Oil pressure check Ford F150
1. Low engine oil pressure can be a sign of an engine in need of rebuilding. A «low oil pressure» indicator (often called an «idiot light») is not a test of the oiling system. Such indicators only come on when the oil pressure is dangerously low. Even a factory oil pressure gauge in the instrument panel is only a relative indication, although much better for driver information than a warning light. A better test is with a mechanical (not electrical) oil pressure gauge.
Oil pressure sending unit location — 2.7L V6 engine shown, other engines similar
2. Locate the oil pressure sending unit:
- On 2.7L V6 engines, the oil pressure sending unit is located on the passenger’s side cylinder head, near the turbocharger (see illustration).
- On 3.3L and 3.5L V6 engines, the oil pressure sending unit is located near the lower left side of the engine on the oil filter adapter behind the alternator.
- On 5.DL V8 engines, the oil pressure sending unit is located near the lower left side of the engine on the oil filter
3. Unscrew and remove the oil pressure sending unit and screw in the hose for your oil pressure gauge. If necessary, install an adapter fitting. Use Teflon tape or thread sealant on the threads of the adapter and/or the fitting on the end of your gauge’s hose.
4. Connect an accurate tachometer to the engine, according to the tachometer manufacturer’s instructions.
5. Check the oil pressure with the engine running (normal operating temperature) at the specified engine speed, and compare it to this Chapter’s Specifications. If it’s extremely low, the bearings and/or oil pump are probably worn out.