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

Oil Pump

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REMOVAL & INSTALLATION



1.8L and 2.0L Engines

See Figures 1, 2 and 3



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Fig. Fig. 1: Aligning the oil pump drive and driven rotors-1.8L and 2.0L engines



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Fig. Fig. 2: Install the oil pump-1.8L and 2.0L engines



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Fig. Fig. 3: Aligning the oil pump drive shaft-1.8L and 2.0L engines

The oil pump is located in the oil pan and is attached to the front cover.

  1. Disconnect the negative battery cable. Raise and safely support the vehicle.
  2.  
  3. Rotate the crankshaft to position the No. 1 or No. 4 cylinder at the TDC of its compression stroke.
  4.  
  5. Drain the crankcase and remove the oil pan as outlined in this section.
  6.  


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 your 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. Remove the oil pick-up-to-engine bolt and the oil pick-up tube from the oil pump.
  2.  
  3. Remove the oil pump-to-front cover bolts and the oil pump.
  4.  

To install:
  1. Turn the punch mark on the oil pump drive gear toward the oil filter and align the center of the oil pump's drive gear with the mark on the oil pump case.
  2.  
  3. Insert the oil pump into the front cover.
  4.  

When installing the oil pump, turn the oil pump shaft so the drive gear engages with the drive pinion. When installed, the punch mark on the drive gear should be facing the main bearings and the shaft tang must be engaged with the distributor shaft.

  1. Install the oil pump and pump-to-front cover bolts.
  2.  
  3. Remove the oil pick-up-to-engine bolt and the oil pick-up tube from the oil pump.
  4.  
  5. Install the oil pan as outlined in this section.
  6.  
  7. Connect the negative battery cable. Lower the vehicle.
  8.  
  9. Refill the crankcase. Connect the negative battery cable.
  10.  
  11. Start the engine and check for leaks.
  12.  

Diesel Engine

See Figures 4 and 5



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Fig. Fig. 4: Oil pump assembly-diesel engine



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Fig. Fig. 5: Oil pump assembly-2.2L turbo diesel engine

  1. Disconnect the negative battery cable and drain the engine oil.
  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 your 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. Remove the engine from the vehicle as outlined in this section.
  2.  
  3. Remove the oil pan as outlined in this section.
  4.  
  5. Remove the oil pipe from the oil pump. Remove the oil pump-to-engine bolts and the oil pump.
  6.  

To install:
  1. Clean the gasket mounting surfaces.
  2.  
  3. Using a new gasket, install the oil pump and connect the oil pipe to the oil pump. Install and torque the oil pan-to-engine bolts to 10-17 ft. lbs. (14-22 Nm).
  4.  
  5. Install the oil pan.
  6.  
  7. Install the engine into the vehicle.
  8.  
  9. Connect the negative battery cable, refill the engine oil, start the engine and check for leaks.
  10.  

2.2L Gasoline Engine

See Figure 6



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Fig. Fig. 6: Exploded view of a common oil pump mounting-2.2L gasoline engine

  1. Remove the oil pan.
  2.  
  3. Remove the oil pump attaching bolt and, if equipped, the pickup tube nut/bolt then remove the pump along with the pickup tube and shaft, as necessary.
  4.  
  5. It may be necessary to remove the extension shaft and retainer (being careful not the crack the retainer) from the pump.
  6.  

To install:
  1. If the extension shaft was removed, heat the extension shaft retainer in hot water, then install the shaft and retainer to the oil pump. Make sure the retainer does not crack during installation.
  2.  
  3. Ensure that the pump pickup tube is tight in the pump body. If the tube should come loose, oil pressure will be lost and oil starvation will occur. If the pickup tube is loose it should be replaced.
  4.  
  5. Install the pump aligning the pump shaft with the distributor drive gear as necessary. Tighten oil pump/pickup tube retainer(s) to 32 ft. lbs. (44 Nm).
  6.  
  7. Install the oil pan and refill the engine crankcase. Start the engine and make sure oil pressure builds immediately or engine damage could occur.
  8.  

2.3L and 2.6L Engines

See Figures 7 and 8



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Fig. Fig. 7: Oil pump assembly-2.3L and 2.6L engines



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Fig. Fig. 8: Oil pump assembly removal sequence-2.3L and 2.6L engines

  1. Disconnect the negative battery cable.
  2.  
  3. Drain the engine oil.
  4.  
  5. Loosen and remove the engine accessory drive belts.
  6.  
  7. Unbolt and remove the cooling fan assembly.
  8.  
  9. If equipped with A/C, remove the belt tensioner.
  10.  
  11. Remove the water pump pulley.
  12.  
  13. Remove the power steering pump from its mount. Don't disconnect the hydraulic lines.
  14.  
  15. Disconnect and remove the starter motor if a flywheel holding tool is to be used.
  16.  
  17. Remove the upper timing belt cover.
  18.  
  19. Rotate the crankshaft to set the engine at TDC/compression for the No. 1 cylinder. The mark on the camshaft sprocket will align with the mark on the rear timing cover.
  20.  
  21. Remove the crankshaft pulley.
  22.  
  23. Remove the lower timing belt cover. Verify that the engine is set at TDC/compression for the No. 1 cylinder; the pointer on the crankshaft sprocket aligns with the pointer on the oil seal retainer.
  24.  
  25. Loosen the timing belt tensioner and relax the tension and remove the timing belt from the crankshaft sprocket.
  26.  
  27. Use tool No. J-22888 or an equivalent puller to remove the oil pump sprocket.
  28.  
  29. Unbolt the oil pump and remove it from the engine.
  30.  
  31. Remove the O-ring seal from the oil pump housing.
  32.  

To install:

WARNING
The timing belt must be replaced if it is damaged, or has come in contact with oil or coolant.

  1. Inspect the oil pump and its rotors for signs of scoring and damage. Replace the pump or any damaged parts.
  2.  
  3. Lubricate and install a new O-ring seal.
  4.  
  5. Install the oil pump and tighten the bolts to 14 ft. lbs. (19 Nm).
  6.  
  7. Align the timing marks and install the oil pump sprocket. Apply a small amount of thread locking compound to the nut threads and tighten it to 56 ft. lbs. (76 Nm).
  8.  
  9. Verify that the engine is at TDC/compression for the No. 1 cylinder.
  10.  
  11. Install the timing belt.
  12.  
  13. If a flywheel holder tool was used, remove it.
  14.  
  15. Apply the tensioner pulley spring pressure to the timing belt.
  16.  

Remove the crankshaft holder before rotating the crankshaft to tension the timing belt.

  1. Rotate the crankshaft counterclockwise for two complete revolutions and realign the timing marks.
  2.  
  3. Loosen the tensioner pulley bolt to allow the spring to adjust the correct tension. Torque the tensioner pulley bolt to 14 ft. lbs. (19 Nm).
  4.  
  5. Install the lower timing cover and tighten the bolts to 4.4 ft. lbs. (6 Nm).
  6.  
  7. Install the crankshaft pulley and tighten the bolt to 87 ft. lbs. (118 Nm).
  8.  
  9. Install the upper timing cover.
  10.  
  11. Install the starter motor and tighten the mounting bolts to 30 ft. lbs. (40 Nm).
  12.  
  13. Install the power steering pump. If the hydraulic lines were disconnected, refill and bleed the power steering system.
  14.  
  15. Install the cooling fan and tighten the bolts to 20 ft. lbs. (26 Nm).
  16.  
  17. Install and adjust the accessory drive belts.
  18.  
  19. Refill the engine with fresh oil.
  20.  
  21. Reconnect the negative battery cable.
  22.  
  23. Start the engine and check for leaks.
  24.  
  25. Check the engine's oil pressure.
  26.  

2.8L Engine

See Figure 9



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Fig. Fig. 9: Exploded view of the oil pump assembly mounting-2.8L engine

The oil pump is attached to the cylinder block and is located in the oil pan.

  1. Disconnect the negative battery cable. Raise and safely support the vehicle.
  2.  
  3. Drain the crankcase. Remove the oil pan as outlined in this section.
  4.  


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 your 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. Remove the oil pump-to-engine bolts and the oil pump.
  2.  

To install:
  1. Align the oil pump shaft with the hexagon socket and install the pump. Torque the oil pump-to-engine bolts to 30 ft. lbs. (41 Nm).
  2.  
  3. Install the oil pan.
  4.  
  5. Connect the negative battery cable. Start the engine and check for leaks.
  6.  

3.1L Engine

See Figure 10



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Fig. Fig. 10: Exploded view of the oil pump assembly mounting-3.1L engine

The oil pump is attached to the cylinder block and is located under the oil pan.

  1. Disconnect the negative battery cable. Raise and safely support the vehicle.
  2.  
  3. Drain the crankcase and remove the oil pan.
  4.  
  5. Remove the oil pump-to-engine bolts and the oil pump.
  6.  

To install:
  1. Align the oil pump shaft with the hexagon socket and install the pump. Torque the oil pump-to-engine bolts to 30 ft. lbs. (41 Nm).
  2.  
  3. Install the oil pan.
  4.  
  5. Refill the crankcase with oil.
  6.  
  7. Connect the negative battery cable. Start the engine and check for leaks.
  8.  

3.2L Engine

See Figures 11 and 12



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Fig. Fig. 11: Oil pump and related components-3.2L engine



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Fig. Fig. 12: Oil pump sealant application points

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the timing belt. If the timing belt is damaged or has been contaminated with oil or coolant, it must be replaced.
  4.  
  5. Remove the crankshaft timing pulley.
  6.  
  7. Raise and safely support the vehicle.
  8.  
  9. Drain the engine oil.
  10.  
  11. Remove the oil pan.
  12.  
  13. Remove the oil pipe and O-ring.
  14.  
  15. Remove the oil strainer and O-ring.
  16.  
  17. Remove the oil cooler assembly.
  18.  
  19. Remove the oil pump mounting bolts, and then remove the oil pump from the engine block.
  20.  

To install:
  1. Install a new oil seal into the oil pump housing.
  2.  
  3. Thoroughly clean the sealing surface of the oil pump and the engine block.
  4.  
  5. Apply sealant to the oil pump. Be careful not to block the oil ports.
  6.  
  7. Apply engine oil to the seal lip and install the oil pump on the engine block. Tighten the mounting bolts to 13 ft. lbs. (18 Nm). Take care not to drop the garter spring from the seal lid during installation.
  8.  
  9. Install the oil cooler assembly.
  10.  
  11. Install the oil pipe and O-ring.
  12.  
  13. Install the oil strainer and O-ring.
  14.  
  15. Install the oil pan.
  16.  
  17. Install the crankshaft timing pulley.
  18.  
  19. Install the timing belt.
  20.  
  21. Install the remaining accessories and drive belts.
  22.  
  23. Lower the vehicle.
  24.  
  25. Refill the engine with oil.
  26.  
  27. Connect the negative battery cable, start the engine and check for proper oil pressure.
  28.  

If the oil pressure does not build up almost immediately, stop the engine and investigate the cause.

  1. Check for oil leaks.
  2.  

INSPECTION



1.8L and 2.0L Engines
  1. Visually inspect the oil pump for wear, damage or other abnormal conditions.
  2.  
  3. Remove the oil pump cover from the bottom of the oil pump.
  4.  
  5. Using a feeler gauge, measure the clearance between the pump body and the vane; it should be 0.0063-0.0086 in. (0.16-0.22mm); if not, replace the entire pump assembly.
  6.  
  7. Using a feeler gauge, measure the clearance between the rotor and the vane; it should be 0.0051-0.0059 in. (0.13-0.15mm); if not, replace the rotor set: pin, shaft, rotor and vane.
  8.  
  9. Place a straightedge across the bottom of the oil pump and a feeler gauge between the straightedge and the rotor; the clearance between the rotor/vane-to-cover should be 0.0011-0.0035 in. (0.03-0.09mm); if not, replace the rotor set: pin, shaft, rotor and vane.
  10.  
  11. Using a feeler gauge, measure the clearance between the pump body and the rotor shaft; it should be less than 0.0079 in. (0.2mm), if not, replace the entire pump assembly.
  12.  

2.3L and 2.6L Engines
  1. Visually inspect the oil pump for wear, damage or other abnormal conditions.
  2.  
  3. Insert the oil pump vane into the cylinder block.
  4.  
  5. Place a straightedge across the oil pump opening and a feeler gauge between the straightedge and the vane; the clearance between the vane-to-cylinder block surface should be 0.002-0.004 in. (0.05-0.10mm); if not, replace the vane.
  6.  
  7. Using a feeler gauge, measure the side clearance between the cylinder block and the vane; it should be 0.009-0.014 in. (0.23-0.36mm); if not, replace the vane.
  8.  
  9. Position the vane onto the rotor shaft.
  10.  
  11. Using a feeler gauge, measure the clearance between the rotor and the vane; it should be 0.005-0.006 in. (0.13-0.15mm); if not, replace the rotor and/or vane.
  12.  

Diesel Engine
  1. Visually inspect the oil pump for wear, damage or other abnormal conditions.
  2.  
  3. Remove the oil pump cover from the bottom of the oil pump.
  4.  
  5. Place a straightedge across the bottom of the oil pump and a feeler gauge between the straightedge and the rotor; the clearance between the rotor/vane-to-cover should be 0.0008-0.0028 in. (0.02-0.07mm); if not, replace the rotor set: pin, shaft, rotor and vane.
  6.  
  7. Using a feeler gauge, measure the clearance between the rotor and the vane; it should be less than 0.0055 in. (0.14mm); if not, replace the rotor set: pin, shaft, rotor and vane.
  8.  
  9. Using a feeler gauge, measure the clearance between the pump body and the vane; it should be 0.0079-0.0106 in. (0.20-0.27mm); if not, replace the entire pump assembly.
  10.  
  11. Using a feeler gauge, measure the clearance between the pump body and the rotor shaft; it should be less than 0.0079 in. (0.2mm); if not, replace the entire pump assembly.
  12.  

When necessary to replace the pinion and shaft, install the shaft in the pump body and set the pinion on the shaft. Drill a hole through the pinion and shaft using a 5mm drill, then install and stake the pin.

2.8L and 3.1L Engines

See Figures 13, 14, 15 and 16



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Fig. Fig. 13: Measure gear to body clearance-3.1L shown



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Fig. Fig. 14: Measure side clearance-3.1L shown



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Fig. Fig. 15: Measure gear lash-3.1L shown



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Fig. Fig. 16: Oil pump assembly-3.1L shown

  1. Visually inspect the oil pump for wear, damage or other abnormal conditions.
  2.  
  3. Remove the oil pump cover from the bottom of the oil pump.
  4.  
  5. Place a straightedge across the bottom of the oil pump and a feeler gauge between the straightedge and the rotor; the clearance between the rotor/vane-to-cover should be 0.002-0.005 in. (0.05-0.13mm); if not, replace the rotor set: pin, shaft, rotor and vane.
  6.  
  7. Using a feeler gauge, measure the gear lash clearance between the rotor and the vane; it should be 0.003-0.004 in. (0.08-0.10mm).
  8.  
  9. Using a feeler gauge, measure the clearance between the pump body and the vane; it should be 0.009-0.105 in. (0.23-0.30mm); if not, replace the entire pump assembly.
  10.  
  11. If any specification is questionable the entire pump should be replaced. An oil pump failure or low oil pressure can destroy the entire engine in minutes at highway speed.
  12.  

3.2L Engine

See Figures 17, 18, 19 and 20



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Fig. Fig. 17: Oil pump assembly-3.2L engine



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Fig. Fig. 18: Measure the distance between the drive gear and driven gear-3.2L oil pump



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Fig. Fig. 19: Measure the clearance between the body and driven gear-3.2L oil pump



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Fig. Fig. 20: Measure the side edge clearance with a feeler gauge and straightedge-3.2L oil pump

  1. Visually inspect the oil pump for wear, damage or other abnormal conditions.
  2.  
  3. Remove the oil pump.
  4.  
  5. Remove the oil pump cover from the back of the oil pump.
  6.  
  7. Using a feeler gauge, measure the clearance between the pump body and the driven gear; it should be 0.0039-0.0070 in. (0.10-0.18mm).
  8.  
  9. Using a feeler gauge, measure the gear lash clearance drive and driven gears it should be 0.0043-0.010 in. (0.11-0.26mm).
  10.  
  11. Place a straightedge across the bottom of the oil pump and a feeler gauge between the straightedge and the gears; the clearance should be 0.0011-0.0059 in. (0.03-0.09mm).
  12.  
  13. Replace any questionable components. Tighten the cover bolts to 87 inch lbs. (10 Nm).
  14.  

 
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