1999 Dodge Truck oil pressure

Tiny
RWF
  • MEMBER
  • 1999 DODGE TRUCK
  • V8
  • 2WD
  • AUTOMATIC
  • 181,000 MILES
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
Monday, January 21st, 2008 AT 2:46 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 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.
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Wednesday, January 23rd, 2008 AT 1:36 AM

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