Oil Pressure Drop
OIL PRESSURE DROPPossible Causes
1. Low oil level.
2. Faulty oil pressure sending unit.
3. Low oil pressure.
4. Clogged oil filter.
5. Worn parts in oil pump.
6. Thin or diluted oil.
7. Excessive bearing clearance.
8. Oil pump relief valve stuck.
9. Oil pump suction tube loose, bent cracked, or blocked.
10. Oil pump cover warped or cracked.
Correction
1. Check engine oil level.
2. Install new sending unit.
3. Check sending unit and check main bearing oil clearance.
4. Install new oil filter.
5. Replace worn parts or pump.
6. Change oil to correct viscosity.
7. Measure bearings for correct clearance.
8. Remove valve and inspect, clean and install.
9. Remove oil pan and install new tube, or clean if necessary.
10. Install new oil pump.