1999 Dodge Truck oil pressure

1999 DODGE TRUCK
181,000 MILES • V8 • 2WD • AUTOMATIC
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RWF
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  • 1 POST
after driving 10-20miles the oil pressure gauge drops to 0. I don't run it. I have changed the sending unit and the oil pump still have problem. truck just sits
Jan 21, 2008 at 6:46 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Well test out the oil pressure and find what the oil pump is doing.

The oil pump itself does not create pressure. It produces flow and the resistance to that flow produces pressure. Resistance is created by the orifices in the engine block through which the oil flows, and the amount of clearance between the bearings and crankshaft journals. As the bearings wear, clearances increase allowing increased flow which reduces pressure.
Jan 22, 2008 at 5:36 PM
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