The silver needle, also known as the white needle, one of the treasures of White Tea. because of its white, such as silver, the shape of the needle and so named. Silver Needle Tea's aroma is fresh, soup color light yellow, taste fresh and cool, is the best in white tea, known as " beauty " , " king of tea " in tea. Its fresh leaf raw material is all tea bud, pick standard is one bud one leaf, grow about 3 centimeters. The silver needle is suitable for the general population to drink, the taste is warm and cold, has the effect of antipyretic heat treatment and detoxification, and is often used as medicine.
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(2) There is a regular intermittent white smoke or smoke black in the exhaust pipe.
(3) Severe knocking sound when increasing the throttle or increasing the load.
2. Judgment of fault location (1) When the throttle is small, check the cylinder to release the high-pressure tubing (the release time should not be too long). When the high-pressure tubing of a certain cylinder is released, the smoke disappears, and the airflow sound and valve knock can be heard. A click sound indicates that the valve seat is loose.
(2) When a valve seat is loose, the corresponding valve stem often rises to the highest point, causing the valve clearance to be large and small, and there is a phenomenon of card issuing when the valve moves.
(3) The cylinder with loose valve seat has little or no compressive force; in the compression process, the intake or exhaust pipe has obvious air leakage.
(4) When the intake valve seat is loose, during the compression process, the gas will be flushed into the air filter and there will be a “click†sound in the intake manifold; after the engine is started, the cylinder intake manifold is more than other cylinders. High temperature.
(5) When the exhaust valve seat is loose, there is a "click" sound at the exhaust manifold; after the engine is started, the exhaust manifold of the cylinder is lower than other temperatures.
How to Find Loose Valve Seat
1. Abnormal phenomenon of the engine when the valve seat is loose (1) The engine abnormally sounds abruptly. There is a striking sound on the cylinder. There is a phenomenon of “broken cylinder†and the power is reduced. In severe cases, the engine cannot work.