GM 12 cyl Engine Tear Sown

Engine  Tear Down Report:

Before

Before

After

After

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When I arrived to shop at 8:00 the engine was already in dismantling process. They work late at night.

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The gear blower covers are damaged on both blower, the covers do not affect the blower function but will be replaced. The blowers turn free.

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GENERALITIES:

  • Both engines were received without the exhaust manifold.
  • The gear blower covers are damaged on both engines.
  • Both engines are not equipped with EPD (engine protective device).
  • Both engines are built with crab nuts to hold the power assemblies.
  • Both crankshafts are not equipped with bolt on stub shaft.
  • The cylinder heads are mostly type 4.
  • The engine was received with PN 8349064 Water Elbow Inlet Left Bank missing.
  • The cylinder heads on the second engine are type 2, very old.
  • The first engine is equipped with a spring type crankshaft damper.
  • The second engine was received without the engine governor, PN 8215509 Lever Governor to Control Rod missing and 2 PN 8104467 Fuel Filter Clevis assembly, 2 PN 8361381 Fuel Filter Bowl By-pass Sight Glass.
  • Both engines were stored outside without protection, water was found into the power assemblies and crankcase thus causing damage to some parts, see detailed engine tear down report.

 

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IMG_2 Due to water ingress into the engine the camshafts are rusted at several places.

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No apparent defect and wear on the valve lever shafts, like new.

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No defect found with the strainers housing, it is complete, no parts missing.

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No visual defect found with the gear train.

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No visual defect found with the gear train.

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The crankshaft is equipped with a spring type damper.

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The crankshaft on both engines is not equipped with bolt on stub shaft. No visual defect found on the crankshaft.

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The retainer tram oil was not installed as per MI, it rubbed against the crankshaft hub. The retainer must be replaced.

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The crankshaft hub is damaged but it should be re-usable.

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Both water pump impellers must be replaced due to oversize shaft bore. No other visual defects were noted on this engine.

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