Exhaust CAM sensor bank 1

Tiny
MIKE MIRANDA
  • MEMBER
  • 2008 BUICK ENCLAVE
  • 3.6L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
Something is hitting the end of the sensor and break it off.
Tuesday, February 4th, 2020 AT 12:18 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Hi.

Does this happen right away? Is there any noise associated with it?

Here are the directions for replacing the sensor. See if these are the directions you followed. The attached pictures correlate with the directions.

__________________________

2008 Buick Truck Enclave FWD V6-3.6L
Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust
Vehicle Powertrain Management Sensors and Switches - Powertrain Management Sensors and Switches - Computers and Control Systems Camshaft Position Sensor Service and Repair Removal and Replacement Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust
CAMSHAFT POSITION SENSOR REPLACEMENT - BANK 1 (RIGHT SIDE) EXHAUST
Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust

Removal Procedure

pic 1

1. Remove the engine mount strut and bracket.
2. Disconnect the engine wiring harness electrical connector (7) from the bank 1 exhaust camshaft position (CMP) sensor (6).

Pic 2

3. Remove the CMP sensor bolt and sensor (1).

Installation Procedure

pic 3

Notice: Refer to Fastener Notice.

1. Install the CMP sensor (1) and bolt.

Tighten the bolt to 10 N.M (89 lb in).

Pic 4

2. Connect the engine wiring harness electrical connector (7) to the bank 1 exhaust CMP sensor (6).
3. Install the engine mount strut and bracket.

______________________

Let me know. Also, let me know how many times this has happened and if you are using a factor part. If you are and this is the procedure you followed, we need to take off the timing cover to see what has come loose. I'll provide the directions if that needs done.

Let me know.

Joe
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Tuesday, February 4th, 2020 AT 8:38 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,414 POSTS
The most likely culprit would be a bad camshaft actuator assembly item. Being a 2008 and a 3.6 have the timing chains and tensioners been replaced yet? If not they are very likely worn and due for replacement. However if the only issue is the actuator it can be replaced on it's own. You need a special tool EN-48313 to hold the timing chain in position so the actuator can be removed. Without it you would need to remove the entire front cover and remove the timing chain. Then put it all back into time after replacing the actuator.

Remove the lower intake manifold. Remove the right camshaft cover.
Remove the right intake and exhaust camshaft position sensors.
Remove the right intake and exhaust camshaft position actuator solenoids.
Important: Rotate the crankshaft balancer bolt in a clockwise direction ONLY.
Rotate the crankshaft balancer using the balancer bolt until the camshafts are in a neutral (low tension) position. The camshafts will be parallel with the camshaft cover rail. Pic 3

Important: Ensure that the camshaft timing chain and the camshaft position actuators are marked for proper assembly.

Use a paint stick to create an alignment mark (17) on one of the timing chain links and the adjacent tooth on the exhaust camshaft position actuator (18).
Use a paint stick to create an alignment mark (16) on one of the timing chain links and the adjacent tooth on the intake camshaft position actuator (15). Pic 4

Notice: A wrench must be used on the hex of the camshaft when loosening or tightening in order to prevent component damage. Failure to prevent the torque reaction against the timing drive chain can lead to timing drive chain failure.

Use an open end wrench on the hex cast into the left intake and exhaust camshafts and rotate the camshafts toward each other in order to create slack in the chain between the actuators.

Unscrew the EN-48313 so that the legs of the tool are retracted and insert the EN-48313 between the camshaft actuators, rearward of the timing chain until the top line that is scribed in the body of the tool (1) is adjacent to the top surface of the cylinder head (2).
Pic 5

Important: The engine front cover is removed for clarity in the following graphics, but NOT required to perform the procedure.

Ensure that the feet (2) on the legs of the tool are facing the front of the engine.

Partially expand the legs (1) of the EN-48313 by turning the T-shaped handle clockwise. And continue expanding the EN-48313 until the feet (2) contact the timing chain. Do not tighten at this time. Pic 6

Important: Ensure that the foot (1) of the EN-48313 is engaged into one of the link pockets to prevent chain slippage during tightening of the EN-48313. Do not allow the body of the EN-48313 to rotate when tightening the T-handle.

Hand tighten the EN-48313.

Use an open end wrench on the hex cast into the body of the EN-48313 and hand tighten the T-handle.

Use an open end wrench on the hex cast into the right intake and exhaust camshafts and rotate the camshafts towards each other in order to create slack in the chain between the actuators.

The EN-48313 is now properly installed to hold the timing chain in position. Pic 7

Use an open end wrench on the hex cast into the camshaft in order to prevent engine rotation when loosening the camshaft position actuator bolt.
Remove the right exhaust camshaft position actuator bolt.
Remove the right exhaust camshaft position actuator. When removing the actuator, place the chain on the engine cover side of the actuators. Pic 8

Rotate the actuator in order to align the opening in the actuator reluctor wheel with the cam sensor boss in the front cover, to allow actuator removal.
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Tuesday, February 4th, 2020 AT 8:42 PM

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