Checking oil pressure (Chevrolet Captiva 1)

Checking oil pressure

Step	Operation	Values	Yes	No
1	Is the oil pressure light on?	-	Jump to operations 2	The system is normal
2	Check the oil level in the crankcase. Is the oil level low?	-	Jump to operations 3	Jump to operations 4
3	Add oil up to the level mark on the indicator. Is the renovation finished?	-	Jump to operations 1	-
4	Check the idle speed. Is the idle speed below the set value?	840±20 rpm	Jump to operations 5	Jump to operations 6
5	Increase idle speed. Has the idle speed increased?	-	Jump to operations 1	-
6	Check the oil pressure sensor. Is your oil pressure sensor inaccurate or faulty?	-	Jump to operations 7	Jump to operations 8
7	Install a new oil pressure sensor. Is the renovation finished?	-	Jump to operations 1	-
8	Check the oil pressure indicator. Is your oil pressure gauge inaccurate or faulty?	-	Jump to operations 9	Jump to operations 10
9	Install a new oil pressure switch. Is the renovation finished?	-	Jump to operations 1	-
10	Check the engine oil. Is the engine oil in the crankcase thin or of the wrong viscosity?	-	Jump to operations 11	Jump to operations 12
11	Fill with new engine oil of a viscosity appropriate for the expected temperatures. Is the renovation finished?	-	Jump to operations 1	-
12	Check the oil pump. Is the pump worn out or dirty?	-	Jump to operations 13	Jump to operations 14
13	Replace the oil pump. Is the renovation finished?	-	Jump to operations 1	-
14	Check the oil filter. Is the oil filter clogged?	-	Jump to operations 15	Jump to operations 16
15	Install a new oil filter. Is the renovation finished?	-	Jump to operations 1	-
16	Check the oil filter mesh. Is the oil filter mesh loose or clogged?	-	Jump to operations 17	Jump to operations 18
17	Tighten or replace the oil filter screen if necessary. Is the renovation finished?	-	Jump to operations 1	-
18	Check the oil pipe. Are there any holes in the oil pipe?	-	Jump to operations 19	Jump to operations 20
19	Replace the oil pipe. Is the renovation finished?	-	Jump to operations 1	-
20	Check the bearing clearances. Are the bearing clearances greater than the specified values?	Crankshaft Main Bearing Shell Oil Clearance 0.024~0.042mm (0.00094~0.00115in)	Jump to operations 21	Jump to operations 22
21	Replace the bearing if necessary. Is the renovation finished?	-	Jump to operations 1	-
22	Check the lubrication channels. Are the lubrication passages broken, porous or clogged?	-	Jump to operations 23	Jump to operations 24
23	Repair or replace the engine block. Is the renovation finished?	-	Jump to operations 1	-
24	Check the lubrication channel plugs. Are there any missing or improperly installed oil channel plugs?	-	Jump to operations 25	Jump to operations 26
25	Install or repair plugs if necessary. Is the renovation finished?	-	Jump to operations 1	-
26	Check the camshaft. Is the camshaft worn or poorly machined?	-	Jump to operations 27	The system is normal
27	Replace the camshaft. Is the renovation finished?	-	Jump to operations 1	-

Oil Leak Diagnosis

Most oil leaks are easy to identify and fix 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 find and fix most leaks.

Leak Detection:

1. Identify the fluid. Determine what kind of fluid it is - motor oil, automatic transmission fluid, power steering fluid, etc.
2. Determine where the leak is coming from.
1. After driving the vehicle at normal operating temperature, park the vehicle over a large sheet of paper.
2. Please wait a few minutes.
3. Locate the approximate location of the leak by dripping it onto the paper.


3. Inspect suspect components. Check all mating surfaces of gaskets for leaks. It is recommended to use a mirror to detect leaks in hard to reach places.
4. If the leak still cannot be found, it is necessary to clean the suspected areas with a degreaser, steam or aerosol solvent.
1. Thoroughly clean the suspected leak area.
2. Dry the suspected leak area.
3. Drive the vehicle for several miles at normal operating temperature and various speeds.
4. After the trip, inspect the questionable component.
5. If you can't locate the leak, try using powder, invisible light, and dye methods.

Powder method:

1. Clean the suspected leak area.
2. Apply aerosol powder (for example, foot powder) to the area of the suspected leak.
3. Drive under normal operating conditions.
4. Inspect the suspect component. Follow the leak path along the white powder surface to the source.

Invisible lighting and coloring method:

Dye and light kits are available for leak detection. Follow the manufacturer's instructions when using the kit.

1. Pour the required amount of paint into the engine oil filler tube.
2. Ride the vehicle under normal operating conditions as specified in the kit instructions.
3. Shine a light on the suspected leak area. The coloured liquid will show the path to the leak source in yellow.

Fixing the leak

Once the origin of the leak has been identified and traced back to its source, the cause of the leak must be determined so that the necessary repairs can be made. If the gasket is replaced but the sealing flange is bent, a new gasket will not fix the leak. The bent flange must also be repaired. Before attempting to fix the leak, check for and correct the following conditions as they may be the cause of the leak.

Gaskets:

• Fluid level/pressure too high.
• The crankcase ventilation system is faulty.
• Clamps are not tightened correctly, threads are dirty or damaged.
• Flanges or sealing surface are warped.
• There are scratches, unevenness or other damage on the sealing surface.
• The gasket is damaged or worn out.
• The component is broken or porous.
• A defective seal was used (if applicable).

Seals:

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