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FE6T Engine Parts Valve Guide 13211z5500
The FE6T engine is a common diesel engine used in various applications, and the valve guide is a crucial component in the engine's cylinder head. The valve guide is a cylindrical component that guides and supports the engine's intake and exhaust valves as they move within the cylinder head
Overview of the valve guide's role and function:
Function:
- Valve guides serve several essential functions in the engine's cylinder head:
- Valve Guidance: The valve guide precisely guides the movement of the intake and exhaust valves, ensuring they move smoothly and accurately.
- Valve Alignment: Valve guides help maintain the proper alignment of the valves with the valve seats, ensuring a secure and effective seal when closed.
- Heat Dissipation: Valve guides help dissipate heat from the valves, preventing overheating and damage.
- Wear Resistance: They are typically made from materials that offer excellent wear resistance, as the valves move up and down frequently, causing friction.
Materials:
- Valve guides are often made from materials like bronze, cast iron, or other alloys that can withstand the high temperatures and mechanical stresses associated with engine operation.
Maintenance:
- Regular maintenance and inspection of the valve guides are important to ensure they remain in good condition. Over time, valve guides can wear or develop excessive clearance, which can lead to issues like valve stem and guide wear, excessive oil consumption, and poor engine performance.
Product Parameter：
|
Product Name |
Valve Guides |
|
Application |
Engineering Machinery Engine |
|
OEM Number |
13211-Z5500 |
|
Engine Number |
FE6T |
|
Car Model |
NISSAN |
|
Size |
Customized |
|
Condition |
100% Brand-new |
|
Warranty |
6 Months |
|
Packing |
Neutral / OEM |
|
Application Industries |
Manufacturing Plant, Machinery Repair Shops, Retail, Construction Works |
The valve guide is precision-manufactured to ensure accurate sizing and a smooth surface finish. Its excellent sealing performance effectively prevents gas and liquid leakage, ensuring the engine operates normally. Compared to other valve guides crafted from poor quality, it has a longer service life and can be used for extended periods without replacement.
Meet Different Requirement and Model types:
The valve guide is designed to be versatile and adaptable to a wide range of operating conditions and environments. It is engineered to meet the needs of different vehicle models and usage requirements. This makes it an ideal choice for a variety of applications, including heavy-duty trucks, buses, and other commercial vehicles. The valve guide’s high-quality materials and precision manufacturing ensure that it can withstand the demands of harsh operating conditions, such as extreme temperatures, high pressures, and heavy loads. Its excellent sealing performance prevents gas and liquid leakage, ensuring the engine operates normally. With its versatility and adaptability, the valve guide is a reliable and durable component that can meet the needs of a wide range of applications.
High Accuracy and High-quality Material:
The valve guide is mainly made of high-strength alloy material, which provides excellent wear and corrosion resistance, making it capable of withstanding high-temperature and high-pressure working environments. The valve guide is also characterized by its high precision machining, which ensures the accuracy and stability of the valve’s movement, thereby improving the engine’s performance and reliability. With its high strength, durability, and precision, the valve guide is a critical component that plays a vital role in ensuring the engine’s optimal performance and longevity.
Application:
- Commercial Vehicles: such as heavy-duty trucks, buses, and construction vehicles;
- Industrial Machinery: such as excavators, loaders, and bulldozers;
- Ships: such as cargo ships, passenger ships, and fishing boats;
- Power Generation Equipment: such as diesel generators and gas generators.
Maintenance of FE6T Engine Valve Guide?
- Regularly Change: It is easy to wear and ageing in long-term usage, causing the valve without smooth movement;
- Regularly Clean: In using, it will accumulate oil and dirt, which will influence the engine’s normal operation;
- Regularly Check the High Sealing: Once the valve guides make leakage, which will make the valve in abnormal operation to influence engine’s performance.
What is a valve guide?
The function of the valve guide is to guide the movement of the valve, to ensure that the valve does reciprocal linear motion, so that the valve and valve seat ring can be correctly fitted, and the valve stem heat transfer to the cylinder head.
The valve guide tube working temperature is also higher, about 200 ℃. Valve rod in the conduit movement, only by the air distribution mechanism splash out of the oil lubrication, so easy to wear. So more with the self-slip performance of ductile iron or powder metallurgy material made of separate parts, with a certain interference pressed into the cylinder head valve guide seat hole, to prevent falling off.
In some engines to prevent the valve guide from losing, the use a card ring to fix and position the guide.
The bottom of the valve guide into the intake and exhaust tract, to prevent resistance to airflow, into the end of the outer circle made of conical. There is a clearance of 0.05~0.12mm between the valve guide and valve stem so that the valve stem can move freely in the guide.
The structure of the valve guide
Valve guide tube to do reciprocating motion in the valve to support the role of guidance, to ensure that the valve and valve seat can be correctly fit, and play a role in heat conduction.
Valve guide has a whole type and is set into two. Integral valve guide in the cylinder head directly machined valve stem hole. Inserted valve guide in the cylinder head of the tube hole pressed into a cylindrical tube, the amount of interference for 0.015 ~ 0.065mm.
Some valves guide the outer cylindrical surface processing ring groove, set into the ring for positioning, limiting the depth of the lower end of the airway, and preventing loss.
The valve rod and valve guide between the general leave 0.05 ~ 0.12mm with the clearance. They are lubricated by the oil splashed out from the valve transmission parts.
If the valve stem and valve guide clearance are too small, it is easy to lead to valve stem card bite, poor sealing, will cause valve burn, so that the power, economy, and emissions decline.
If the valve stem and valve guide clearance are too large, it will cause the following abnormal phenomena.
1. Valve seat is not smooth, the seal decreases, and accelerates wear, resulting in valve burnout, power, economy, emissions decline, etc.
2. Air leakage in the air intake system, making the gasoline engine mixture thinner.
3. Excessive oil seeps down through the gap into the combustion chamber or air duct (especially in the intake process), resulting in increased oil consumption, blue smoke, and accelerated formation of carbon.
4. Exhaust gas enters the crankcase through the gap between the exhaust valve stem and valve guide in the exhaust stroke.
5. When the pressure at the exhaust port is lower than the pressure in the crankcase, the oil leaks into the exhaust port through the gap between the exhaust valve stem and the valve guide.
The reason for blue smoke at startup is often the exhaust valve duct gap is too large, when the shutdown time oil leaks down through the exhaust valve duct gap into the combustion chamber and adheres to the exhaust manifold, and is burned off at startup. This phenomenon will reduce or disappear as the engine temperature rises.
The role of the valve oil seal is to prevent excessive oil leakage through the valve guide and valve stem gap into the combustion chamber or intake and exhaust tract. It is a rubber seal, installed on the upper end of the valve guide. If the valve oil seal is damaged, there will be too much oil through the gap between the valve and valve guiding the downward flow of the combustion chamber or air duct, resulting in increased oil consumption, accompanied by exhaust blue smoke, accelerating the formation of carbon in the valve and combustion chamber.
