What is the abnormal noise of Toyota VIOS 1000 extremely fast refueling?

Cause of abnormal sound of Toyota VIOS 1000 in Pacific Auto Network: 1, tappet jumps when the cam is excessively worn; 2. The rocker head of the overhead valve collides with the top of the valve; 3. Too much carbon deposit on the valve guide; 4. valve spring retainer falls off; 5. Hydraulic tappets and tappets are damaged; 6, machine foot glue aging or loose.

Abnormal noise may be the cause of engine oil during refueling acceleration. Inferior engine oil, long-term failure to change engine oil, insufficient engine oil, etc. , it will easily lead to the increase of friction between the valve and the guide tube and the hydraulic tappet, thus making all kinds of sounds in the engine louder.

When the oil temperature of general automobile does not reach the normal value, the viscosity is not suitable for the normal working value of hydraulic tappet, and the sealing performance of hydraulic tappet is reduced, so it will make a sound. Throttle, a device for controlling fuel supply on internal combustion engine, is generally controlled by pedal, also called accelerator pedal, which is a device for controlling fuel supply of automobile engine.

When starting the engine, don't step on the accelerator pedal to the end, just slightly higher than the idle accelerator. When starting, it is best to refuel just before the clutch linkage point, and the throttle opening should be medium or small. Loosening the clutch should be closely coordinated with stepping on the accelerator, and the action should be agile. When operating, increase or decrease the throttle according to the road conditions and actual needs. The selected gear should be suitable, so that the engine can run at medium speed and large throttle most of the time to save fuel. When shifting gears, the coordination of refueling, stepping on the clutch and stepping on the accelerator should be coordinated.

(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)