Dodge Colt/Challenger/Conquest/Vista 1971-1989 Repair Guide

Oil Pump

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LOCATIONS



1410 and 1468cc Engines


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Fig. Fig. 1 Oil pump, front case and oil pan-1410 and 1468cc engines

Use a gear driven oil pump mounted in the front case and driven directly by the crankshaft.

1597cc Engine
1971-77 WITH TIMING CHAIN


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Fig. Fig. 2 Exploded view of the oil pump components-1971-75 1597cc engine

Use a rotor type oil pump located in the timing chaining case and driven by a crankshaft gear.

1978 AND LATER WITH TIMING BELT

Use a rotor type oil pump located on the lower left side of the front case and driven by the timing belt.

1977-80 SILENT SHAFT ENGINES

Use a gear type oil pump located on the front of the left counterbalance shaft and driven by the timing belt.

1994cc Engine
1974-75 STANDARD ENGINE


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Fig. Fig. 3 Component breakdown of the oil pump-1971-75 1994cc engine

Use a rotor type oil pump located under the timing case, inside the oil pan.

1976-80 SILENT SHAFT ENGINE

Use a gear type oil pump located on the front of the right counterbalance shaft and driven by the timing chain.

1997cc Engine

The pump is located in the timing case, on the front of the left silent shaft.

2555cc Engine

Use a gear type oil pump located on the front of the right counterbalance shaft and driven by the timing chain.

REMOVAL & INSTALLATION



Oil Pan Located Pumps
  1. Place No. 1 piston at TDC on the compression stroke (timing marks aligned).
  2.  
  3. Loosen the left and right engine mounts and raise and block the engine off of the mounting brackets.
  4.  
  5. Remove the front splash shields, if necessary. Drain the oil, and remove the engine oil pan.
  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 screen and the oil pump from the engine block.
  2.  
  3. Be sure that No. 1 piston is still on TDC.
  4.  
  5. Remove the distributor cap and make sure that the rotor is pointing to the No. 1 position.
  6.  

This should align the distributor pawl parallel with the crankshaft center line.

To install:

  1. Align the mating marks of the distributor gear and body (if necessary). Insert the oil pump assembly with a new gasket into the engine block until the oil pump shaft gear is in mesh with the crankshaft gear and engaged with the distributor pawl.
  2.  
  3. Using a new gasket, install the oil pan, connect the engine mounts and install the splash shields.
  4.  
  5. Fill the engine with fresh oil, start the engine and check the ignition timing.
  6.  

Timing Case Located Pumps
1410 AND 1468cc ENGINES


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Fig. Fig. 4 Bolt identification on the timing cover-1410 and 1468 engines



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Fig. Fig. 5 Installing the front seal with a special tool-1410 and 1468cc engines



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Fig. Fig. 6 Oil pump gear mating marks



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Fig. Fig. 7 Apply sealer on the oil pan as shown here-1410 and 1468cc engines

  1. Remove the timing belt.
  2.  
  3. Remove the oil pan as previously described.
  4.  
  5. Remove the oil screen.
  6.  
  7. Unbolt and remove the front case assembly.
  8.  
  9. Remove the oil pump cover.
  10.  
  11. Remove the inner and outer gears from the front case.
  12.  

The outer gear has no identifying marks to indicate direction of rotation. Clean the gear and mark it with an indelible marker.

  1. Remove the plug, relief valve spring and relief valve from the case.
  2.  

To install:

  1. Check the front case for damage or cracks. Replace the front seal. Replace the oil screen O-ring. Clean all parts thoroughly with a safe solvent.
  2.  
  3. Check the pump gears for wear or damage. Clean the gears thoroughly and place them in position in the case to check the clearances. There is a crescent-shaped piece between the two gears. This piece is the reference point for two measurements. Use the following clearances for determining gear wear.

    Outer gear outer face-to-case: 0.10-0.20mm
     
    Outer gear teeth-to-crescent: 0.22-0.34mm
     
    Outer gear end-play: 0.04-0.10mm
     
    Inner gear teeth-to-crescent: 0.21-0.32mm
     
    Inner gear end-play: 0.04-0.10mm.
     

  4.  
  5. Check that the relief valve can slide freely in the case.
  6.  
  7. Check the relief valve spring for damage. The relief valve free length should be 47mm. Load/length should be 9.5-13 lbs. at 40mm.
  8.  
  9. Thoroughly coat both oil pump gears with clean engine oil and install them in the correct direction of rotation.
  10.  
  11. Install the pump cover and tighten the bolts to 7-10 ft. lbs.
  12.  
  13. Coat the relief valve and spring with clean engine oil, install them and tighten the plug to 30-36 ft. lbs.
  14.  
  15. Position a new front case gasket, coated with sealer, on the engine and install the front case. Tighten the bolts to 10 ft. lbs. Note that the bolts have different shank lengths. Use the following guide and the accompanying illustration to determine which bolts go where. Bolts marked A: 20mm. B: 30mm. C: 60mm.
  16.  
  17. Coat the lips of a new seal with clean engine oil and slide it along the crankshaft until it touches the front case. Drive it into place with a seal drive.
  18.  
  19. Install the sprocket, timing belt and pulley.
  20.  
  21. Install the oil screen.
  22.  
  23. Thoroughly clean both the oil pan and engine mating surfaces. Apply a 4mm ide bead of RTV sealer in the groove of the oil pan mating surface. A 4mm is usually the first cut mark on the nozzle that comes with the tube of sealer.
  24.  

You have only 15 minutes before the sealer sets.

  1. Tighten the oil pan bolts to 60-72 inch lbs.
  2.  

1597cc ENGINES


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Fig. Fig. 8 Removing the oil pump cover from the 1597cc engine



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Fig. Fig. 9 Install the oil pump cover using a flat block on the 1597cc engine



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Fig. Fig. 10 Apply RTV sealer to the four points indicated by the arrows-1567cc engine



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Fig. Fig. 11 Front case bolt identification-1597cc engine

  1. Remove the timing belt.
  2.  
  3. Drain the oil.
  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 pan and screen.
  2.  
  3. Unbolt and remove the front case assembly.
  4.  

If the front case assembly is difficult to remove from the block, there is a groove around the case into which a prybar may be inserted, to aid in removal. Pry slowly and evenly. Don't hammer!

  1. Remove the oil pressure relief plug, spring and plunger.
  2.  
  3. Remove the nut and pull off the oil pump sprocket.
  4.  
  5. Remove the oil pump cover.
  6.  
  7. Remove the pump rotor.
  8.  

To install:

  1. Check the case for cracks and damage.
  2.  
  3. Check the oil screen for damage.
  4.  
  5. Replace the oil screen O-ring.
  6.  
  7. Thoroughly clean all parts in a safe solvent.
  8.  
  9. Place the rotor back in the case to check clearances:
  10.  



Side clearance: 0.06-0.12mm
 
Tip clearance: 0.04-0.12mm
 
Body clearance: 0.10-0.16mm
 
Shaft-to-cover clearance: 0.02-0.05mm.
 

  1. Check that the relief valve plunger slide smoothly in its bore.
  2.  
  3. Check the relief valve spring. The free length should be 47mm; the load/length should be 9.5 lb @ 40mm.
  4.  
  5. Install a new oil seal, coated with clean engine oil, into the oil pump cover. Drive it into place with a flat block.
  6.  
  7. Install a new cover gasket in the groove in the case.
  8.  
  9. Coat the rotor with clean engine oil and install it in the cover.
  10.  
  11. Install the cover and tighten the bolts.
  12.  
  13. Install the sprocket and tighten the nut to 28 ft. lbs.
  14.  
  15. Coat the oil relief valve plunger with clean engine oil and install it, along with the spring and plug.
  16.  
  17. Install a new case gasket, coated with sealer, on the block and install the case. Tighten the case bolts to 13 ft. lbs.
  18.  

There are two different lengths of case bolts. In the accompanying illustration, the bolts labeled A are 35mm long: the ones marked B are 40mm long.

  1. Install the screen. Tighten the bolts to 18 ft. lbs.
  2.  
  3. Install the oil pan as previously described.
  4.  

1994, 1997, AND 2555cc ENGINES


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Fig. Fig. 12 Exploded view of the engine oil system components-1994 and 2555cc engine



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Fig. Fig. 13 the oil pump mating marks are dots in the gears-1994 and 2555cc engines



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Fig. Fig. 14 To prime the pump, apply 10cc of clean engine oil into the delivery port-1994 and 2555cc engines



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Fig. Fig. 15 On the 1997cc engine, insert an 8mm bar to hold the shaft into position



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Fig. Fig. 16 Separating the oil pump cover on the 1997cc engine



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Fig. Fig. 17 The oil pump mating marks are dots in the gears-1997 engine

  1. Remove the timing chain.
  2.  
  3. Remove the oil pump cover and gears.
  4.  
  5. Remove the relief valve plug, spring and plunger.
  6.  
  7. Thoroughly clean all parts in a safe solvent and check for wear and damage.
  8.  
  9. Clean all orifices and passages.
  10.  
  11. Place the gear back in the pump body and check clearances.

    Gear teeth-to-body: 0.10-0.15mm
     
    Driven gear end-play: 0.06-0.12mm
     
    Drive gear-to-bearing (front end): 0.020-0.045mm
     
    Drive gear-to-bearing (rear end): 0.043-0.066mm
     

  12.  

If gear replacement is necessary, the entire pump body must be replaced.

  1. Check the relief valve spring for wear or damage. Free length should be 47mm; load/length should be 9.5 lb @ 40mm.
  2.  
  3. Assembly the pump components. Make sure that the gears are installed with the mating marks aligned.
  4.  

 
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