What Does Cylinder Topping Mean?

1 Answers
DiEdward
07/29/25 9:53pm
Cylinder topping refers to the situation where the connecting rod becomes excessively long due to excessive clearance in the connecting rod, causing it to hit the engine cylinder when the engine is running. Causes of engine cylinder topping: Broken spring: The intake or exhaust valve spring breaks, causing the valve to fall into the cylinder; it may also be due to hard objects falling into the combustion chamber. Excessive gasket thickness: During an overhaul, the connecting rod bearing replacement is too thick, or the gasket is too thick; or the piston geometric dimensions do not meet the requirements. Cylinder gasket failure: Frequent cylinder gasket failures can damage the cylinder block surface, and excessive repair can cause the piston to exceed the cylinder block surface when it reaches the top dead center, leading to cylinder topping. Poor fuel quality: The cause of engine cylinder topping may be the use of low-quality fuel by the owner, which causes the fuel to solidify near the valve stem after the engine is turned off, resulting in the valve sticking when the engine is cold and causing cylinder topping upon startup.
Was this review help?
11
4
Share
More Forum Discussions

How is the reputation of the Trumpchi M6?

The Trumpchi M6 has a good reputation and offers high cost performance. Here is some extended information about the Trumpchi M6: 1. Advantages: The space is very large, and the comfort is excellent. The interior space is spacious, providing ample room for movement. The seats are also very comfortable, and the price is quite affordable, making it very convenient for family trips. 2. Comfort: The comfort is excellent, with seats that feel like a mobile sofa, allowing for long rides without fatigue. It doesn’t feel as cramped as a sedan, and the sound insulation is good, with minimal noise inside the cabin. 3. Features: The rear radar and 360-degree panoramic camera are very convenient. The openable panoramic sunroof significantly enhances the sense of space inside the car. However, the functionality of the central control screen is lacking and feels not very useful.
14
4
Share

How often should the CVT transmission fluid be changed in a Honda Fit?

The transmission fluid in a Honda Fit should be changed every 2 years or 40,000 kilometers. The Fit uses a CVT transmission. For manual transmission models, the transmission fluid should be changed every 80,000 kilometers. The Fit is a compact car from Honda. The latest model has dimensions of 4109 mm in length, 1694 mm in width, and 1537 mm in height, with a wheelbase of 2530 mm. All Fit models are equipped with a 1.5-liter naturally aspirated Earth Dreams engine, which delivers 131 horsepower and a maximum torque of 155 Nm. This engine reaches its maximum power at 6600 rpm and its peak torque at 4600 rpm. This engine features i-VTEC technology and direct fuel injection, and it uses an aluminum alloy cylinder head and block. It is paired with either a 5-speed manual transmission or a CVT transmission. The CVT transmission is a relatively simple automatic transmission, consisting of only two pulleys and a steel belt. The steel belt can move along the pulleys.
6
1
Share

Has the chip shortage for Audi A4L been resolved?

An insider from FAW-Volkswagen Audi told Caijing News Agency that the news about multiple Audi main models suspending production due to chip shortage was false information and untrue. Therefore, Audi does not have a chip shortage issue, so there is no so-called recovery. Below are relevant details: 1. News: Recently, a news report titled "Multiple Audi main models suspend production due to chip shortage" has attracted attention. According to a "Audi Brand CKD Models Suspension Plan Notice" from FAW-Volkswagen to dealers exposed by media, due to continuous shortage of main control chips, Audi A4L, Audi A6L and Audi Q5L models will temporarily suspend production, with production expected to resume in the first quarter of next year. It is reported that the main reasons for Audi's production suspension are the lack of three modules: engine ECU control module, system interaction module, and GPS positioning module. 2. Clarification: According to Caijing News Agency, regarding the online rumor that "multiple Audi best-selling models suspend production due to 'chip shortage', many 4S stores have no inventory and switched to order-based sales", an insider from FAW-Volkswagen Audi told Caijing News Agency that this was false information and untrue.
11
1
Share

Can You Drive with a Blown Head Gasket?

You should not continue driving with a blown engine head gasket and must replace it immediately. The reasons for a blown head gasket are as follows: 1. Overheating: Main symptoms include weak acceleration, misfiring sounds during acceleration, small amounts of water discharged from the exhaust pipe, white smoke, and if there is an oily liquid in the radiator, it indicates a coolant passage leak. If there is water in the engine oil, it indicates an oil passage leak. 2. Gas leakage: High-pressure and high-temperature gases can escape through the head gasket, leading to reduced engine power, stalling or inability to reach high speeds, oil leaks, lubricant leakage from the head gasket area, excessive oil consumption in the oil pan, and potential engine crankshaft damage. 3. Coolant leakage: Coolant may leak from the head gasket, causing significant water loss, leading to engine dry burning, cylinder deformation, coolant entering the oil pan, excessive water consumption, oil emulsification, and resulting in crankshaft damage and cylinder deformation due to dry burning. 4. Oil pan issues: Gas entering the oil pan can cause the breather to leak gas, leading to poor lubrication in engine components like the camshaft and rocker arms, reduced engine power, gas entering the cooling system causing radiator gas leakage, poor cooling, and cylinder deformation.
1
1
Share

Does the Audi A4L have a hybrid version?

Audi A4L does have a hybrid version, which utilizes a 12V mild hybrid technology. Compared to conventional 12V electrical systems, the 12V mild hybrid system equipped with a 12V lithium-ion battery and belt-driven starter offers superior brake regeneration performance. The stored energy can reduce the engine combustion load point via the belt-driven starter. Additionally, during driving, the coasting mode can shut off the engine, thereby reducing fuel consumption and CO2 emissions. The application of this mild hybrid system can decrease fuel consumption by 0.3 liters per 100 kilometers. The characteristics of hybrid electric vehicles are as follows: Excellent fuel efficiency: The most notable feature of hybrid vehicles is "fuel efficiency." During startup and acceleration, electric motor assistance helps reduce fuel consumption. The internal combustion engine can be shut off, allowing the battery to drive alone, achieving "zero" emissions. The electric motor effectively compensates for the insufficient low-speed torque of the internal combustion engine, resulting in faster acceleration. Strong range capability: Compared to pure electric vehicles, hybrid electric vehicles have a significantly longer range. Currently, charging infrastructure like charging stations in China is not yet fully developed. Hybrid vehicles can refuel at gas stations just like traditional gasoline vehicles, making them more convenient and easier to use without changing driving habits. Higher costs: Although maintenance costs are similar to gasoline models, repair costs are higher, especially for the battery. If the battery is damaged after the warranty period expires, the replacement cost can be very expensive.
15
0
Share

What Does the Sun-Shaped Warning Light on the Dashboard Mean?

If a sun-shaped exclamation mark warning light appears on the dashboard of an automatic transmission vehicle, it may indicate a transmission fault. This light typically illuminates when the vehicle is started. If the light remains on, it suggests a potential issue with transmission components, requiring prompt attention to prevent further damage. Delayed Upshifting in Automatic Transmission: During driving, if the vehicle upshifts at speeds higher than the standard range or requires pressing the accelerator pedal to force an upshift, the issue may stem from improper throttle cable or throttle position sensor settings. Owners should inspect the throttle position sensor for damage and check the main oil pressure or throttle valve adjustment pressure, among other sensors. Automatic Transmission Fails to Upshift: If the transmission cannot upshift to 2nd gear or higher gears while driving, or if it can shift to 2nd gear but not to 3rd or overdrive, the shift valve may be stuck due to a faulty gear selector switch. Vehicle Unable to Move: If the vehicle fails to move in any gear or moves only a short distance before stopping after warming up, the issue could be due to a damaged automatic transmission oil pan. Inspect the linkage between the gear selector lever and the manual valve rocker arm, as well as the cables, for looseness or detachment to prevent further issues. Automatic Transmission Slipping: After starting the vehicle, pressing the accelerator pedal increases engine RPM, but the vehicle responds slowly. During driving, transmission gears and engine RPM rise quickly, but speed increases sluggishly. While performance may seem normal on flat roads, uphill driving reveals insufficient power and high engine RPM. This could result from abnormal automatic transmission fluid levels, causing the one-way overrunning clutch to slip. A damaged clutch piston seal ring may also lead to oil leaks.
17
1
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.