#08-06-01-011H: Malfunction Indicator Lamp On-Check Engine Light, DTCs P0011, P0014, P0021, P0024, P0341, P0346, P0366 or P0391 Set (Check Camshaft End Play and Perform Action as Outlined) - (Jan 8, 2010)

Subject: Malfunction Indicator Lamp On -- Check Engine Light, DTCs P0011, P0014, P0021, P0024, P0341, P0346, P0366, or P0391 Set (Check Camshaft End Play and Perform Action as Outlined)

Models: 2007-2009 Buick LaCrosse, Allure (Canada Only)
2010 Buick LaCrosse
2007-2010 Buick Enclave
2007-2009 Cadillac CTS, SRX, STS
2010 Cadillac CTS, CTS Wagon
2008-2010 Chevrolet Equinox, Malibu
2010 Chevrolet Camaro
2007-2010 GMC Acadia
2007-2009 Pontiac G6
2008-2009 Pontiac G8, Torrent
2007-2010 Saturn AURA, OUTLOOK
2008-2010 Saturn VUE
with 2.8L or 3.6L High Feature V6 Engine (VINs D, T, V, 7 -- RPOs LP1, LLT, LY7)

Attention: This bulletin also applies to any of the above models that may also be export vehicles.

This bulletin is being revised to add the 2010 Camaro and update the Camshaft Position Actuator to Front Camshaft Cap Measurement procedure to include end play check for both actuator designs. Please discard Corporate Bulletin Number 08-06-01-011G (Section 06 -- Engine/Propulsion System).
Condition

Some customers may comment that the check engine light is on.

Upon investigation, the technician may find one or more of the following DTCs stored:
• P0011
• P0014
• P0021
• P0024
• P0341
• P0346
• P0366
• P0391


Important: The set DTC will determine which camshafts (bank 1 or bank 2) should be checked.

Remove the camshaft cover and check camshaft end play on both camshafts in the suspect head using one of the methods listed below.

Is camshaft end play equal to or over 0.40 mm (0.016 in)?


Continue diagnosis using SI and call GM Technical Assistance, if necessary.

Check the gap between BOTH camshaft position actuators and the front camshaft cap using the Camshaft Position Actuator to Front Camshaft Cap Measurement Procedure listed below.

Does the 2.0 mm or 2.5 mm hex (allen) wrench fit between the position actuator and cap?


Install the camshaft thrust washers using the Camshaft Thrust Washer Installation Procedure listed below.


Replace the cylinder head and install thrust washers using the Camshaft Thrust Washer Installation Procedure listed below.

Camshaft End Play Measurement Procedure

Remove the camshaft cover from the suspect cylinder head.

Object Number: 2056722 Size: SH
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Two methods for measuring camshaft end play:
Method 1: Dial Indicator



Object Number: 2106320 Size: SH
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Object Number: 2106322 Size: SH
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• Set-up a dial indicator on the camshaft to be measured. Set the dial indicator to measure the axial movement of the camshaft. To minimize measurement error, the dial indicator needs to be on the same axis as the camshaft. A magnetic mount can be placed on the frame rail or a piece of steel plate can be bolted to the top of the head as a reference surface for the dial indicator. The dial indicator should have 0.1 mm (0.001 in) of resolution.

Object Number: 2056724 Size: SH
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Object Number: 2062090 Size: SH
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• Position a screwdriver or small pry bar between the camshaft cap and camshaft lobe. Apply force to move the camshaft rearward.
• Be cautious not to damage the camshaft lobe while applying this force.
• Zero the dial indicator.
• Apply force to move the camshaft forward (towards the camshaft phasers).
• Read the dial indicator. This is the end play of the camshaft shaft.

Notice: Do not use the phaser bolt as a pry point. This may cause damage to the camshaft sensor target wheel or the head to camshaft cover sealing surface.
Method 2: Caliper



The caliper should have 0.1 mm (0.001") of resolution.

Object Number: 2056726 Size: SH
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• Position a screwdriver or medium pry bar between the camshaft cap and camshaft lobe. Be cautious not to damage the camshaft lobe while applying this force.
• Apply force to move the camshaft rearward.
• Measure and record the distance between the camshaft cap and the camshaft lobe.
• Re-measure and record the distance between the camshaft cap and camshaft lobe. Subtract the two readings; this is the camshaft shaft end play.
Camshaft Position Actuator to Front Camshaft Cap Measurement Procedure

Important: Before performing this procedure, inspect the rear of the camshaft position actuator. Refer to the pictures below to determine which actuator is installed on the vehicle. Use the appropriate procedure listed below.
Aisin Actuator (5 Screw Design, Use 2.5 mm Hex Wrench)

Object Number: 2177225 Size: SH
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Delphi Actuator (4 Screw Design, Use 2.0 mm Hex Wrench)

Object Number: 2177223 Size: SH
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5 Screw Aisin Design Actuator

Use a 2.5 mm hex (allen) wrench as a determination gauge to measure the gap between the rear of the camshaft position actuator and the front camshaft cap of both camshafts of the suspect head.

1. Position a screwdriver or medium pry bar between the camshaft cap and camshaft lobe.
2. Apply force to move the camshaft FORWARD. Be cautious not to damage the camshaft lobe while applying this force.

Object Number: 2177226 Size: SH
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3. With the camshaft moved fully FORWARD, try to insert the 2.5 mm hex (allen) wrench between the intake camshaft position actuator and the front camshaft cap. It may be necessary to turn the wrench to align the flat sides of the wrench with the gap between the actuator and the cap.
4. If the wrench fits between the camshaft position actuator and the front camshaft cap, it will be necessary to replace the cylinder head assembly with the appropriate part number listed in this bulletin. WHEN REPLACING THE CYLINDER HEAD, ALSO INSTALL A THRUST WASHER BETWEEN EACH CAMSHAFT POSITION ACTUATOR AND THE FRONT CAMSHAFT CAP.
5. If the wrench DOES NOT fit between the camshaft position actuator and the front camshaft cap, install the camshaft thrust washers between BOTH camshaft position actuators and the front camshaft cap on the suspect head. Follow the Camshaft Thrust Washer Installation procedure below.

4 Screw Delphi Design Actuator

Use a 2.0 mm hex (allen) wrench as a determination gauge to measure the gap between the rear of the camshaft position actuator and the front camshaft cap of both camshafts of the suspect head.

1. Position a screwdriver or medium pry bar between the camshaft cap and camshaft lobe.
2. Apply force to move the camshaft FORWARD. Be cautious not to damage the camshaft lobe while applying this force.

Object Number: 2177226 Size: SH
Click here for detailed picture of above image.
3. With the camshaft moved fully FORWARD, try to insert the 2.0 mm hex (allen) wrench between the intake camshaft position actuator and the front camshaft cap. It may be necessary to turn the wrench to align the flat sides of the wrench with the gap between the actuator and the cap.
4. If the wrench fits between the camshaft position actuator and the front camshaft cap, it will be necessary to replace the cylinder head assembly with the appropriate part number listed in this bulletin and replace both actuators. It is not necessary to replace the camshaft position actuators on the cylinder head that is not being replaced. WHEN REPLACING THE CYLINDER HEAD, ALSO INSTALL A THRUST WASHER BETWEEN EACH CAMSHAFT POSITION ACTUATOR AND THE FRONT CAMSHAFT CAP.
5. If the wrench DOES NOT fit between the camshaft position actuator and the front camshaft cap, install the camshaft thrust washers between BOTH camshaft position actuators and the front camshaft cap on the suspect head. Follow the Camshaft Thrust Washer Installation procedure below.

Camshaft Thrust Washer Installation Procedure

Tip
The cylinder head gasket kit contains all the gaskets and seals necessary to perform this repair.

1. Disconnect the engine wiring harness electrical connectors from the intake and exhaust camshaft position (CMP) actuator solenoid valves and sensors.
2. Remove the intake and exhaust CMP sensor bolts and sensors.
3. Remove the intake and exhaust CMP actuator solenoid valve bolts and valves.

Object Number: 1306293 Size: SH
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Important: Rotate the crankshaft balancer bolt in a clockwise direction ONLY.
4. Rotate the crankshaft balancer using the balancer bolt until the camshafts are in a neutral (low tension) position. The flats on the rear of the camshafts will be parallel with the camshaft cover rail (1).

Object Number: 1306391 Size: SH
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5. Use a paint stick to create an alignment mark on one of the timing chain links (2) and the adjacent tooth on the exhaust camshaft position actuator (1).
6. Use a paint stick to create an alignment mark on one of the timing chain links (3) and the adjacent tooth on the intake camshaft position actuator (4).
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 bolts. Slightly loosen the camshaft position actuator bolts. DO NOT remove the bolts.

Object Number: 1858601 Size: SH
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8. Unscrew the Timing Chain Retention Tool EN-48313 so that the legs of the tool are retracted.
9. Insert the Timing Chain Retention Tool EN-48313 between the camshaft actuators, rearward of the timing chain until the bottom line that is scribed in the body of the tool (2) is adjacent to the top surface of the cylinder head (1). This is the approximate installed position.

Object Number: 1858602 Size: SH
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Important: The engine front cover is removed for clarity in the following graphics, but NOT required to perform the procedure.
10. Ensure that the feet (4) on the legs of the tool are facing the front of the engine.
11. Partially expand the legs (1, 3) of the Timing Chain Retention Tool EN-48313 by turning the T-shaped handle clockwise.
12. Insert the leg of the tool (1) behind the timing chain guide (2).
13. Continue expanding the Timing Chain Retention Tool EN-48313 until the legs (1, 3) contact the timing chain. Do not tighten at this time.

Object Number: 1858603 Size: SH
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Important: Ensure that the foot (1) of the Timing Chain Retention Tool EN-48313 is engaged into one of the link pockets to prevent tool slippage during tightening of the Timing Chain Retention Tool EN-48313.
14. Hand tighten the Timing Chain Retention Tool EN-48313. If installed correctly, there should be a small amount of slack in the timing chain between the camshaft position actuator sprockets.

Object Number: 1858605 Size: SH
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15. The Timing Chain Retention Tool EN-48313 is now properly installed to hold the timing chain in position.

Object Number: 1858699 Size: SH
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Tip
It is not necessary to completely remove the camshaft actuator from the engine in order to install the thrust washers.
16. Remove the intake camshaft position actuator bolt.

Object Number: 2173634 Size: SH
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17. Move the camshaft position actuator forward enough to slip the camshaft thrust washer over the front of the intake camshaft and position it against the cylinder head.
18. Position the intake camshaft actuator to the camshaft and install the actuator bolt hand tight. If necessary, slightly rotate the camshaft to engage the timing pin.
19. Remove the exhaust camshaft position actuator bolt.
20. Move the camshaft position actuator forward enough to slip the camshaft thrust washer over the front of the exhaust camshaft and position it against the cylinder head.
21. Position the exhaust camshaft actuator to the camshaft and install the actuator bolt hand tight. If necessary, slightly rotate the camshaft to engage the timing pin.
22. Remove the Timing Chain Retention Tool EN-48313.

Object Number: 1858699 Size: SH
Click here for detailed picture of above image.
23. Tighten the intake and exhaust camshaft position actuator bolts. Use an open end wrench on the hex cast into the camshaft in order to prevent engine rotation when tightening the camshaft position actuator bolts. Verify that the paint marks on the timing chain and camshaft position actuators are aligned.

Tighten
Tighten the bolts to 58 N·m (43 lb ft).
24. Install the intake and exhaust camshaft position actuator solenoid valves and bolts.

Tighten
Tighten the bolts to 10 N·m (89 lb in).
25. Install the intake and exhaust camshaft position sensors and bolts.

Tighten
Tighten the bolts to 10 N·m (89 lb in).
26. Connect the engine wiring harness electrical connectors to the intake and exhaust camshaft position (CMP) sensors and actuator solenoid valves.

Parts Information (edited for length)

Important: Please be advised that complete cylinder head assemblies for Enclave, Acadia and OUTLOOK models equipped with the 3.6L LY7 (high output) engine are NO longer available. If a replacement cylinder head "assembly" is required on these models, you must use the cylinder head part number listed as well as all the individual parts listed to build up a complete head "assembly." Please note that the valves and other parts not listed can be transferred from the original head to the new cylinder head being assembled. In addition, new valve springs are to be used while the valves may be reused.

Important: When ordering the cylinder head gasket for cylinder head replacement, the kit does not include the M11 head bolts or exhaust manifold gaskets, which will need to be ordered separately.

For part numbers and usage of necessary gaskets, refer to Group 00 6-Cylinder Engine of the appropriate Parts Catalog. Saturn Retailers should refer to the appropriate Parts & Illustration Catalog for the vehicle.
Warranty Information (Thrust Washer Installation) (Buick LaCrosse/Allure)

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.


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