LS4 that burn oil step in here.
04-27-2011, 01:41 PM
#22
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I just looked up the P/N for the AFM shield, and it doesn't fit the LS4. Do you have the right P/N?
Edit: Just realized that the update was for OTHER vehicles with an aluminum block V8 and DOD. Oops! Do you think that the shield referenced will fit the LS4? It isn't listed as "compatible" but that doesn't mean that it won't fit.
Edit: Just realized that the update was for OTHER vehicles with an aluminum block V8 and DOD. Oops! Do you think that the shield referenced will fit the LS4? It isn't listed as "compatible" but that doesn't mean that it won't fit.
Last edited by MillerMonteSS; 04-27-2011 at 05:51 PM. Reason: I misread the bulletin...
04-28-2011, 11:24 AM
#23
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In GM's latest update of the PI, it indicates that it will not fit.
#PIP4814B: Excessive Oil Consumption And/ Or Blue Exhaust Smoke - (Mar 16, 2011)
Subject: Excessive Oil Consumption and/or Blue Exhaust Smoke
Models: Models: 2008-2009 Buick LaCrosse, Allure (Canada Only)
2006-2009 Chevrolet Impala SS
2006-2007 Chevrolet Monte Carlo SS
2005-2008 Pontiac Grand Prix GXP
With AFM (Active Fuel Management) 5.3L Engine (RPO LS4)
--------------------------------------------------------------------------------
This PI was superseded to repair described in this PI. Please discard PIP4814A.
--------------------------------------------------------------------------------
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may complain that their vehicle has been using approximately 1 quart of oil every 500-1,000 miles. In most cases, the customer will advise that this did not start until the engine accumulated approximately 30,000 miles or more. In some cases, the customer may note that this is more apparent when driving at highway speed. In rare instances, a SES light and engine misfire may be encountered with a P0300 DTC.
Upon inspection, an oil fouled spark plug(s) may be noted. In most cases, static compression and cylinder leakage testing will appear normal. Excessive oil may or may not be found in the intake manifold.
In most cases, this is the result of stuck oil control rings. Generally, the stuck oil control rings are the result of excessive oil on the cylinder walls. The excessive oil can come from the PCV system and/or the AFM pressure relief valve in the oil pan.
Recommendation/Instructions:
If this concern is encountered, follow the steps below:
•Visually inspect the entire engine and the underside of the vehicle for any evidence of oil leaks and repair them as necessary.
•If the vehicle has an engine misfire due to a spark plug that is obviously oil fouled, skip to step 3 since this proves that it has an obvious oil consumption concern. If not, perform an oil consumption test as outlined in the latest version of oil consumption of 01-06-01-011 to verify the concern before proceeding to step 3. Allow the vehicle to sit on a level surface with the engine off This PI was superseded to repair described in this PI. Please discard PIP4814A. for at least 10 minutes to allow the entire engine to drain back to the oil pan before checking the engine oil level and adding oil.
Compare the oil consumption test results to one of the scenarios below to determine further direction:
If oil consumption is Less than 1 quart of oil every 2,000 miles and no low oil light has been experienced, no repairs should be performed as this should be considered acceptable oil consumption as outlined in the latest version of 01-06-01-011.
If oil consumption is Less than 1 quart of oil every 2,000 miles but the customer has experienced a low oil light, check for proper oil level sensor operation.
If oil consumption is More than 1 quart every 2,000 miles, proceed to step 3.
•Perform the PCV inspections outlined in the latest version of PIP4492.
•Check for any obvious valve seal concerns and repair as necessary.
•If the steps above are followed without isolating the cause of this concern, this is most likely the result of AFM pressure relief valve oil accumulating on the bottom of the cylinders when active fuel management is enabled. Over time, this may eventually lead to the stuck oil control rings, poor ring sealing, and increased oil consumption.
Procedures are being developed to repair this by cleaning the oil control rings and redirecting the AFM pressure relief valve oil away from the cylinder walls. The related parts and procedures should be available during the 2011 calendar year but an exact date is not available at this time. As soon as the repair becomes available, this PI will be updated with additional details, or a separate bulletin will be released. Also note that the AFM shield described in the latest version of 10-06-01-008 will not fit the LS4 engine.
#PIP4814B: Excessive Oil Consumption And/ Or Blue Exhaust Smoke - (Mar 16, 2011)
Subject: Excessive Oil Consumption and/or Blue Exhaust Smoke
Models: Models: 2008-2009 Buick LaCrosse, Allure (Canada Only)
2006-2009 Chevrolet Impala SS
2006-2007 Chevrolet Monte Carlo SS
2005-2008 Pontiac Grand Prix GXP
With AFM (Active Fuel Management) 5.3L Engine (RPO LS4)
--------------------------------------------------------------------------------
This PI was superseded to repair described in this PI. Please discard PIP4814A.
--------------------------------------------------------------------------------
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may complain that their vehicle has been using approximately 1 quart of oil every 500-1,000 miles. In most cases, the customer will advise that this did not start until the engine accumulated approximately 30,000 miles or more. In some cases, the customer may note that this is more apparent when driving at highway speed. In rare instances, a SES light and engine misfire may be encountered with a P0300 DTC.
Upon inspection, an oil fouled spark plug(s) may be noted. In most cases, static compression and cylinder leakage testing will appear normal. Excessive oil may or may not be found in the intake manifold.
In most cases, this is the result of stuck oil control rings. Generally, the stuck oil control rings are the result of excessive oil on the cylinder walls. The excessive oil can come from the PCV system and/or the AFM pressure relief valve in the oil pan.
Recommendation/Instructions:
If this concern is encountered, follow the steps below:
•Visually inspect the entire engine and the underside of the vehicle for any evidence of oil leaks and repair them as necessary.
•If the vehicle has an engine misfire due to a spark plug that is obviously oil fouled, skip to step 3 since this proves that it has an obvious oil consumption concern. If not, perform an oil consumption test as outlined in the latest version of oil consumption of 01-06-01-011 to verify the concern before proceeding to step 3. Allow the vehicle to sit on a level surface with the engine off This PI was superseded to repair described in this PI. Please discard PIP4814A. for at least 10 minutes to allow the entire engine to drain back to the oil pan before checking the engine oil level and adding oil.
Compare the oil consumption test results to one of the scenarios below to determine further direction:
If oil consumption is Less than 1 quart of oil every 2,000 miles and no low oil light has been experienced, no repairs should be performed as this should be considered acceptable oil consumption as outlined in the latest version of 01-06-01-011.
If oil consumption is Less than 1 quart of oil every 2,000 miles but the customer has experienced a low oil light, check for proper oil level sensor operation.
If oil consumption is More than 1 quart every 2,000 miles, proceed to step 3.
•Perform the PCV inspections outlined in the latest version of PIP4492.
•Check for any obvious valve seal concerns and repair as necessary.
•If the steps above are followed without isolating the cause of this concern, this is most likely the result of AFM pressure relief valve oil accumulating on the bottom of the cylinders when active fuel management is enabled. Over time, this may eventually lead to the stuck oil control rings, poor ring sealing, and increased oil consumption.
Procedures are being developed to repair this by cleaning the oil control rings and redirecting the AFM pressure relief valve oil away from the cylinder walls. The related parts and procedures should be available during the 2011 calendar year but an exact date is not available at this time. As soon as the repair becomes available, this PI will be updated with additional details, or a separate bulletin will be released. Also note that the AFM shield described in the latest version of 10-06-01-008 will not fit the LS4 engine.
04-28-2011, 03:47 PM
#25
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With a tune, just disabling DoD itself will not cost you much (if any) MPG. If you or your tuner adjust the fuel tables while tuning out DoD, then you can see more significant gas consumption, as I did. That being said, I would not give up my tune to save my own life...
04-28-2011, 05:14 PM
#26
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so did they extend the warranty of these parts if this problem happens to our vehicles?? Sometimes they will extend the warranty if a major problem can occur like this
04-29-2011, 09:35 AM
#27
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My wife took ours in today for the oil issue and the lifters making noise when cold and Holz told my wife they need to do a oil change there, mark off oil levels and we have to take it back to the dealer every 500 miles for 3000 miles. Does this sound like a line of bull or is everybody doing this for this problem?
