Engine repair Riga-Latvia

What is an engine and what does the engine repair time depend on?

The engine of a car is the most important part of any car, converting the energy of combustion of combustible substances into mechanical energy that sets the car in motion. Like any other mechanism, the engine can fail.

Engine repair time depends on many factors, but mainly on the mileage of your vehicle. For most cars, this time depends on the reliability of the engine design and its operating conditions. The average mileage of cars is 150 thousand kilometers, and for most cars, it can be 250 thousand kilometers or more. Professional engine repair is very expensive and difficult!

Naturally, the operating conditions of the engine also significantly affect the operation of the engine. In places where the climate is hot, the time can be reduced by almost half, and with quiet driving on good roads, this time increases significantly compared to urban exploitation. In addition, build quality and timely engine maintenance greatly affect engine life. The use of unsuitable oils and poor quality filters ‘kills’ your car. In no case should you save on car oil, in the end this can lead to engine damage even on a new car.

Signs of engine problems

The following factors influence the condition of the engine:

  • use of low-quality fuels and lubricants;
  • operation in difficult conditions;
  • aggressive driving style;
  • the engine temperature is out of permissible limits;
  • non-observance of service intervals.

The engine does not malfunction immediately. It starts up, works, but over time it announces louder and louder that soon it will require diagnostics and replacement of worn-out parts, and maybe a major overhaul of the engine or its complete replacement. The sooner the driver pays attention to the signs of malfunctions, the easier and cheaper it will be to make repairs. Untimely intervention leads to the appearance of new breakdowns, the engine becomes faulty.

Loss of acceleration dynamics

Over time, the engine loses power, respectively, the car accelerates worse, consumes more fuel. If the decrease in dynamics is the result of natural wear and tear of the engine, then this is normal. It is necessary to intervene when the power loss reaches 20% or more. It’s hard not to feel it.

In addition to engine wear, a lot of other malfunctions affect the acceleration dynamics:

  • failure, incorrect operation of the power supply and ignition systems;
  • use of substandard fuel;
  • transmission malfunctions, such as when the clutch slips.
  • high back pressure of exhaust gases in the exhaust tract caused by a clogged catalyst.

Excessive oil consumption

The consumption of lubricants in an internal combustion engine can vary significantly from vehicle to vehicle. In some models, the consumption of 1 liter of oil per 1000 km is considered the norm. Others, when in good condition, do not require topping up from replacement to replacement. There are several reasons for the increased oil consumption:

  • wear of the cylinder-piston group;
  • failure of valve stem seals;
  • coking of the crankcase ventilation channel, as well as other reasons.

When oil enters the combustion chamber, the exhaust becomes bluish, bluish in color. In all cases, it is necessary to quickly establish and eliminate the cause of excessive consumption of lubricants.

Low oil pressure

All vehicles have a control indicator on the instrument panel that signals that the lubricant pressure is below normal. When the alarm goes off, stop the engine immediately and eliminate the cause.

Insufficient pressure can be caused by both an elementary lack of oil, a clogged filter, and serious breakdowns, including failure of the oil pump, clogged oil channels, oil dilution with antifreeze through a punctured head gasket. These are the most common causes of oil pressure drop.

Intermittent idling

A serviceable engine in all modes runs smoothly and smoothly, which cannot be said about a worn out engine. Rough idling can be caused by various reasons, such as:

  • misfiring caused by worn out spark plugs, faulty ignition coils;
  • dirty or defective injectors;
  • low fuel pressure;
  • air leaks.

Such malfunctions have a serious impact on the performance of the engine, but are not critical. The unstable operation of the engine caused by the scatter of compression in the cylinders due to uneven wear of the cylinder-piston group and leaking valves should become a cause for serious concern.

Carbon deposits on candles

For an experienced driver, candles are a kind of indicator of the state of the engine. The dull white color of the electrodes indicates the ingress of antifreeze into the combustion chamber. Dark grainy deposits are caused by oil on the plugs. Black carbon deposits are formed when the air-fuel mixture is re-enriched. The ingress of antifreeze or oil into the combustion chamber is a serious nuisance, in some cases requiring a major overhaul of the engine.

Overheating of the engine

It is very important to carefully monitor the temperature of the coolant, information about which is displayed on the instrument panel. Overheating of the engine in most cases leads to serious consequences, the elimination of which will require major repairs. By itself, this phenomenon can be caused by a faulty cooling system, severe operating conditions, extreme heat. But when all the units are working properly, and the engine overheats for no apparent reason, the piston group is probably badly worn out. Such overheating is accompanied by detonation knocks, the car refuses to drive normally, and loses power greatly.

The appearance of signs of incorrect engine operation is a reason for immediate intervention. Modern engines have a complex design, and the exact answer about the condition of the engine will be given by comprehensive engine diagnostics, including checking the electronic control system, electrical equipment, and attachments.

The main types of engine malfunctions

There are malfunctions of the power unit, upon detection of which, starting the engine, and the operation of the car is strictly prohibited. Some of them are detected directly when starting the engine or while driving. Such malfunctions are reported to the driver by special malfunction indicators located on the dashboard of the vehicle.

These include:

  1. Control lamp for emergency oil pressure (Oil pressure lov).
  2. Check engine indicator.
  3. Modern cars are also equipped with a Check oil / Oil level low indicator lamp.
  4. In the event of warning signals from alarm indicators, it is necessary to immediately check all vehicle systems, the performance of which they control.

An engine error reported by the ECU can be caused by faults:

  • oxygen sensor (lambda probe);
  • exhaust gas catalyst;
  • fuel mass flow sensor;
  • high voltage wires;
  • spark plugs.

Why won’t the car engine start?

Surprisingly, the inability to start the engine is not included in the list of major powertrain malfunctions.

As a rule, the car engine will not start for the following reasons:

  1. The battery is discharged or its terminals are oxidized.
  2. Fuel does not flow (fuel line is clogged, fuel pump does not work, etc.).
  3. Starter defective.
  4. Broken wires.
  5. Malfunctioning ECU, etc.

What does car engine repair include?

  • Removing the engine, disassembling it and cleaning all units separately
  • Search for defects in engine parts
  1. determination of the presence of cracks on the engine block;
  2. measuring the corresponding clearances;
  3. crankshaft troubleshooting;
  4. measuring the geometry of all rubbing parts, comparing the dimensions with the factory ones and determining deviations from the norm.
  • Identification of damage on all parts, determination of the degree of wear
  • Cylinder block repair

Cylinder head repair:

  1. elimination of cracks;
  2. replacement or restoration of guide bushings;
  3. replacement or, if possible, restoration of valve seat chamfers;
  4. selection and installation of new valve stem seals;
  5. replacement or restoration of the camshaft, valves, pushers

Cylinder block repair:

  1. boring, grinding of cylinders and installation of new liners;
  2. elimination of cracks in the block;
  3. repair of the crankshaft niche;
  4. alignment of the mating plane.
  • Crankshaft repair
  • Cylinder head repair
  • Assembly and installation of the engine
  • Running in the engine cold – long-term operation of the internal combustion engine at idle speed. This procedure allows all elements to rub in for stable future engine operation.

The final stage of the overhaul is the adjustment of the following indicators:

  • idle speed;
  • the level of toxicity of exhaust gases (CO);
  • ignition.