Rear main engine oil leak

2004 CHEVROLET 2500
135,460 MILES • V8
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JACK ZERKIE
  • MEMBER
  • 1 POST
How do I repair this?
Nov 5, 2021 at 12:01 PM
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JACOBANDNICKOLAS
  • ASE Certified Mechanic
  • 110,193 POSTS
  • ASE Certified Mechanic
Hi,

If the leak is truly the rear main oil seal on the engine, the only way to fix it would be to replace the rear main seal. This can be a big job.

I'm not sure what engine you have in the vehicle, but if it is the 6.0L, it is a one-piece seal and will require the removal of the transmission and flex plate/flywheel. See pic below.

Let me know the engine size, transmission type, and if it is 4w.

Take care,

Joe

See pic below.
Nov 5, 2021 at 8:55 PM
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