Isuzu Cars and Trucks 1981-1991

Valve Lifters (Tappet)

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REMOVAL AND INSTALLATION
C223 Diesel Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the engine from the vehicle as outlined in this Section.
  4.  
  5. Remove the rocker arm cover and rocker arm assembly.
  6.  
  7. Label and remove the pushrods.
  8.  
  9. Remove the tappet chamber cover and oil feed pipe.
  10.  
  11. Remove the camshaft oil seal retainer.
  12.  
  13. Remove the timing pulley housing.
  14.  
  15. Remove the camshaft as outlined in this Section.
  16.  
  17. Remove and label the tappets.
  18.  



Click image to see an enlarged view

Fig. Tappet wear indicators C223 diesel engine

To install:

  1. Install the tappets into their original locations.
  2.  
  3. Install the camshaft as outlined in this Section.
  4.  
  5. Install the timing pulley housing.
  6.  
  7. Install the camshaft oil seal retainer.
  8.  
  9. Install the tappet chamber cover and oil feed pipe.
  10.  
  11. Install the pushrods into their original locations.
  12.  
  13. Install the rocker arm assembly and cover.
  14.  
  15. Install the engine into the vehicle as outlined in this Section.
  16.  
  17. Connect the negative (-) battery cable, refill all engine fluids, start the engine and check for leaks.
  18.  

V6 Engine
  1. Disconnect the negative battery cable. Remove the intake manifold and valve cover. Label and remove the rocker arms and remove the push rods.
  2.  
  3. Remove the lifters. If they are coated with varnish, clean with carburetor cleaning solvent.
  4.  



Click image to see an enlarged view

Fig. Valve lifter removal V6 engines

To install:

  1. If installing new lifters or you have disassembled the lifters, they must be primed before installation. Submerge the lifters in SAE 10 oil and carefully push down on the plunger with a 3mm ( 1 / 8 in.) drift. Hold the plunger down (DO NOT pump), then release the plunger slowly. The lifter is now primed.
  2.  
  3. Coat the bottoms of the lifters with Molykoteand#x00AE; (assembly lube) before installation. Install the lifters and pushrods into the engine in their original position.
  4.  
  5. Install the rocker arms and adjust the valves as outlined in .
  6.  

 
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