GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Firefly (Canada) 🢒 Engine 🢒 Engine Mechanical - 1.3L 🢒 Exhaust Manifold Cleaning and Inspection

Important: 

   • Do not reuse the exhaust manifold-to-cylinder head gaskets. Upon installation of the exhaust manifold, install a NEW gasket.
   • A gasket that is incorrectly installed or a leaking exhaust system may affect On-Board Diagnostics (OBD) II system performance.

  1. Clean the exhaust manifold with solvent.

    2. Important: For vehicles equipped with a PUP catalytic converter, do not splash any solvent down into the converter element.

    Caution: Wear safety glasses in order to avoid eye damage.

  2. Dry the exhaust manifold with compressed air.
  3. Inspect for a loose heat shield or for a damaged heat shield.

    4. Object Number: 235498 Size: SH
  4. Clean the exhaust manifold mating surface.
  5. Use a straight edge and a feeler gauge, and measure the exhaust manifold mounting face for warping.

    6. Exhaust Manifold Maximum Warping
    0.70 mm (0.0276 in)

  6. If the warping is greater than the maximum, repair or replace the exhaust manifold.