2003 Chevrolet Trailblazer timing chain

2003 CHEVROLET TRAILBLAZER
4.2L • 6 CYL • 4WD • AUTOMATIC
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TRECIA
  • MEMBER
  • 1 POST
I changed the timing chain and now the oil pump won't engage
Oct 15, 2014 at 9:19 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 POSTS
The oil pump is driven directly from the crankshaft. The drive gear is a slip fit design. Either the gear is bad, the pump is bad, or you forgot something. Did you install the relief valve plug? Were the drive gears correctly installed? Take a look at the pic below and see if anything was missed.
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Oct 15, 2014 at 7:42 PM
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