A car engine is a complex mechanism. He requires a careful attitude to his "well-being". Timely detection of engine "diseases" will help to avoid significant economic losses. Meanwhile, preliminary home engine diagnostics is a fairly simple process. Many emerging malfunctions can be easily established "by ear". A slightly altered "doctor's tube" - a phonendoscope - will help determine the defects of the metal "patient". The alteration consists in fixing a flexible membrane with a rod in the middle to the mirror.
It is necessary
Equip yourself with an updated phonendoscope and proceed to the "survey". Before him, you need to warm up the engine
Instructions
Step 1
Start listening from the bottom of the cylinder block. If a dull knock is heard in this area when the engine speed changes, the main bearings on the crankshaft journals need to be replaced. A knock with a long period, but heard a little higher, signals an excessive depletion of liners on the crankshaft connecting rod journals. Climbing even higher, we are trying to determine the wear of the piston pins.
Step 2
Now we "move" horizontally. If it knocks at the front end of the motor, the fasteners of the drives of various engine systems may be loosened or the drive of the timing mechanism may be worn out.
Step 3
Put the phonendoscope aside and take a little ride. Minor knocks that intensify when cornering indicate a weakening of the fasteners of the engine itself. If the knock increases during acceleration, then a possible "collapse" of the gas distribution system is approaching. If the pressure also drops, the main bearings may wear. Impacts and clanking at the moment of gear shifting indicate that the flywheel is beginning to unscrew.
