Chevrolet Blazer/Jimmy 1969-1982 Repair Guide

Oil Pan

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REMOVAL & INSTALLATION



Six Cylinder Engines
  1. Disconnect the battery ground cable.
  2.  
  3. Raise and support the vehicle. Disconnect the starter leaving the wires attached and swing it out of the way. Leave the starter in place on 1976 automatic transmission models.
  4.  
  5. Remove the flywheel or converter cover.
  6.  
  7. Drain the engine oil.
  8.  


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. On models through 1975, there may be enough clearance to remove the oil pan without raising the engine. If there isn't, remove the bolts securing the engine mounts to the crossmember and raise the engine high enough to insert a 2 in. X 4 inch piece of wood between the engine mounts and the crossmember brackets.
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  3. On 1976 and later models:
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    1. Remove the front engine mount through bolts.
    2.  
    3. Using a floor jack, raise the engine about three inches.
    4.  
    5. Install the through bolts and tighten them just enough to hold them in place.
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    7. Lower the engine so it rests on the engine mounts in a slightly raised position. This should provide enough clearance.
    8.  

  5. Remove the oil pan attaching screws.
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  7. Remove the oil pan.
  8.  
  9. Clean all gasket surfaces and install a new seal in the rear main bearing groove and a new seal in the crankcase front cover. Installation is the reverse of removal. Install new side gaskets on the block, but do not use sealer. Fill the engine with oil and run the engine, checking for leaks.
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V8 Engines
  1. Drain the engine oil.
  2.  
  3. On models through 1978, remove the oil dipstick and tube.
  4.  
  5. If necessary, remove the exhaust pipe crossover.
  6.  
  7. If equipped with automatic transmission, remove the converter housing pan.
  8.  
  9. On models through 1978, remove the starter brace and bolt and swing the starter aside.
  10.  
  11. On 1979 and later four wheel drive models equipped with automatic transmission, remove the strut rods at the engine mounts.
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  13. Remove the oil pan and discard the gaskets.
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  15. Installation is the reverse of removal. Clean all gasket surfaces and use new gaskets to assemble. Use gasket sealer to retain the side gaskets to the cylinder block. Install a new oil pan rear seal in the rear main bearing cap slot with the ends butting the side gaskets. Install a new front seal in the crankcase front cover with the ends butting the side gaskets. Reassemble, fill the engine with oil and check for leaks.
  16.  

Diesel Engine
  1. Disconnect the batteries, raise the car and drain the oil.
  2.  
  3. Remove the transmission dust cover.
  4.  
  5. Remove the oil pan bolts.
  6.  
  7. Remove the left side engine mount thru-bolt.
  8.  
  9. Raise the engine and remove the oil pan.
  10.  
  11. Clean the entire sealing surface and apply a 3 / 32 inch bead of sealer. The sealer must be wet to the touch when the pan bolts are tightened down.
  12.  
  13. Install the oil pan and tighten the bolts to 15 ft. lbs.
  14.  
  15. Lower the engine and install the engine mount thru-bolt.
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  17. Install the transmission dust cover and lower the car.
  18.  
  19. Refill with oil and connect the batteries.
  20.  

 
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