ISUZU Amigo/Pick-ups/Rodeo/Trooper 1981-1996

Valve Lifters (Tappets)

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REMOVAL & INSTALLATION



Diesel Engine

See Figure 1



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Fig. Fig. 1: Tappet wear indicators-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.  

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.  

2.2L Gasoline Engine

See Figure 2



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Fig. Fig. 2: Removing the hydraulic roller lifter from a 2.2L gasoline engine

  1. Remove the rocker arm cover.
  2.  
  3. Remove the cylinder head assembly from the engine.
  4.  
  5. Remove the bolts retaining the lifter anti-rotation brackets, then remove the brackets.
  6.  
  7. Remove the hydraulic roller lifters from the bores.
  8.  

To install:

If installing a new lifter, coat the lifter body with a suitable camshaft prelube.

  1. Install each hydraulic lifter to its bore being careful to align the flat sides (top) of the lifters with the flat sides of the anti-rotation brackets. When properly installed the flat sides of each lifter are aligned parallel to the anti-rotation bracket. The roller at the bottom of the lifter is parallel to the camshaft lobe.
  2.  

Make sure to properly align and install each lifter as improper installation of the lifters or brackets could result in engine damage.

  1. Install the anti-rotation bracket retaining bolts and tighten to 97 inch lbs. (11 Nm).
  2.  
  3. Install the cylinder head.
  4.  
  5. Install the rocker arm cover.
  6.  

2.8L and 3.1L Engines

See Figures 3, 4, 5, 6, 7, 8 and 9



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Fig. Fig. 3: Cross-sectional view of a hydraulic lifter



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Fig. Fig. 4: Oversize lifter marking-2.8L engine shown



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Fig. Fig. 5: A magnet is useful in removing lifters from their bores



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Fig. Fig. 6: Stuck lifters must be freed using a slide hammer type lifter removal tool



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Fig. Fig. 7: Loosen the rocker arms and remove