Oil pressure check

Oil pressure check

Step	Operation	Values	Yes	No
1	Is the oil pressure warning light on?	-	Go to operation 2	System OK
2	Check the oil level in the crankcase. Is the oil level low?	-	Go to operation 3	Go to operation 4
3	Add oil up to the level mark on the indicator. Has the renovation been completed?	-	Jump to operation 1	-
4	Check idle speed. Is the idle speed below the set value?	840±20 rpm	Go to operation 5	Go to operation 6
5	Increase idle speed. Has the idle speed increased?	-	Jump to operation 1	-
6	Check the oil pressure sensor. Is the oil pressure sensor inaccurate or defective?	-	Jump to Operation 7	Jump to operation 8
7	Install a new oil pressure sensor. Has the renovation been completed?	-	Jump to operation 1	-
8	Check the oil pressure switch. Is the oil pressure indicator inaccurate or defective?	-	Go to operation 9	Jump to operation 10
9	Install a new oil pressure switch. Has the renovation been completed?	-	Jump to operation 1	-
10	Check engine oil. Is the engine oil in the crankcase thin or of the wrong viscosity?	-	Go to operation 11	Go to operation 12
11	Fill with new engine oil with a viscosity suitable for expected temperatures. Has the renovation been completed?	-	Jump to operation 1	-
12	Check the oil pump. Is the pump worn or dirty?	-	Jump to operation 13	Go to operation 14
13	Replace oil pump. Has the renovation been completed?	-	Jump to operation 1	-
14	Check the oil filter. Is the oil filter clogged?	-	Jump to operation 15	Jump to operation 16
15	Install a new oil filter. Has the renovation been completed?	-	Jump to operation 1	-
16	Check the oil filter mesh. Is the oil filter screen loose or clogged?	-	Go to operation 17	Go to operation 18
17	Tighten or replace the oil filter screen as needed. Has the renovation been completed?	-	Jump to operation 1	-
18	Check the oil pipe. Are there holes in the oil pipe?	-	Jump to operation 19	Jump to operation 20
19	Replace oil pipe. Has the renovation been completed?	-	Jump to operation 1	-
20	Check bearing clearances. Are the bearing clearances greater than the specified values?	Oil clearance of the crankshaft main bearing shell 0.024 ~ 0.042 mm (0.00094 ~ 0.00115 inch)	Jump to Operation 21	Go to operation 22
21	Replace bearing if necessary. Has the renovation been completed?	-	Jump to operation 1	-
22	Check lubrication channels. Are the lubrication channels broken, porous or clogged?	-	Jump to operation 23	Jump to Operation 24
23	Repair or replace the engine block. Has the renovation been completed?	-	Jump to operation 1	-
24	Check the plugs of the lubrication channels. Are there any missing or incorrectly installed lubrication port plugs?	-	Jump to operation 25	Go to operation 26
25	Install or repair end caps as needed. Has the renovation been completed?	-	Jump to operation 1	-
26	Check the camshaft. Is the camshaft worn or poorly machined?	-	Go to operation 27	System OK
27	Replace camshaft. Has the renovation been completed?	-	Jump to operation 1	-

Oil Leak Diagnosis

Most oil leaks are easily identified and repaired by inspecting and replacing or repairing the necessary parts. In some cases, fluid leaks are difficult to detect or fix. The following procedures will help you locate and repair most leaks.

Leak detection:

1. Identify the liquid. Determine if the fluid is engine oil, automatic transmission fluid, power steering fluid, etc.
2. Determine where the leak is coming from.
1. After driving the car at normal operating temperature, park the car over a large piece of paper.
2. Wait a few minutes.
3. Establish the approximate location of the leak on the paper.


3. Inspect questionable components. Check all gasket mating surfaces for leaks. To detect leaks in hard-to-reach places, it is recommended to use a mirror.
4. If the leak is still not detectable, it is necessary to clean the doubtful places with a degreaser, steam or aerosol solvent.
1. Thoroughly clean the suspected leak area.
2. Dry the area of suspected leakage.
3. Drive several miles at normal operating temperature and at various speeds.
4. After the trip, inspect the questionable component.
5. If you can't locate the leak, try using the powder, invisible light, and staining method.

Powder method:

1. Clean up the suspected leak area.
2. Apply aerosol powder (e.g. foot powder) to the area of suspected leakage.
3. Drive under normal operating conditions.
4. Inspect the questionable component. Follow the leak path over the white powder surface to the source.

Invisible Highlight and Dyeing Method:

Leak detection dye and illumination kits are commercially available. Follow the manufacturer's instructions when using the kit.

1. Pour the required amount of paint into the engine oil filler tube.
2. Drive under normal operating conditions as indicated in the kit instructions.
3. Point the light at the suspected leak area. The colored liquid will show the path to the source of the leak in yellow.

Elimination of leakage

Once the origin of the leak has been determined and traced to its source, the cause of the leak must be determined in order to carry out the necessary repairs. If the gasket is replaced but the sealing flange is bent, a new gasket will not stop the leak. The bent flange also needs to be repaired. Before attempting to repair a leak, check the following conditions and correct them as they may be causing the leak.

Gaskets:

• Fluid level/pressure too high.
• The crankcase ventilation system is faulty.
• Clamps not properly tightened, thread dirty or damaged.
• Flanges or sealing surface warped.
• The sealing surface has scratches, burrs or other damage.
• The gasket is damaged or worn.
• The component is broken or has porosity.
• A defective seal was used (if applicable).

Seals:

• Fluid level/pressure too high.
• The crankcase ventilation system is faulty.
• The seal bore is damaged, scratched, deformed, or worn.
• The seal is damaged or worn.
• There are signs of incorrect installation.
• There are cracks in the component.
• The shaft surface is scratched, worn or damaged.
• A loose or worn bearing causes increased seal wear.