Jeep Wagoneer/Commando/Cherokee 1984-1998

Distributor

Print

REMOVAL



  1. Remove the high-tension wires from the distributor cap terminal towers, noting their positions to assure correct reassembly.
  2.  
  3. Remove the primary lead from the terminal post at the side of the distributor.
  4.  
  5. Disconnect the vacuum line if equipped.
  6.  
  7. Remove the distributor cap retaining hooks or screws and remove the distributor cap.
  8.  
  9. Note the position of the rotor in relation to the base. Scribe a mark on the base of the distributor and on the engine to facilitate reinstallation. Align the marks with the direction the metal tip of the rotor is pointing.
  10.  
  11. Remove the bolt that hold the distributor to the engine.
  12.  
  13. Lift the distributor assembly from the engine.
  14.  

INSTALLATION



2.8L Engine
ENGINE NOT ROTATED
  1. Insert the distributor shaft and assembly into the engine. Line up the mark on the distributor and the one on the engine with the metal tip of the rotor. Make sure that the vacuum advance diaphragm is pointed in the same direction as it was pointed originally. This will be done automatically if the marks on the engine and the distributor are line up with the rotor.
  2.  
  3. Install the distributor hold-down bolt and clamp. Leave the screw loose enough so that you can move the distributor with heavy hand pressure.
  4.  
  5. Connect the primary wire to the distributor side of the coil. Install the distributor cap on the distributor housing. Secure the distributor cap with the spring clips or the screw type retainers, whichever is used.
  6.  
  7. Install the spark plug wires. Make sure that the wires are pressed all of the way into the top of the distributor cap and firmly onto the spark plugs.
  8.  

Design of the V6 engine requires a special form of distributor cam. The distributor may be serviced in the regular way and should cause no more problems than any other distributor, if the firing plan is thoroughly understood. The distributor cam is not ground to standard 6-cylinder indexing intervals. This particular form requires that the original pattern of spark plug wiring be used. The engine will not run in balance if No. 1 spark plug wire is inserted into No. 6 distributor cap tower, even though each wire in the firing sequence is advanced to the next distributor tower. There is a difference between the firing intervals of each succeeding cylinder through the 720° engine cycle.

  1. Set the ignition timing.
  2.  

ENGINE ROTATED

If the engine has been turned while the distributor has been removed, or if the marks were not drawn, it will be necessary to initially time the engine.

  1. If the engine has been rotated while the distributor was out, you'll have to first put the engine at Top Dead Center firing position on No. 1 cylinder. You can either remove the valve cover or No. 1 spark plug to determine engine position. Rotate the engine with a socket wrench on the nut at the center of the front pulley in the normal direction of rotation. Either feel for air being expelled forcefully through the spark plug hole or watch for the engine to rotate up to the Top Center mark without the valves moving (both valves will be closed). If the valves are moving as you approach TDC or there is no air being expelled through the plug hole, turn the engine another full turn until you get the appropriate indication as the engine approaches TDC position.
  2.  
  3. Start the distributor into the engine with the matchmarks between the distributor body and the engine lined up. Turn the rotor slightly until the matchmarks on the bottom of the distributor body and the bottom of the distributor shaft near the gear are aligned. Then, insert the distributor all the way into the engine. If you have trouble getting the distributor and camshaft gears to mesh, turn the rotor back and forth very slightly until the distributor can be inserted easily. If the rotor is not now lined up with the position of No. 1 plug terminal, you'll have to pull the distributor back out slightly, shift the position of the rotor appropriately, and then reinstall it.
  4.  
  5. Align the matchmarks between the distributor and engine. Install the distributor mounting bolt and tighten it finger-tight. Reconnect the vacuum advance line and distributor wiring connector, and reinstall the cap. Reconnect the negative battery cable. Adjust the ignition timing as described in General Information & Maintenance . Then, tighten the distributor mounting bolt securely.
  6.  

2.5L and 4.0L
ENGINE NOT ROTATED
  1. Clean the mounting area of the cylinder block and install a new distributor mounting gasket.
  2.  

On some models there is a fork on the distributor housing. The slot in the fork aligns with the distributor hold-down bolt hole in the engine block. The distributor is correctly installed when the rotor is correctly positioned and the slot is aligned with the hold-down bolt hole. On these computer controlled distributors, initial ignition timing is not adjustable.

  1. Align the rotor tip with the scribe mark on the distributor housing during removal, then turn the rotor approximately 1 / 8 turn counterclockwise past the scribe mark.
  2.  
  3. Slide the distributor shaft down into the engine. It may be necessary to move the rotor and shaft slightly to engage the distributor shaft with the oil pump slot. Align the scribe mark on the distributor housing with the mark on the cylinder block.
  4.  

Ensure that the distributor is fully seated against the cylinder block. It may be necessary to slightly rotate (bump) the engine while applying light downward force to fully engage the distributor shaft with the oil pump drive gear shaft.

  1. Install the distributor shaft hold-down and bolt. Tighten the bolt to 17 ft. lbs. (23 Nm).
  2.  
  3. Install distributor cap and ignition wires. Insure that the wires are routed correctly before attempting to start engine.
  4.  

ENGINE ROTATED
  1. Rotate the engine until the No.1 piston is at TDC compression.
  2.  
  3. Using a flat-bladed screwdriver, in the distributor hole, rotate the oil pump gear so that the slot in the oil pump shaft is in the correct position (see illustration).
  4.  
  5. With the distributor cap removed, install the distributor so that the rotor is positioned correctly (see illustration). Insure that the distributor is fully seated against the cylinder block. If not, remove the distributor and perform the entire procedure again.
  6.  
  7. Tighten the hold-down bolt.
  8.  
  9. Install distributor cap and ignition wires. Insure that the wires are routed correctly before attempting to start engine.
  10.  

 
label.common.footer.alt.autozoneLogo