Tips for testing the sealing performance of car valves
Jul 29,2025
As is well known, smoking is harmful to health, but there are still few people who know that cigarettes have some wonderful uses in car maintenance. Cigarettes can not only be used for diagnosing faults, but also for emergency situations when conditions are limited or tasks are particularly urgent. Let's take a look at how to use cigarettes to check the sealing of car valves:
The sealing between the valve and valve seat can be checked using the smoke blowing method. Clean the ground valve and place it in the valve guide in order. Use your hand or a suitable tool (such as a screwdriver) to hold the valve, then take a puff of smoke and blow it towards the cleaned intake and exhaust manifolds, ensuring that the valve fits snugly and does not leak. Simultaneously observe whether there is smoke coming out between the valve and the valve seat. If there is no smoke coming out, it indicates that the valve has good sealing. Otherwise, it should be re ground.
In addition, to check whether the oil and air passages of the car valve are unobstructed, the blowing method can be used to check whether the oil passages of the carburetor are unobstructed. Smoke ash can be used as a grinding agent. Cigarette ash is a good grinding agent. When repairing car carburetors, especially imported car carburetors, it is often encountered that the triangular needle valve is worn and difficult to buy. At this time, cigarette ash can be mixed with engine oil as a grinding agent to grind the triangular needle valve and triangular needle valve seat, which will achieve satisfactory results. Tobacco can be used to plug leaks, and filter tips can be used as lubricating felt.
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