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Detroit Diesel 8V71TA Engine Failure Analysis

92 series engine

Detroit D8V71TA Engine Failure

Unfortunately, someone did not rebuild this engine properly 14 months ago. Here is what we found out after tearing into our 8V71TA that was rebuilt only 14 months , or 625 hours of use ago.

Since having it rebuilt in January 2019, we experienced loss of power (less than before the rebuild) , oil leaks, blow-by( oil coming out the breathers) low turbo boost, and multiple turbo failures.

What caused all of this? 2 things:

  1. Fuel system was not pressure tested, leading to damage to bearings and turbo.
  2. The liners were too small for the engine bores.

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