GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Impala 🢒 Engine 🢒 Engine Cooling 🢒 Engine Coolant Crossover Pipe Replacement

Engine Coolant Crossover Pipe Replacement LZE, LZ4, LZ8

Removal Procedure

    Object Number: 1616589 Size: SH
  1. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement or Intake Manifold Cover Replacement.
  2. Remove the generator. Refer to Generator Replacement.
  3. Remove the drive belt idler pulleys. Refer to Drive Belt Idler Pulley Replacement or Drive Belt Idler Pulley Replacement.
  4. Remove the power steering pump. Refer to Power Steering Pump Replacement.
  5. Reposition the coolant recovery reservoir hose clamp at the fill tube fitting.
  6. Remove the coolant recovery reservoir hose from the fill tube fitting. Position the hose out of the way.

    7. Object Number: 1613132 Size: SH
  7. Reposition the radiator inlet hose clamp at the crossover pipe (3.5L shown, 3.9L similar).
  8. Remove the radiator inlet hose from the crossover pipe.

    9. Object Number: 1584078 Size: SH
  9. Reposition the thermal bypass hose clamp at the crossover pipe.
  10. Remove the thermal bypass hose from the crossover pipe.

    11. Object Number: 1584086 Size: SH
  11. Remove the coolant crossover pipe bolts (2, 3, 4).
  12. Remove the coolant crossover pipe.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1584086 Size: SH
  1. Position the coolant crossover pipe to the cylinder heads.
  2. Install the coolant crossover pipe bolts (2, 3, 4).

    3. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).


    Object Number: 1584078 Size: SH
  3. Install the thermal bypass hose to the crossover pipe.
  4. Position the thermal bypass hose clamp at the crossover pipe.

    5. Object Number: 1613132 Size: SH
  5. Install the radiator inlet hose to the crossover pipe (3.5L shown, 3.9L similar).
  6. Position the radiator inlet hose clamp at the crossover pipe.

    7. Object Number: 1616589 Size: SH
  7. Install the coolant recovery reservoir hose to the fill tube fitting.
  8. Position the coolant recovery reservoir hose clamp at the fill tube fitting.
  9. Install the power steering pump. Refer to Power Steering Pump Replacement.
  10. Install the drive belt idler pulleys. Refer to Drive Belt Idler Pulley Replacement or Drive Belt Idler Pulley Replacement.
  11. Install the generator. Refer to Generator Replacement.
  12. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement or Intake Manifold Cover Replacement.