2. Start the engine and verify that the low oil pressure indicator on the instrument panel is off and the oil pressure gauge is normal.
3. Listen to the engine for extraneous noise or knocks.
4. Check the following:
- The presence of moisture or fuel in the oil.
- The mismatch of oil viscosity to a certain temperature.
- Serviceability of the engine oil pressure indicator.
- Clogged oil filter.
- Faulty oil bypass valve.
5. Remove the oil pressure sensor or any oil line plug in the cylinder block.
6. Install the EN-21867-850 adapter with oil gauge and measure the oil pressure.
7. Compare the received values with the specification (see section «Service data and specification» at the end of the chapter).
8. If the oil pressure is below normal, check the following:
- Oil pump for wear or contamination.
- Bolts of fastening of a forward cover of the engine regarding easing.
- Oil intake channel for blockages and loose fastenings.
- The gasket between the oil pump pipe and the oil intake for damage or missing.
- The presence of cracks, porosity or blockages in the oil lines.
- Oil pump drive and driven gears for damage.
- Serviceability of the bypass valve of the lubrication system.
- Clearance in crankshaft bearings.
- Oil lines for blockages or improper installation.
- Hydraulic lifters for damage.
- Oil cooler for blockages.
- Oil cooler O-rings for damage or loss.
- Oil jets to cool the pistons for damage.
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