Engine oil pressure test

Oil pressure or, more precisely, its absence – in some places of the engine can lead to serious engine problems. Engine oil pressure decreases over time (increased operational life) for all engines, as a result of natural corrosion and increased clearances. However, the abnormal decrease in oil pressure in the case of new engines is mostly the result of an engine problem and needs urgent repair. Leaving engine oiling system problems untreated may exacerbate the problem, and may lead to the hardening of the engine (guff), at which point we will need a complete change of engine instead of repairing it.

Oil pressure source:

The oil pump does not work and increases oil pressure but the pump only pumps a continuous amount of oil, but it is the resistance to the flow of oil through the oil path that leads to the formation and lifting of the pressure value.

Factors affecting oil pressure (amount of oil delivered, resistance to oil flow in the tracks (suitable oil viscosity, standard clearances)) are as follows:

– Pump status (standard clearances)
– The loading chairs are cleared, the attachment column, the muzzle, the loading chairs, the delivery arms (corrosion or damage to the chairs)
– For oil viscosity (oil type and condition)
– Temperature (engine, atmosphere)
– Pulse pressure protection valve (pressure regulating valve) valve for the oil pump (this valve works when the pressure exceeds the specified amount of pressure (40 to 60 lbs/s/h). This allows the oil to return to the oil container, reducing the pressure of oil in the engine, in order to prevent oil pressure from reaching a high level that may lead to the explosion of the oil filter or push the oil trails in the engine mass out.

Oil pressure problems:

Symptoms of low pressure of engine oil:

– Intermittent light of the bulb pressure indicator light (light in case of low oil pressure),
– Hearing noise from the engine (as a result of lack of good oiling, corrosion increases in attachment column loading chairs (alloys), clearance increases, sound is sounded),
– Difficulty starting management (poor oiling and damage to attachment column loading chairs and delivery arms leads to increased friction and difficulty starting management),
– Poor engine performance (increased friction within the engine increases friction resistance and loss of engine capacity)
– The oil pressure warning light bulb is delayed after starting operation; before the engine starts to turn on (when the switch is turned on and before the start of the movement) the oil bulb is lit and takes about one to two seconds to turn off. If the time increases by more than two seconds, this indicates that the oil filter is blocked and needs to be changed, either there is an increase in loading chairs or an increase in oil pump clearances.

Symptoms of high pressure of engine oil:

Possible causes of low oil pressure:

– Engine with a large operating life
– There are more clearances than standard clearances in the main loading chairs and loading chairs as a result of corrosion.
– Erosion in the cam shaft or attachment column
– Damage to the oil pressure sensor unit (low reading of the meter, or lighting of the pressure warning bulb)
– Damage to the electrical circuit of the oil pressure sensor (attached to the ground or open)
– Low level (level) of engine oil, or also increased (low oil level in the oil bowl allows air to enter the pump. Increasing the level of oil also leads to the contact of excess oil with the attachment column when it rotates and the oil turns into foam, and the air bubbles enter the pump with oil)
– Use of low viscosity oil or reduction of oil viscosity as a result of gasoline oil contamination
– Blockage in the oil withdrawal refinery of the oil pump oil strainer (reduce the amount of oil sent)
– Blockage of the oil filter (blockage of the oil filter will open the oil pressure drainage valve, which reduces the pressure value to the specific pressure of the oil pressure drain valve)
– Problem with oil drainage valve (weakness or break valve spring, or valve adhesion in opening mode)
– The presence of a crack or the lack of tightening of the oil withdrawal tube connecting the refinery to the pickup tube pump (air entry with oil)
– The problem of increasing clearance in the oil pump (damage or corrosion in the oil pump)

Possible causes of high oil pressure:

Reasons for testing engine oil pressure:

It is preferable to do an oil pressure test when there is reason to believe that oil pressure is incorrect or when needed to check the condition of the engine, phenomena that require oil pressure testing:

– Poor engine performance

– Cut the light of the oil pressure warning bulb with a tabloid

– Excessive noise from the engine

– The difficulty of starting management

Pre-test engine oil pressure procedures:

Oil pressure problems may have nothing to do with the engine condition, so other causes can first be detected:

– Check the level of engine oil

– Check the work of a pressure value sensor unit

Check engine oil level:

Diagnosis of low oil pressure can begin with a dipstick oil level measurement stick. Check the oil level to make sure the oil level is correct inside the oil bowl (not less or more). In case of low oil level, this may be due to leakage or combustion of oil inside the engine. Adding oil may solve the problem of low pressure, but if the oil level is not maintained, the problem may recur. The oil pressure measuring stick also notes the state of the oil and the degree of its appropriate wife.

When measuring the oil level, wait at least 15 minutes after turning off the engine to allow the oil to filter and return to the oil bowl. This ensures a healthy reading of the engine oil level. Measuring the oil level immediately after the engine stops will give improper (low) readers to the oil level as most of the oil is still inside the oil circuit.

Detection of the pressure value sensor unit:

Unplug the unit and notice the pressure warning bulb or the tabloid pressure counter. If the warning light bulb remains lit if the pressure sensor unit is separated, it means that there is a ground connection in the oil bulb warning circuit. If the pressure value remains constant at the counter, it means that the problem is at the counter and not in the engine.

The oil pressure warning bulb is connected to a pressure valve, the pressure valve sends a signal when the pressure reaches less than 5 lbs per square inch (3.5 kPs), that value varies from engine to engine according to its specifications.

Engine oil pressure test:

Device used:

A pressure meter (mechanical counter) and a tube (lee) are used to withstand high pressure, bringing the device into the engine. The meter range should be 0 to 100 lbs per square inch (690 kPs).

Connect the device to the engine:

The tube connects to the cylinder mass in the area from which engine oil pressure is measured, such as a sensor opening (pressure signal transmission unit), the main oil line, or the base of the oil filter. The area most suitable for measuring different engines is provided in their maintenance catalog.

Precautions to take when testing:

– Oil pressure test is performed after changing engine oil and oil filter (so that the state of oil and filter does not affect the test results).

– The engine must be turned on to reach the operating temperature. The operating temperature is also provided for in the catalog. When we reach the operating temperature, the engine must be turned on at the prescribed speed for the test.

Test steps:

– You should check the quality of the delivery, so that there is no oil leak that limits the pressure

– Oil pressure data should be reviewed from the car's maintenance manual under test.

– The test is conducted at the speed of the empty load (about 2,000 laps/minutes or as stipulated in the maintenance catalog)

– Take the meter reading.

– Reading compares to the standard values set out in the catalog.

Analysis of test results:

The pressure meter reading depends on operational age, engine type, and is in the range of 20 to 30

Lbs per square inch (138-207 kPs) at empty load speed, 40 to 60

Pound per square inch (276-413 kPs) at normal speed of traffic. must

Refer to the engine's standard pressure specifications under test to compare test results.