GM Cutlass RWD 1970-1987 Repair Guide

Oil Pan

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REMOVAL & INSTALLATION



See Figures 1, 2, 3 and 4

L-6 Engine
  1. Disconnect the battery ground cable.
  2.  
  3. Remove the upper radiator support and the bracket to the upper hose. On cars with air-conditioning, remove the fan and clutch assembly.
  4.  
  5. Remove the fuel line at the fuel pump and the starter leads at the starter.
  6.  
  7. Raise the car and support it with jackstands. Drain the oil.
  8.  
  9. Remove the front motor mount bracket to motor mount bolts.
  10.  
  11. Remove the flywheel cover and the starter. Disconnect the automatic transmission linkage, if so equipped.
  12.  
  13. Disconnect the exhaust pipe at the manifold.
  14.  
  15. Position the timing mark in the six o'clock position.
  16.  
  17. Raise the engine with a jack at the crankshaft damper and remove the right engine mount with bracket.
  18.  
  19. Remove the oil pan attaching bolts and the oil pan. It may be necessary to raise the engine further to get the pan out. Be careful not to damage any cowl-mounted parts.
  20.  

To install:
  1. Use gasket sealer and new gaskets (if gaskets are used).Torque the pan bolts to 14 ft. lbs.(18Nm).
  2.  
  3. Lower the engine with a jack under the crankshaft pulley mounting.
  4.  
  5. Install the right engine mount and bracket.
  6.  
  7. Install the flywheel cover, the starter, and the transmission shift linkage. Install the exhaust manifold, fuel line, and radiator support and bracket.
  8.  
  9. Lower the vehicle
  10.  
  11. Refill the engine with oil.
  12.  
  13. Connect the negative battery cable.
  14.  
  15. Check for leaks
  16.  



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Fig. Fig. 1: Remove the flywheel cover



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Fig. Fig. 2: Remove the exhaust crossover pipe

Buick Built Engines
  1. Raise the car and support it with jackstands
  2.  
  3. Drain the oil.
  4.  
  5. Remove the flywheel cover.
  6.  
  7. Remove the exhaust crossover pipe.
  8.  
  9. Remove the oil pan attaching bolts and remove the oil pan.
  10.  

To install:
  1. Install the oil pan and connect the exhaust crossover pipe
  2.  
  3. Install the flywheel cover
  4.  
  5. Lower the vehicle
  6.  
  7. Refill the engine with oil
  8.  
  9. Check for leaks
  10.  



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Fig. Fig. 3: Make sure all the oil is drained before removing the oil pan bolts



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Fig. Fig. 4: Remove the oil pan from the vehicle

V8 Chevrolet Built Engines
  1. Disconnect battery ground cable.
  2.  
  3. Remove distributor cap.
  4.  
  5. Remove radiator upper mounting panel or fan shroud.
  6.  
  7. Remove fan.
  8.  
  9. Raise vehicle and support it with jackstands
  10.  
  11. Drain engine oil.
  12.  
  13. Disconnect exhaust or crossover pipes.
  14.  
  15. Remove converter housing underpan and splash shield. On cars with manual transmission, remove the starter, then remove the flywheel cover.
  16.  
  17. Rotate crankshaft until timing mark on torsional damper is at 6:00 o'clock position.
  18.  
  19. Remove front engine mount through bolts.
  20.  
  21. Raise engine and insert blocks under engine mounts.
  22.  
  23. Remove oil pan.
  24.  

To install:
  1. Install pan and front engine mount through bolts.
  2.  
  3. Connect starter, splash shield and convertor housing underpan,Install exhaust crossover pipes at the engine.
  4.  
  5. Install distributor cap and radiator mounting panel or shroud
  6.  
  7. Lower vehicle
  8.  
  9. Refill with engine oil and connect negative battery cable
  10.  
  11. Check for leaks
  12.  

V8 Oldsmobile Built Gasoline Engines Except 455
  1. Remove the distributor cap and align the rotor to No. 1 firing position. On 1978 and later models, align the timing marks so No. 1 is at top dead center.
  2.  
  3. Disconnect the battery ground cable and remove the dipstick.
  4.  
  5. Remove the upper radiator support and the fan shroud attaching screws.
  6.  
  7. Raise the vehicle and support it with jackstands
  8.  
  9. Drain the oil.
  10.  
  11. Remove the flywheel cover.
  12.  
  13. Remove the starter motor assembly.
  14.  
  15. Disconnect the exhaust pipes and the crossover pipe.
  16.  
  17. Disconnect the engine mounts and raise the front of the engine as far as possible.
  18.  
  19. Remove the oil pan attaching bolts and remove the pan.
  20.  

To install: