Symptoms of car valve leaks include vehicle weakness, increased fuel consumption, and difficulty in starting the engine. So, what is the cause of valve leakage? The following will introduce you to the main causes of valve leakage and solutions:

The main causes of valve leakage include:

There is carbon deposit or burning between valve and valve seat;

The matching clearance between the valve and the valve guide is incorrect, the clearance is too large, the valve shakes, and the valve will deflect when closed, resulting in poor sealing;

If the clearance is too small, the valve is stuck in the guide, making the valve not closed tightly or unable to close;

The valve clearance is too small, and the valve stem and other parts have no room for expansion after being heated and are not closed tightly.

So, how to solve the problem of valve leakage? The following are several common solutions:

Clean up the carbon deposit;

Replace the valve spring;

Adjust the valve clearance as required.