Chevrolet Chevette/1000 1976-1988 Repair Guide

Crankshaft (Gasoline Engine)

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REMOVAL & INSTALLATION





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Fig. Fig. 1Exploded view of the crankshaft, main bearing caps and bearings



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Fig. Fig. 2A dial gauge may also be used to check crankshaft run-out



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Fig. Fig. 3Mounting a dial gauge to read crankshaft run-out

The crankshaft can be removed with the engine is disassembled for overhaul or without complete disassembly as outlined below.

  1. With the engine removed from the vehicle, remove the following:
  2.  
    1. Drive belts and pulleys
    2.  
    3. Timing belt front upper and lower covers
    4.  
    5. Timing belt and idler pulley
    6.  
    7. Coil
    8.  
    9. Fuel pump and pushrod
    10.  
    11. Distributor
    12.  
    13. Crankcase front cover
    14.  
    15. Oil pan
    16.  
    17. Oil pump and pickup tube
    18.  
    19. Spark plugs
    20.  

  3. Check the connecting rod caps for cylinder number identification. If necessary, mark caps with corresponding cylinder number.
  4.  
  5. Remove the connecting rod caps and push the pistons to the top of the bores.
  6.  
  7. Remove the main bearing caps, rear main oil seal and lift crankshaft out of cylinder block.
  8.  

CLEANING AND INSPECTION



  1. Wash crankshaft in solvent and dry with compressed air.
  2.  
  3. Measure dimensions of main bearing journals and crankpins with a micrometer for out-of-round, taper or undersize (see specifications).
  4.  
  5. Check crankshaft for runout by supporting at the front and rear main bearings journals in V-blocks and check at the front and rear intermediate journals with a dial indicator (see specifications).
  6.  
  7. Replace or recondition the crankshaft if out of specifications.
  8.  

 
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