Toyota Pick-ups/Land Cruiser/4Runner 1989-1996

Engine Oil Cooler

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REMOVAL & INSTALLATION



3VZ-E Engine

See Figures 1 and 2

  1. Drain the engine coolant.
  2.  
  3. Disconnect the oil cooler hoses.
  4.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the oil cooler assembly found on 3VZ-E engines

  1. On the 2WD vehicles, remove the 2 bolts, union bolt, relief valve, gaskets and oil cooler.
  2.  
  3. On 4WD vehicles, remove the center bolt, relief valve, gaskets and oil cooler.
  4.  
  5. Inspect the oil cooler for damage or clogging. If needed replace.
  6.  



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Fig. Fig. 2: Cross-sectional view of the oil cooler

To install:
  1. Replace the O-rings when installing the oil cooler.
  2.  
  3. On the 2WD vehicles, install the cooler with the relief valve, union bolt and 3 new gaskets. Tighten down to 43 ft. lbs. (59 Nm). Install the other 2 bolts and tighten to 29 ft. lbs. (39 Nm).
  4.  
  5. On the 4WD vehicles, install the oil cooler with the relief valve and 2 new gaskets. Tighten to 43 ft. lbs. (59 Nm). Tighten the other 2 bolts to 29 ft. lbs. (39 Nm).
  6.  
  7. Connect the oil cooler hoses.
  8.  
  9. Fill the engine with a mixture of water and coolant. Start the engine, top off the fluid and check for leaks.
  10.  
  11. Recheck the engine oil level.
  12.  

5VZ-FE Engine

See Figures 3, 4 and 5

  1. Drain the engine cooling system.
  2.  
  3. Disconnect the oil cooler hoses.
  4.  



Click image to see an enlarged view

Fig. Fig. 3: Exploded view of the oil cooler assembly found on 5VZ-FE engines

  1. Remove the bolt, relief valve, gaskets and oil cooler.
  2.  



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Fig. Fig. 4: Disconnect the hoses indicated

To install:
  1. Replace the O-ring on the oil cooler.
  2.  
  3. Use new gaskets for the relief valve.
  4.  
  5. Mount the cooler assembly and tighten to 43 ft. lbs. (59 Nm).
  6.  



Click image to see an enlarged view

Fig. Fig. 5: Be sure the unit is properly positioned before tightening the union bolt

  1. Attach the cooler hoses.
  2.  
  3. Fill the engine with a mixture of water and coolant. Start the engine, top off the fluid and check for leaks.
  4.  
  5. Recheck the engine oil level.
  6.  

3F-E Engine

See Figures 6 and 7

  1. Drain the cooling system.
  2.  
  3. Remove the air cleaner hose.
  4.  



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Fig. Fig. 6: Exploded view of the oil cooler unit found on the 3F-E engine

  1. Drain the engine oil and remove the filter.
  2.  


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize you exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Disconnect the oil cooler hoses.
  2.  
  3. Remove the two union bolts, gaskets, oil cooler and O-rings from the engine.
  4.  



Click image to see an enlarged view

Fig. Fig. 7: Remove the two union bolts securing the oil cooler

  1. Check the oil cooler for damages or clogging.
  2.  

To install:
  1. Install the oil cooler by placing the O-rings in position on the cooler. Install the cooler with two new gaskets and the union bolts. Tighten the union bolts to 47 ft. lbs. (64 Nm).
  2.  
  3. Attach the oil cooler hoses.
  4.  
  5. Attach the air cleaner hose.
  6.  
  7. Fill the crankcase with new engine oil.
  8.  
  9. Fill the cooling system.
  10.  
  11. Start the engine, top off the coolant level. Check the engine oil level.
  12.  
  13. Check for leaks.
  14.  

1FZ-FE Engine

See Figures 8, 9, 10, 11, 12, 13 and 14



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Fig. Fig. 8: Exploded view of the oil cooler and mounting

  1. Drain the engine cooling system.
  2.  
  3. Remove the air cleaner lid.
  4.  
  5. Disconnect the heated oxygen sensor wiring.
  6.  



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Fig. Fig. 9: Remove the bolts securing the insulator ...



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Fig. Fig. 10: ... and the exhaust manifold

  1. Remove the nuts and bolts holding the front header pipe to the catalyst.
  2.  
  3. Unbolt the front pipe and remove the gasket.
  4.  
  5. Loosen the clamp bolt, then disconnect the clamp from the support bracket.
  6.  
  7. Remove the bolts and the support bracket.
  8.  
  9. Remove the nuts, exhaust pipe and gaskets.
  10.  
  11. Remove the bolts and the heat insulator.
  12.  



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Fig. Fig. 11: Use an extension to reach the oil cooler mounting bolts



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Fig. Fig. 12: The cover can be separated from the oil cooler

  1. Loosen the nuts for the exhaust manifold, then remove it and the gasket.
  2.  
  3. Unscrew the oil pressure switch.
  4.  
  5. Unbolt the oil cooler and cover assembly, discard of the gasket.
  6.  



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Fig. Fig. 13: If necessary, remove the oil pressure relief valve from the cooler assembly



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Fig. Fig. 14: Check that the relief valve falls smoothly into the hole under its own weight

  1. Remove the nuts, oil cooler and gaskets from the oil cooler cover.
  2.  
  3. Remove the plug, gasket, spring and relief valve from the unit.
  4.  
  5. Coat the relief valve with engine oil and check that it falls smoothly into the valve hole by its own weight. If not replace the valve.
  6.  

To install:
  1. Install the relief valve, spring, and new gasket along with the plug. Tighten the plug to 27 ft. lbs. (37 Nm).
  2.  
  3. Assemble the oil cooler and cover with 2 new gaskets. Attach the cover with the 4 nuts. Tighten to 12 ft. lbs. (17 Nm).
  4.  
  5. Install a new gasket, oil cooler and cooler cover assembly with the 10 bolts and 2 nuts, tighten them to 15 ft. lbs. (21 Nm).
  6.  
  7. Apply Loctite® or equivalent to the first 2-3 threads of the oil pressure sending unit, then install the unit into the engine.
  8.  
  9. Using a new gasket, attach the exhaust manifold to the engine, tighten to 29 ft. lbs. (39 Nm).
  10.  
  11. Install the heat insulator, tighten to 14 ft. lbs. (19 Nm).
  12.  
  13. To install the front header pipe, apply 2 new gaskets to the front of the pipe attach, then tighten to 46 ft. lbs. (63 Nm).
  14.  
  15. Install the support bracket, tighten to 17 ft. lbs. (24 Nm).
  16.  
  17. Connect the clamp and tighten the clamp bolt to 14 ft. lbs. (20 Nm).
  18.  
  19. Attach the front header pipe to the catalyst using new gaskets. Tighten to 34 ft. lbs. (46 Nm).
  20.  
  21. Install the air cleaner lid and hose.
  22.  
  23. Fill the radiator with a water coolant mixture, start the engine and top off the levels.
  24.  
  25. Check for leaks and check the engine oil.
  26.  

 
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