1999-2004 4HE-1 Cylinder Head Replacement Procedure



This PDF file is a 20 page professional  step by step procedure for replacing the cylinder head on model years 1999-2004 Isuzu NPR 4HE-1 Engine.

Procedure includes:

  • Torque and sequence specifications
  • Valve specifications
  • Valve spring testing and specifications
  • Cylinder head distortion measuring and specification
  • Piston projection
  • Head gasket selection
  • Camshaft repalcement (timing)
  • Valve adjustment procedure


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