessories specifically designed to add ISOFIX interfaces to vehicles, and the installation is relatively simple. Once installed, you can then fit a child seat with an ISOFIX interface.
8
2
Share

What is the sequence for installing cylinder head bolts?

The sequence for installing cylinder head bolts is: 1. Loosen the cylinder head bolts in two to three steps, following a crisscross pattern from both sides toward the center, using a torque wrench and a specialized socket. 2. Quickly rock the specialized socket to remove the cylinder head bolts in the same sequence. 3. Remove the cylinder head and place it sideways in an appropriate position, then remove the cylinder gasket and place it in a suitable location. Engine maintenance methods include: 1. Using high-quality engine oil; 2. Using qualified coolant; 3. Regularly cleaning the radiator scale; 4. Periodically removing carbon deposits from the car; 5. Timely replacement of the car's three filters; 6. Maintaining a reasonable engine speed.
5
3
Share

How to Accurately Adjust Car Lights?

Car lights can be accurately adjusted by following these steps: 1. Choose a dim environment, park the car facing a wall, ensuring the front of the car is aligned with the wall and is about five to six meters away; 2. Turn on the headlights and cover one headlight with a thick, opaque cloth to adjust each headlight individually. To ensure the beam position is correct for normal driving, it's best not to leave the vehicle empty—have a friend sit in the driver's seat; 3. Use a marker or chalk to mark the center of the light beam's range on the wall, and also mark the point on the wall corresponding to the center of the car's emblem. Measure the distance from the marks of each headlight to the center mark—these distances should be equal; 4. Adjust the height of the beams. The right headlight should be adjusted to shine completely horizontally, while the left headlight should be raised about 10 cm, but not too high to avoid blinding oncoming drivers. The right headlight's range can be slightly angled to the right to improve visibility on the right side of the vehicle.
20
2
Share

What does 'start' mean in a car?

In a car, 'start' refers to the starting gear with a reset function (resetting to the 'on' position). When the key switch is turned to the start position, it controls the engagement of the starter relay, allowing the starter to rotate the engine crankshaft, thereby initiating the engine's operation. An automatic transmission, as opposed to a manual transmission, is a gear-shifting device that can automatically change gears based on the vehicle's speed and engine RPM. It mainly includes four types: hydraulic automatic transmission, continuously variable automatic transmission (CVT), electronically controlled mechanical automatic transmission, and dual-clutch automatic transmission. The core function of an automatic transmission is to achieve automatic gear shifting. Automatic gear shifting means that while the car is in motion, the driver operates the accelerator pedal as needed, and the automatic transmission can automatically shift into different gears based on the engine load and the vehicle's operating conditions.
16
5
Share

Can scratches on the windshield be repaired?

There are two scenarios for repairing scratches on the windshield. Some minor scratches can be repaired, but for large-area scratches, the repair process is quite complex and the results may not be very noticeable. For long and deep scratches within the driver's line of sight, repair is not recommended; instead, it's advisable to replace the entire windshield. Before repairing the scratches, the car glass must be thoroughly cleaned to ensure there are no impurities or debris. Use a cloth to wipe the glass dry, maintaining a dry environment. Small scratches can be removed by polishing. If you don't have specialized equipment, you can apply toothpaste to a small area, rub it back and forth with a towel, then rinse with water to check the effect. If effective, proceed to treat larger scratch areas.
10
2
Share

Why is it difficult to start the car after exposure to the sun?

Difficulty in starting a car after prolonged sun exposure can be caused by issues such as a faulty carbon canister purge valve, clogged fuel lines, or a damaged coolant temperature sensor. When experiencing such symptoms, it is advisable to seek repairs at a nearby auto repair shop or 4S store to avoid affecting the normal operation of the vehicle. During prolonged sun exposure, if the carbon canister purge valve remains open, fuel vapor can enter the intake manifold through the carbon canister, leading to an overly rich air-fuel mixture in the engine cylinders, which makes starting the car difficult. Additionally, if the external temperature is too high, the coolant temperature sensor may trigger a protective mechanism to prevent damage to the vehicle, causing the car to remain in a shutdown state. Once the external temperature returns to normal levels, the vehicle can be started normally.
11
0
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.