GM Corvette 1984-1996 Repair Guide

Camshaft Covers

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REMOVAL & INSTALLATION



5.7L (VIN J) Engine

See Figure 1

Right Cover
  1. Disconnect the negative battery cable.
  2.  
  3. Drain the engine coolant into a suitable container.
  4.  
  5. Tag and disconnect the spark plug wires from the spark plugs.
  6.  
  7. Detach the electrical connector from the blower motor resistor block.
  8.  
  9. Unfasten the screws securing the evaporator housing quarter panel and panel from the vehicle.
  10.  
  11. Remove the oil pressure sensor from the oil filter housing.
  12.  
  13. Unfasten the bolt retaining the coolant outlet to the injector housing, then position the outlet aside.
  14.  
  15. Remove the upper EGR pipe bolts and pipe.
  16.  
  17. Remove the bolt securing the fresh air pipe bracket to the injector housing.
  18.  
  19. Unfasten the camshaft cover-to-cylinder head, then remove the cover from the head.
  20.  
  21. Thoroughly clean the cylinder head and cover mating surfaces.
  22.  
  23. Inspect the foam inserts for contamination. Remove the inserts and clean or replace them as necessary.
  24.  
  25. Check the secondary chain top guide wear strips.(1.0mm).To check the strips, you must remove the wear strip from the guide located inside the cover at the front. Remove the screws and guide from the camshaft cover. No wear groove should exceed a depth of 0.040 in. After checking, install the guide and screws. Apply Loctite® 262 to the screws and tighten to 53 inch lbs. (6 Nm). Install the wear strip onto the guide.
  26.  



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Fig. Fig. 1: It is essential to tighten the camshaft cover bolts in the proper sequence-5.7L (VIN J) engine

To install:
  1. Apply Permabond® A136 or equivalent to the camshaft cover. Apply Loctite® 565 to the end plugs. Make sure the camshaft end plugs and new spark plug bore O-rings are in place before installing the cover.
  2.  
  3. Install the camshaft cover and bolts. To be sure the camshaft operates properly, the cover retainers MUST be tightened to the following specifications, in the sequence shown in the accompanying figure:
    1. Tighten the 24 M8 bolts to 15 ft. lbs. (20 Nm), 3 times.
    2.  
    3. Tighten the 3 M6 screws to 89 inch lbs. (10 Nm).
    4.  

  4.  
  5. Install a new coolant outlet cover gasket, cover and retaining screws. Tighten the screws to 89 inch lbs. (10 Nm).
  6.  
  7. Install the bolt holding the fresh air pipe bracket to the injector housing and tighten the bolt to 19 ft. lbs. (26 Nm).
  8.  
  9. Install the upper EGR pipe and secure with the retaining bolts. Tighten the bolts to 89 inch lbs. (10 Nm).
  10.  
  11. Install the evaporative housing quarter panel and screws.
  12.  
  13. Attach the electrical connector to the blower motor resistor block.
  14.  
  15. Connect the spark plug wires to the spark plugs, as tagged during removal.
  16.  
  17. Refill the cooling system, then connect the negative battery cable.
  18.  

left cover
  1. Take the vehicle to a reputable repair shop to have the A/C system discharged using the proper equipment.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the power steering pump, as outlined in Suspension & Steering of this repair guide.
  6.  
  7. Unfasten the bolts securing the A/C suction/discharge hoses to the compressor. Plug or cover the openings to prevent contamination from entering the system.
  8.  
  9. Tag and disconnect the spark plugs wires from the plugs.
  10.  
  11. Detach the ventilation breather pipe from the camshaft cover.
  12.  
  13. Remove the screws holding the control cable hold-down clamp screws to the plenum.
  14.  
  15. Remove the throttle body extension and the coolant outlet pipe.
  16.  
  17. Remove the brake power booster.
  18.  
  19. Unfasten the camshaft cover-to-cylinder head, then remove the cover from the head.
  20.  
  21. Thoroughly clean the cylinder head and cover mating surfaces.
  22.  
  23. Inspect the foam inserts for contamination. Remove the inserts and clean or replace them as necessary.
  24.  
  25. Check the secondary chain top guide wear strips.(1.0mm).To check the strips, you must remove the wear strip from the guide located inside the cover at the front. Remove the screws and guide from the camshaft cover. No wear groove should exceed a depth of 0.040 in. After checking, install the guide and screws. Apply Loctite® 262 to the screws and tighten to 53 inch lbs. (6 Nm). Install the wear strip onto the guide.
  26.  

To install:
  1. Apply Permabond® A136 or equivalent to the camshaft cover. Apply Loctite® 565 to the end plugs. Make sure the camshaft end plugs and new spark plug bore O-rings are in place before installing the cover.
  2.  
  3. Install the camshaft cover and bolts. To be sure the camshaft operates properly, the cover retainers MUST be tightened to the following specifications, in the sequence shown in the accompanying figure:
    1. Tighten the 24 M8 bolts to 15 ft. lbs. (20 Nm), 3 times.
    2.  
    3. Tighten the 3 M6 screws to 89 inch lbs. (10 Nm).
    4.  

  4.  
  5. Install the brake power booster.
  6.  
  7. Install the screws holding the cable hold-down clamps onto the plenum and tighten them to 18 inch lbs. (2 Nm).
  8.  
  9. Connect the ventilation breather pipe to the camshaft cover.
  10.  
  11. Attach the spark plug wires to the plugs, as tagged during removal.
  12.  
  13. Unplug the openings, then install the bolts retaining the A/C suction/discharge hoses to the A/C compressor.
  14.  
  15. Install the throttle body extension.
  16.  
  17. Install the coolant outlet pipe. Tighten the throttle body screws to 53 inch lbs. (6 Nm) and the outlet pipe screws to 89 inch lbs. (10 Nm). Tighten the bolt to 24 ft. lbs. (33 Nm).
  18.  
  19. Install the power steering pump and tighten the mounting bolts to 24 ft. lbs. (33 Nm).
  20.  
  21. Connect the negative battery cable. Take your vehicle to a reputable repair shop to have the A/C system charged.
  22.  

 
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