Question about Oldsmobile Alero

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When replacing the camshaft sensor in a 1999 alero 3.4 v6...does the intake manifold have to be removed?

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No i will post the procedure below.


3.4L REMOVAL OF CAM SENSOR

1. Turn OFF the ignition.

2. Remove the serpentine drive belt.

3. Disconnect the sensor electrical connector.

4. Remove the power steering pump, if required.

5. Remove the attaching bolt.

6. Remove the sensor.

7. Inspect the sensor for wear, cracks or leakage if the sensor is not being replaced.



To install:

1. Lubricate the O-ring with clean engine oil and replace if damaged.

2. Install the camshaft Position Sensor.

3. Tighten the retaining bolt to 8 ft. lbs. (10 Nm).

4. Connect the sensor electrical connector.

5. Install the power steering pump, if removed.

6. Reinstall the serpentine drive belt.


Posted on May 25, 2009

  • Michael Masters
    Michael Masters May 25, 2009

    WARNING---- DO NOT OVER TORQUE

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  • Contributor
  • 10 Answers

No, but the p.s. pump does.

Posted on May 25, 2009

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Can you tell me torque requirement for intake manifold bolts on a 1999 Alero V6?


upper intake bolts torque is 18 ft lbs - lower intake bolts torque is 115 inch lbs.

Sep 21, 2011 | 1999 Oldsmobile Alero

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1999 Alero : Fuel leaking at a fitting where fuel line goes under intake manifold. Does manifold have to be removed to remove or tighten this fitting?


IF FUEL LINE FITTING LEAKING UNDER INTAKE YOU HAVE TO REMOVE TOP INTAKE MANIFOLD TO REPLACE FUEL LINE FITTING O RING.

Sep 15, 2011 | 1999 Oldsmobile Alero

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Where is the cam position sensor located on a 99 oldsmobile alero, how easy is it to install?


camshaft position sensor location on the V6 engine located at the front of the engine block below the power steering pump. the 4 cylinder engine camshaft position sensor location below ignition coil cover where coil cover say 2.4L TWIN camshaft sensor in that location below coil cover. you will see red or red white wires connected to it.

Apr 14, 2011 | 1999 Oldsmobile Alero

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Cylinderhead torque stc.


Cylinder Head Removal & Installation SOHC To Remove:
  1. Relieve fuel system pressure.
  2. Remove timing belt cover. Camshaft timing marks kia-03-20-7032.gif

  3. Turn crankshaft until timing mark on front housing and the arrow "2" on the camshaft pulley align.
  4. Loosen lock bolt on tensioner.
  5. Pry tensioner away from timing belt and tighten lock bolt to relieve tension on the timing belt.
  6. Remove timing belt from camshaft pulley.
  7. Disconnect battery negative cable.
  8. Remove 3 bolts that secure accelerator cable and air intake hose to cylinder head cover.
  9. Detach accelerator cable and place off to side.
  10. Remove the following;
    • Air hose
    • Air ISC air hose
    • Breather hose
    • Vacuum hose from air intake hose
  11. Disconnect mass air flow sensor electrical connector.
  12. Remove air intake hose.
  13. Remove PCV valve from cylinder head cover.
  14. Remove ISC air hose from idle speed actuator.
  15. Remove air hose from behind intake manifold.
  16. Remove 2 screws from high tension wire protectors.
  17. Detach wire loom from holder at rear of cylinder head cover.
  18. Detach vacuum tube at rear of cylinder head cover.
  19. Remove vacuum pipe. Cylinder Head Cover kia-03-20-7042.gif

  20. Remove 7 cylinder head cover bolts.
  21. Remove cylinder head cover and gasket.
  22. Disconnect 2 ignition coil electrical connectors.
  23. Disconnect 2 fuel injection electrical connectors at rear of cylinder head.
  24. Disconnect the following electrical connectors;
    • Oxygen sensor
    • Throttle position sensor
    • Idle speed actuator
    • Oil pressure switch
    • EGR vacuum solenoid valve at intake manifold
  25. Disconnect heater hose from elbow.
  26. Disconnect brake booster vacuum hose and cruise control vacuum hose from surge tank.
  27. Detach wire harness from rear of cylinder head.
  28. Disconnect purge control solenoid vacuum hose from intake manifold.
  29. Disconnect fuel hose from fuel connector assembly.
  30. Remove grounding bracket.
  31. Remove 4 bolts and intake manifold bracket.
  32. Remove starter.
  33. Detach water bypass hose from bypass pipe.
  34. Disconnect water hoses from oil cooler.
  35. Disconnect fuel hose from fuel pipe.
  36. Remove exhaust manifold heat shield.
  37. Remove exhaust flange nuts and front exhaust bracket bolt.
  38. Lower exhaust system. Cylinder head bolt loosening sequence kia-03-20-7050.gif

  39. Loosen cylinder head bolts in 3 steps in proper sequence.
  40. Remove cylinder head bolts and washers.
  41. Remove cylinder head, intake manifold and exhaust manifold as an assembly.
To Install:
  1. Install NEW cylinder head gasket.
  2. Install cylinder head, intake manifold and exhaust manifold as an assembly.
  3. Tighten cylinder head bolts in 3 steps in reverse sequence that was used during removal. Tighten bolts to 62 ft lb (84 Nm).
  4. Install front exhaust bracket bolt. Tighten bolt to 20 ft lb (27 Nm).
  5. Install NEW lower exhaust flange gasket and 3 nuts. Tighten nuts to 24 ft lb (31 Nm).
  6. Install exhaust manifold heat shield. Tighten nuts to 35 in lb (4 Nm).
  7. Connect fuel hose to pipe.
  8. Connect 2 hoses to oil cooler.
  9. Attach water bypass hose to bypass pipe.
  10. Install starter and bolts. Tighten bolts to 34 ft lb (46 Nm).
  11. Install intake manifolds bracket and 4 bolts. Tighten bolts to 32 ft lb (45 Nm).
  12. Install grounding bracket.
  13. Connect fuel hose to fuel connector assembly.
  14. Connect the following electrical connectors;
    • Oxygen sensor
    • Throttle position sensor
    • Idle speed actuator
    • Oil pressure switch
    • EGR vacuum solenoid valve at intake manifold
  15. Connect purge control solenoid vacuum hose to intake manifold.
  16. Attach wire harness from rear of cylinder head.
  17. Connect brake booster vacuum hose and cruise control vacuum hose to surge tank.
  18. Connect heater hose to elbow.
  19. Connect 2 fuel injection electrical connectors at rear of cylinder head.
  20. Connect 2 ignition coil electrical connectors.
  21. Install cylinder head cover.
  22. Install 7 cylinder head cover bolts. Tighten bolts to 60 in lb (7 Nm).
  23. Install vacuum pipe and 2 bolts at rear of cylinder head cover. Tighten bolts to 60 in lb (7 Nm).
  24. Connect vacuum tube to pipe.
  25. Connect loom holder to rear of cylinder head cover.
  26. Install 2 screws to high tension wire protectors.
  27. Install air hose to behind intake manifold.
  28. Install ISC air hose to idle speed actuator.
  29. Install PCV valve to cylinder head cover.
  30. Install air intake hose.
  31. Connect mass air flow sensor electrical connector.
  32. Install the following;
    • Air hose
    • Air ISC air hose
    • Breather hose
    • Vacuum hose from air intake hose
  33. Attach accelerator cable.
  34. Install 3 bolts that secure accelerator cable and air intake hose to cylinder head cover. Timing belt pulley timing marks kia-03-20-7035.gif

    NOTE: Timing belt pulley timing mark and timing mark must be aligned.
    Camshaft timing marks kia-03-20-7032.gif

    NOTE: The arrow at "2" on camshaft pulley must be aligned with timing mark on front housing.
  35. Install timing belt.
  36. Install timing belt cover.
  37. Pressurize fuel system.
  38. Start engine and check ignition timing.

Jul 11, 2010 | 1999 Kia Sportage

2 Answers

My 2002 alero has 65,000 miles and ran great until I was in an accident a few days ago. I tried to start it and it wouldn't start. The check engine light came on and the low track light too. After a few...


Sounds like the Crankshaft sensor is damaged and needs to be replaced.
The Camshaft position sensor works along with the Crankshaft position sensor.
Determining the timing and injectors’ pulse, to deliver fuel to the cylinders.
The Camshaft position sensor is a hall sensor, which it triggered by a magnet in the Camshaft.

On 4 cyl(2.4) models the Camshaft position sensor is located to the left side of the timing cover.
On the V6(3.1 & 3.4) it’s located at the front of the engine block (passenger side), below the power steering pump.
Check the terminals for breaks and looseness, repair if needed.

Here is the plug indentification picture.
The wires are different for the 4cyl and V6, Please note below.
Though the plugs are the same three wire connectors.

Plug is as listed : 1 - Camshaft position sensor signal on 4 cyl,
12 volt supply on the V6
2 – Sensor ground 4 cylinder,
Camshaft position sensor signal on the V6
3 – 12 volt supply on the 4 cylinder,
sensor ground on the V6

First check for voltage and ground circuits from the PCM.
Disconnect the electrical connector from the Camshaft sensor and connect the positive lead (on the wiring harness) of the voltmeter to the red wire(#3) on the 4 cyl and the red/white wire on the V6(#1).

Connect the negative to the pink/black wire on the 4 cyl(#2), or black on the V6(#3).
Turn the key on, the voltmeter should read 12 volts, if not check the wiring to the PCM.
If the circuits are good, have the PCM checked out by a Dealer or other properly trained shop.

To check the operations;
Reconnect the Camshaft position sensor, using a probe to back probe the brown/white wire terminal of the camshaft PS. Plug locations on4 cyl (#1) and theV6(#2)
Connect the positive lead of the voltmeter to the probe and the negative to a good engine ground.
Turn the key on, the voltmeter should read approx 10 volts.

*Rotating the engine by hand with a breaker bar attached to the crank pulley. Watching the voltmeter, the voltage should remain a steady 10volts then quickly drop to zero and back to 10vlts as the magnet passes the sensor.
If the tests results are incorrect then replace the camshaft position sensor.

* Rotating the engine slowly, and at least two full revolutions of the engine for accurate results.


Camshaft sensor Replacement

On the 4 cylinder
- Disconnect the electrical connector
- Remove the camshaft position sensor-mounting bolt and pull the sensor out of the camshaft cover.
- Replace the “O” ring and lightly lubricate it with clean engine oil.
- Install in the reverse of those procedures.

On V6
- Remover the drive belt.
- Remove the power steering unit but don’t disconnect the hoses, just lay it aside.
- Disconnect the electrical connector from the harness; paying attention to the route the wires are in.
- Remove the camshaft ps mounting bolt and pull the sensor out of the block.
- Install in reverse procedure.

If the sensor flange breaks off and you cant remove the CPS, try screwing a heavy screw into the top of the sensor and pulling it out with plyers/vise-grips.

Good luck and thank you for using Fixya

Mar 10, 2010 | 2002 Oldsmobile Alero

2 Answers

Is it difficult to replace the 02 sensor?


o2 sensors are easy u can borrow or buy the modified socket or use a wrench to remove the o2 sensor as to the intake manifold thats a little more work u have to move and remove alot of the components on top of engine if u want to check and see how hard it will be buy a chilton or haynes auto repair manual about $19 gives detail breakdowns on how to repair ur vehicle or go to library in reference section borrow auto repair manual that covers ur car will show how its done

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