Oil Pressure Test: Troubleshooting
TROUBLESHOOTING
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| 1 | Is the oil pressure warning lamp ON? | - | Go to Step 2 | System OK |
| 2 | Check the oil level in the crankcase. Is the oil level low? |
- | Go to Step 3 | Go to Step 4 |
| 3 | Add oil so that the oil level is up to the full mark on the indicator. Is the repair complete? |
- | Go to Step 1 | - |
| 4 | Check the idle speed. Is the idle speed below the specified value? |
825 rpm | Go to Step 5 | Go to Step 6 |
| 5 | Increase the idle speed. Is the speed increased? |
- | Go to Step 1 | - |
| 6 | Inspect the oil pressure switch. Is the oil pressure switch incorrect or malfunctioning? |
- | Go to Step 7 | Go to Step 8 |
| 7 | Install a new oil pressure switch. Is the repair complete? |
- | Go to Step 1 | - |
| 8 | Inspect the oil pressure gauge. Is the oil pressure gauge incorrect or malfunctioning? |
- | Go to Step 9 | Go to Step 10 |
| 9 | Install a new oil pressure gauge. Is the repair complete? |
- | Go to Step 1 | - |
| 10 | Inspect the engine oil. Is the engine oil in the crankcase diluted or of the improper viscosity? |
- | Go to Step 11 | Go to Step 12 |
| 11 | Install new engine oil of the proper viscosity for the expected temperatures. Is the repair complete? |
- | Go to Step 1 | - |
| 12 | Inspect the oil pump. Is the pump worn or dirty? |
- | Go to Step 13 | Go to Step 14 |
| 13 | Replace the oil pump. Is the repair complete? |
- | Go to Step 1 | - |
| 14 | Inspect the oil filter. Is the oil filter plugged? |
- | Go to Step 15 | Go to Step 16 |
| 15 | Install a new oil filter. Is the repair complete? |
- | Go to Step 1 | - |
| 16 | Inspect the oil pickup screen. Is the oil pickup screen loose or plugged? |
- | Go to Step 17 | Go to Step 18 |
| 17 | Tighten or replace the oil pickup screen, as necessary. Is the repair complete? |
- | Go to Step 1 | - |
| 18 | Inspect the oil pickup tube. Are there any holes in the oil pickup tube? |
- | Go to Step 19 | Go to Step 20 |
| 19 | Replace the oil pickup tube. Is the repair complete? |
- | Go to Step 1 | - |
| 20 | Inspect the bearing clearances. Are the bearing clearances more than the specified values? |
Crankshaft 0.015 - 0.040 mm (0.00059 - 0.00157 in.) Connecting Rod 0.019 - 0.070 mm (0.0007 - 0.0027 in.) | Go to Step 21 | Go to Step 22 |
| 21 | Replace the bearing, if necessary. Is the repair complete? |
- | Go to Step 1 | - |
| 22 | Inspect the oil galleries. Are the oil galleries cracked, porous, or plugged? |
- | Go to Step 23 | Go to Step 24 |
| 23 | Repair or replace the engine block. Is the repair complete? |
- | Go to Step 1 | - |
| 24 | Inspect the gallery plugs. Are any of the gallery plugs missing or installed improperly? |
- | Go to Step 25 | Go to Step 26 |
| 25 | Install the plugs or repair, as necessary. Is the repair complete? |
- | Go to Step 1 | - |
| 26 | Inspect the camshaft. Is the camshaft worn or is there evidence of poor machining? |
- | Go to Step 27 | System OK |
| 27 | Replace the camshaft. Is the repair complete? |
- | Go to Step 1 | - |