AMC Coupes/Sedans/Wagons 1975-1988 Repair Information

Oil Pan

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REMOVAL & INSTALLATION



It is much easier to remove the engine in most cases.

4-121 Engine See Figure 1

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Fig. Fig. 1: Exploded view of the engine lubrication system components4-121 engine

  1. Raise the car and support it with stands. Drain the oil.
  2.  
  3. Install an engine lifting device and support weight of the engine, while removing the engine bracket to mount cushion nuts. Loosen the strut and bracket screws.
  4.  
  5. Raise the engine approximately 2 in. and remove the crossmember to sill attaching parts.
  6.  
  7. Remove the steering gear idler bracket from the frame rail.
  8.  
  9. Pry the crossmember down and insert wooden blocks between the crossmember and the side sill on both sides.
  10.  
  11. Remove the oil pan and clean the gasket from the mating surfaces of the block and oil pan.
  12.  

To install:
  1. Cement the gasket to the engine block; use sealer between side gaskets and end seals.
  2.  
  3. Install the oil pan. Tighten the side pan bolts to 80 in.lb. and the end bolts to 90 in.lb.
  4.  
  5. Install the steering gear idler bracket on the frame rail.
  6.  
  7. Remove the blocks and install the crossmember-to-sill attaching parts.
  8.  
  9. Tighten the strut and bracket screws. Install the engine bracket-to-mount cushion nuts.
  10.  
  11. Replace the engine oil.
  12.  

4-150 Engine See Figure 2

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Fig. Fig. 2: Common oil pan, gasket and seal4-150 engine

  1. Turn the steering wheel to full left lock. Support the engine with a hoist. Raise and support the car at the side sills. Disconnect the engine ground cable. Drain the oil.
  2.  
  3. Unbolt the steering idler arm at the side sill, and the engine cushions at the brackets.
  4.  
  5. Remove the sway bar, if equipped. Remove the front crossmember-to-side sill bolts and pull the crossmember down. Remove the right engine bracket. Loosen but do not remove the strut rods at the lower control arm.
  6.  
  7. Disconnect the exhaust pipe at the manifold.
  8.  
  9. Remove the starter.
  10.  
  11. Remove the bell housing access plate.
  12.  
  13. Unbolt and remove the oil pan.
  14.  

To install:
  1. Clean the gasket surfaces thoroughly.
  2.  
  3. Install a replacement seal at the bottom of the timing case cover and at the rear bearing cap.
  4.  
  5. Using new gaskets coated with sealer, install the pan and torque the bolts to 10 ft. lbs.
  6.  
  7. Install all other parts in reverse order of removal.
  8.  

4-151 Engine See Figure 3

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Fig. Fig. 3: Lubrication system components4-151 engine

  1. Follow Steps 1 through 6 of the 4-121 procedure.
  2.  
  3. To install the pan, thoroughly clean all the gasket mating surfaces.
  4.  
  5. Install a new rear oil pan gasket in the rear main bearing cap. Apply a small quantity of RTV silicone sealer into the depressions where the rear pan gasket engages the block.
  6.  
  7. Install a new from oil pan gasket onto the timing gear cover. Press the tips into the holes in the cover.
  8.  
  9. Install the side gaskets onto the block, not the oil pan. Retain them with a thin film of grease. Apply a 1 / 4 in. (6mm) long bead of RTV silicone sealer to the split lines of the front and side gaskets; the bead should be 1 / 8 in. (3mm) wide.
  10.  
  11. Install the oil pan onto the engine. The timing cover bolts should be installed last. They are installed at an angle; the holes will line up after the rest of the pan bolts have been snugged down. The bolts should be tightened to 6 ft. lbs. all around. The rest of installation is the reverse of removal.
  12.  

6- and 8-Cylinder Engines

EXCEPT PACER

CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Turn the steering wheel to full left lock. Support the engine with a hoist. Raise and support the car at the side sills. Disconnect the engine ground cable.
  2.  
  3. Unbolt the steering idler arm at the side sill, and the engine cushions at the brackets.
  4.  
  5. Remove the sway bar, if equipped. Remove the front crossmember-to-side sill bolts and pull the crossmember down. Remove the right engine bracket. Loosen but do not remove the strut rods at the lower control arm.
  6.  
  7. Drain the engine oil.
  8.  
  9. Remove the starter.
  10.  
  11. Remove the oil pan bolts and pan. Remove the front and rear seats, and clean the gasket surfaces.
  12.  

To install:
  1. Install the new pan front seal to the timing cover, and apply sealer to end tabs. Cement new pan side gaskets to the block, and apply sealer to the ends of the gasket.
  2.  
  3. Coat the inside surface of the new rear seal with soap, and apply sealer to end tabs. Install the seal in the rear main cap.
  4.  
  5. Coat front and rear seal contact surfaces with engine oil, and install the pan. The remainder of the installation is the reverse of removal.
  6.  

PACER

See Figure 4

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Fig. Fig. 4: Disconnect the front engine support mounts to gain access to the oil pan on Pacer models

  1. Drain the engine oil.
  2.  
  3. Install an engine lifting device and support the weight of the engine.
  4.  
  5. Disconnect the steering shaft flexible joint and hold it aside with a length of wire.
  6.  
  7. Raise and support the car.
  8.  
  9. Remove the front engine support through bolts.
  10.  
  11. Disconnect the front brake lines at the wheel cylinders.
  12.  
  13. Disconnect the upper ball joints from the spindles. Make sure the shock absorbers are attached securely.
  14.  
  15. Remove the upper control arm and move it aside.
  16.  
  17. Support the front crossmember with a jack.
  18.  
  19. Remove the nuts from the front crossmember rear mounts and swing the crossmember down and forward.
  20.  
  21. Follow Steps 5-9 of the preceding 6-cylinder and V8 procedure.
  22.  

To install:
  1. Install and assemble the remaining components in the reverse order of removal, tightening the 1 / 4 in. oil pan screws to 7 ft. lbs., the 5 / 16 in. oil pan screws to 11 ft. lbs., the crossmember attaching nuts to 50 ft. lbs., the upper control arm cross shaft bolt and nut to 60 ft. lbs., and the engine mount and steering shaft nuts to 25 ft. lbs. Fill the crankcase with oil and bleed the brakes.
  2.  

 
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