What Causes Low Engine Oil Pressure?

[AdelineLee]

Reasons for low engine oil pressure: 1. Insufficient oil level or low oil viscosity; 2. Poor performance of the oil pump; 3. The pressure relief valve of the oil pump is too soft or improperly adjusted; 4. Clogged oil filter, or the bypass valve spring of the oil filter is too soft; 5. Oil leakage in the lubrication system oil passages or at various sealing points; 6. Excessive clearance in the crankshaft main bearings, connecting rod bearings, or camshaft bearings; 7. Failure of the oil pressure indicator light or pressure switch; 8. Damaged cylinder head gasket, cracks in the cylinder head or block causing coolant to leak into the oil pan. After starting the engine, if the oil pressure indicator light does not come on but lights up after running for a while, you should pull out the dipstick to check the oil level in the oil pan and inspect the oil for water droplets or a gasoline smell. If necessary, add oil, replace the cylinder head gasket, or check the sealing between the pistons and cylinders.