Car engine quality identification can be analyzed from the following aspects:
1. Audio-visual syndrome
It is very common for engines to have abnormal sounds. Audio-visual syndrome is to judge the location of the fault point by listening to the running sound of the engine. For example, roaring sounds often mean that the exhaust pipe is clogged or there is a valve problem in the cylinder, engine hissing is often a fan belt problem, and engine clicking noise is likely to be a valve failure, etc.
2, smell syndrome
Engine failure is often accompanied by peculiar smell, such as burning smell, engine oil smell, etc. By smelling the odor in the car, you can initially determine the location of the fault point. For example, burning smell is often related to spark plugs or electrical circuits, while oil smell may be caused by oil leakage or burned oil.
3, look for foam to diagnose symptoms
Water-cooled engines often have cooling system failures due to water pump failure, water tank rupture, water pipe leaks, etc. At this time, you need to check whether there is foam in the radiating water to determine whether there is a cooling system failure.
4, pressure measurement and diagnosis
Abnormal engine pressure often means there is a problem with the engine. By installing an engine pressure gauge to measure pressure, you can determine whether there are faults such as engine block damage and abnormal cylinder pressure.
05. Use instruments to diagnose symptoms 1 Modern cars are equipped with various electronic instruments, such as engine control modules (ECM), sensors, etc., which can be used to read fault codes and diagnose specific problems through fault codes. 2
