2003 Chevrolet Silverado Oil pump

Tiny
BARN2112
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 69,000 MILES
How exactly do you prime the oil pump?
Thursday, June 18th, 2015 AT 2:38 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,864 POSTS
It's driven by the crankshaft snout. Gotta rotate the engine to drive the oil pump. I prefer to bypass the starter relay to spin the engine with no spark or fuel for a newly-rebuilt engine. Of course the bearings and cylinder walls will have been coated with engine assembly lube, so even if you just start the engine, the vital parts will be lubricated. If you're just replacing the oil pump, the passages are already full of oil. Just start the engine like normal.
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Thursday, June 18th, 2015 AT 3:24 PM

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