Pentium x40, what's with the loud engine?

Bian Xiao is about "What happened to pentium x40's loud engine?" Provide you with the following related contents:

Pentium x40 engine is noisy, which may be caused by the following reasons:

1. hydraulic tappet: due to low oil pressure or wear of the hydraulic tappet itself, the hydraulic tappet enters the air and produces abnormal sound;

2. Valve clearance: the valve rocker arm is seriously worn, resulting in excessive valve clearance;

3. Dirty throttle: a dirty throttle caused by the continuous accumulation of sludge and carbon deposits;

4. Working sound of carbon canister solenoid valve: This is a normal sound and can be used continuously. If the noise is too loud, it is recommended to go to the 4S shop for inspection. Million car purchase subsidy