GM Camaro 1967-1981 Repair Guide

Oil Pump

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REMOVAL & INSTALLATION



230 and 250 cid Engines
  1. Remove the oil pan as described earlier in this section.
  2.  
  3. Remove the two flange mounting bolts, the pick-up bolt, then remove the pump and screen together.
  4.  
  5. To install, align the oil pump driveshafts to match with the distributor tang and position the flange over the distributor lower bushing. Install the pump mounting bolts.
  6.  
  7. Install the oil pan.
  8.  

Except 230, 231 cid Engines

  1. Remove the oil pan as described earlier in this section.
  2.  
  3. Remove the pump-to-rear main bearing cap bolts and remove the pump and extension shaft.
  4.  
  5. To install, align the slot on the top end of the extension shaft with the drive tang on the lower end of the distributor driveshaft and install the rear main bearing cap bolt.
  6.  
  7. Position the pump screen so that the bottom edge is parallel to the oil pan rails.
  8.  
  9. Install the oil pan.
  10.  

231 cid Engine

The oil pump is located in the timing chain cover and is connected by a drilled passage to the oil screen housing and pipe assembly in the oil pan. All oil is discharged from the pump to the oil pump cover assembly, on which the oil filter is mounted.

  1. To remove the oil pump cover and gears, first remove the oil filter.
  2.  
  3. Remove the screws which attach the oil pump cover assembly to the timing chain cover.
  4.  
  5. Remove the cover assembly and slide out the oil pump gears. Clean the gears and inspect them for any obvious defects such as chipping or scoring.
  6.  
  7. Remove the oil pressure relief valve cap, spring and valve. Clean them and inspect them for wear or scoring. Check the relief valve spring to see that it is not worn on its side or collapsed. Replace the spring if it seems questionable.
  8.  
  9. Check the relief valve for a correct fit in its bore. It should be an easy slip fit and no more. If any perceptible shake can be felt, the valve and/or the cover should be replaced.
  10.  

To install:
  1. Lubricate the pressure relief valve and spring and place them in the cover. Install the cap and the gasket. Tighten the cap to 35 ft. lbs.
  2.  
  3. Pack the oil pump gear cavity full of petroleum jelly. Do not use gear lube. Reinstall the oil pump gears so that the petroleum jelly is forced into every cavity of the gear pocket, and between the gear teeth. There must be no air spaces. This step is very important. Unless the pump is packed, it may not begin to pump oil as soon as the engine is started.
  4.  
  5. Install the cover assembly using a new gasket and sealer. Tighten the screws to 10 ft. lbs.
  6.  
  7. Install the oil filter.
  8.  

 
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