Chevrolet Citation/Omega/Phoenix/Skylark 1980-1985 Repair Guide

Oil Pan

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REMOVAL & INSTALLATION



Four Cylinder


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Fig. Fig. 1 Exploded view of the oil pan and pump mounting-4-cylinder engine shown

  1. Raise and support the car. Drain the oil.
  2.  
  3. Remove the engine cradle-to-front engine mounts.
  4.  
  5. Disconnect the exhaust pipe at both the exhaust manifold and at the rear transaxle mount.
  6.  
  7. Disconnect and remove the starter. Remove the flywheel housing or torque converter inspection cover.
  8.  
  9. Remove the alternator upper bracket.
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  11. Install an engine lifting chain and raise the engine.
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  13. Remove the lower alternator bracket. Remove the engine support bracket.
  14.  
  15. Remove the oil pan retaining bolts and remove the pan.
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  17. Reverse the procedure to install. Clean all gasket surfaces thoroughly. Install the rear oil pan gasket into the rear main bearing cap, then apply a thin bead of silicone sealer to the pan gasket depressions. Install the front pan gasket into the timing cover. Install the side gaskets onto the block, not the oil pan. They can be retained in place with grease. Apply a thin bead of silicone seal to the mating joints of the gaskets. Install the oil pan; install the timing gear bolts last, after the other bolts have been snugged down.
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Six Cylinder
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the oil dipstick and tube.
  4.  
  5. Raise and support the car. Drain the oil into a suitable container.
  6.  
  7. Remove the exhaust crossover pipe.
  8.  
  9. On cars with an automatic transaxle, remove the converter housing underpan. On cars with a manual transaxle, remove the clutch housing cover, then remove the engine mounting bracket-to-engine mount nuts and raise the front of the engine 3 / 4 in.
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  11. Remove the starter.
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  13. Remove the oil pan and discard the gaskets and seals.
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  15. Before installing the pan, make sure that all the mating surfaces are free of oil and dirt, and remove any traces of old silicone seal.
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  17. Apply a 1 / 8 in. bead of silicone seal to the oil pan sealing flange.
  18.  
  19. Use a new oil pan rear seal. Install the pan against the cylinder case and attach with the retaining bolts. Tighten the smaller oil pan bolts to 6-9 ft. lbs., and the larger bolts to 14-22 ft. lbs. (8-12 and 19-30 Nm, respectively).
  20.  
  21. Lower the front of the engine, if it was raised (manual transaxle cars only), and install the retaining nuts.
  22.  
  23. Install the starter, converter or clutch housing cover, the exhaust crossover, and lower the car. Fill the crankcase with oil, connect the negative battery cable, start the engine and check for leaks.
  24.  

 
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