GM Caprice 1990-1993 Repair Guide

Timing Chain Cover and Seal

Print

REMOVAL AND INSTALLATION



EXCEPT 5.0L (VIN Y) ENGINE

See Figures 1 and 2



Click image to see an enlarged view

Fig. Fig. 1: Timing chain, cover and gear assembly - Except 5.0L (VIN Y) engine



Click image to see an enlarged view

Fig. Fig. 2: Apply sealer to these joints prior to assembly - Except 5.0L (VIN Y) engine

  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a suitable container and remove the water pump assembly.
  4.  
  5. Using tool J-23523-E or equivalent, remove the torsional damper assembly.
  6.  
  7. Raise and safely support the vehicle. Remove the oil pan assembly.
  8.  
  9. Remove the engine front cover retaining bolts. Remove the front cover and discard the gasket.
  10.  

To install:
  1. Clean the gasket mating surfaces.
  2.  
  3. Coat new engine front cover gasket with sealant and place into position on the engine front cover.
  4.  
  5. Position cover and gasket in place and loosely install the engine front cover to block upper attaching bolts. Tighten bolts alternately while carefully pressing downward on the engine front cover so the dowels in the block are aligned with the corresponding holes in the engine front cover. Be careful not to force the the front cover over the dowels to the point where the cover flange or dowels become distorted.
  6.  
  7. Install the remaining cover bolts and tighten all cover bolts alternately and evenly to 97 inch lbs. (11 Nm).
  8.  
  9. Install the oil pan.
  10.  
  11. Install the torsional damper.
  12.  
  13. Install the coolant pump, hoses and belts.
  14.  
  15. Connect the negative battery cable and add engine coolant.
  16.  

5.0L (VIN Y) ENGINE

See Figures 3, 4 and 5



Click image to see an enlarged view

Fig. Fig. 3: Timing chain, cover and gear assembly - 5.0L (VIN Y) engine



Click image to see an enlarged view

Fig. Fig. 4: Timing cover installation - 5.0L (VIN Y) engine



Click image to see an enlarged view

Fig. Fig. 5: Trimming the pan seal - 5.0L (VIN Y) engine

  1. Disconnect the negative battery cable and drain the coolant.
  2.  
  3. Disconnect the radiator hose, heater hose and the bypass hose. Remove the fan, belts and pulley.
  4.  
  5. Disconnect the power steering pump bracket and, if equipped, the air conditioner compressor bracket. Position accessories and brackets aside.
  6.  
  7. Remove the torsional damper and crankshaft pulley.
  8.  
  9. Remove the front cover attaching bolts/studs and remove the cover and water pump assembly from the front of the engine.
  10.  
  11. Remove the dowel pins. If necessary grind a flat surface on the dowel pins to aid in removal.
  12.  

To install:
  1. Clean gasket mating surfaces.
  2.  
  3. Apply 1050026 or equivalent sealer around the coolant holes of the new cover gasket. Trim about 1 / 8 inch from each end of the new front pan seal and trim any excess material from the front edge of the oil pan gasket.
  4.  
  5. Position gasket on block and seal on front cover. Apply 1052915 or equivalent RTV sealer on the oil pan, on the seal mating surface.
  6.  
  7. Position front cover in place on the block, pressing to compress the oil pan seal. Guide the seal into place between the oil pan and cylinder block with a suitable small tool.
  8.  
  9. Apply engine oil to bolts/studs and insert 2 bolts, finger tight.
  10.  
  11. Install the dowel pins, chamfer ends first, through the holes in the cover.
  12.  
  13. Install the remaining front cover attaching bolts/studs, tighten alternately and evenly to 22 ft. lbs. (28 Nm).
  14.  
  15. Install the torsional damper and pulley
  16.  
  17. Connect the power steering pump bracket and, if equipped, the air conditioner compressor bracket.
  18.  
  19. Install the fan, belts and pulley. Connect the radiator hose, heater hose and the bypass hose.
  20.  
  21. Connect the negative battery cable and add engine coolant.
  22.  

TIMING CHAIN COVER OIL SEAL REPLACEMENT



EXCEPT 5.0L (VIN Y) ENGINE

See Figures 6 and 7



Click image to see an enlarged view

Fig. Fig. 6: Installing oil seal with front cover on engine - Except 5.0L (VIN Y) engine



Click image to see an enlarged view

Fig. Fig. 7: Installing oil seal with front cover removed from engine - Except 5.0L (VIN Y) engine

  1. Disconnect the negative battery cable.
  2.  
  3. With the torsional damper removed, remove the old seal using a suitable prying tool. Take care not to damage the front cover when removing seal.
  4.  

To install:
  1. Position new seal with the open end toward the inside of the engine front cover and carefully drive in the new seal with tool J-35468 or equivalent.
  2.  
  3. Reinstall torsional damper, connect the negative battery cable and check cover for oil leaks.
  4.  

5.0L (VIN Y) ENGINE

See Figure 8



Click image to see an enlarged view

Fig. Fig. 8: Removing oil seal with front cover on engine - 5.0L (VIN Y) engine

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the crankshaft pulley and torsional balancer.
  4.  
  5. Remove the oil seal using tool BT-6406 or J-23129 and J-1859-03 or their equivalents.
  6.  

To install:
  1. Coat the outside diameter of the new seal with sealer.
  2.  
  3. Install seal with lip facing the engine, using tool BT-6405, J-25264-A or equivalent and tighten until 0.005 inch gauge fits between front cover and tool.
  4.  
  5. Install crankshaft pulley and balancer.
  6.  
  7. Install the belts and adjust tension.
  8.  
  9. Reconnect the negative battery cable. Inspect cover for oil leaks.
  10.  

 
label.common.footer.alt.autozoneLogo