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Pics on 1996 lumina 3.4 twin cam timming belt drive

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This pic does not show all timing marks, but I will paste procedure from below.

pics on 1996 lumina 3.4 - 71bccea.gif 1996 3.4L Engines

To install:

  1. Install the camshaft sprockets finger-tight.
  2. Route the timing belt in a counterclockwise direction around the sprockets. Make sure all of the timing belt teeth are fully engaged with all sprockets.
  3. Install the timing belt tensioner actuator pulley. Tighten the retaining bolt/screw to 37 ft. lbs. (50 Nm).
  4. If tensioner oil has been lost, fill the tensioner with synthetic engine oil through the end hole. Fill to the bottom of the plug hole ONLY when the tensioner is fully retracted and the pin is installed.
  5. Install the rubber end plug to the rear of the tensioner actuator. Push until flush and snapped into place. Make sure the end plug has sealed against the case.
  6. Install the tensioner actuator bushing into the side plate.
  7. Install the tensioner actuator and side plate. Make sure the tapered fulcrum of the tensioner actuator is properly seated in the tensioner actuator bracket bushing. Tighten the retaining bolts to 18 ft. lbs. (25 Nm).

Rotate the pulley into the belt a maximum of 11 ft. lbs. (15 Nm) to allow engagement of the actuator shaft into the pulley arm socket.
  1. Pull the lockpin and discard. Retighten the pulley to 15 Nm counterclockwise to seat the pulley into the belt.
  2. Install both right hand (rear bank) camshaft sprockets. Tighten the bolts to 96 ft. lbs. (130 Nm).
  3. Remove tool J 38613-A from the right hand (rear bank) camshaft carrier.
  4. Rotate the crankshaft 360ºclockwise while looking at the front of the engine and align the crankshaft reference marks.
  5. Make sure both right hand camshaft flats are down, then tighten both left hand (front bank) camshaft sprockets to 96 ft. lbs. (130 Nm).
  6. Remove tool J 38613-A from the left hand (front bank) camshaft carrier.
  7. Rotate the crankshaft 720ºclockwise while looking at the front of the engine to seat the timing belt and verify correct timing. Make sure both camshaft flat spots are up on one band and down on the opposing bank.
  8. Install the camshaft carrier covers.
  9. Connect the breather hose to the rear camshaft cover and crankcase vent to the breather manifold.
  10. Install the camshaft timing belt covers, as outlined earlier in this information.
  11. Install the fuel line bracket and bolt.
  12. Install the wiring harness cover at the right strut tower.
  13. Connect the spark plug wires, as tagged during removal.
  14. Attach the PCM electrical connectors.
  15. Connect the power steering lines to the pump.
  16. Install the serpentine drive belt and tensioner.
  17. Install the coolant recovery tank.
  18. Install the upper intake manifold, using a new gasket. Tighten the retaining bolts to 19 ft. lbs. (26 Nm).
  19. Fasten the nuts at the upper intake manifold support bracket. Tighten the nuts to 18 ft. lbs. (25 Nm).
  20. Connect the power brake vacuum hose.
  21. Install the wiring loom bracket for the rear spark plug wires.
  22. Connect the vacuum lines to the upper intake manifold tee.
  23. Attach the electrical connectors to the canister purge solenoid and MAP sensor.
  24. Install the EGR valve, secure with the retaining bolts, then attach the connector.
  25. Connect the PCV valve and vacuum line to the throttle body.
  26. Install the heater hose and bracket to the lower intake manifold.
  27. Install the fuel line bracket and bolt. Uncap and connect the fuel pipes to the fuel rail.
  28. Install the fuel injector sight shield.
  29. Connect the control cables to the throttle body.
  30. Install the air cleaner assembly. Refill the cooling system and refill and bleed the power steering system. Connect the negative battery cable.

Posted on Aug 30, 2010


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