2007 5.3 Silverado oil consumption

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by jrlawre80, Dec 19, 2011.

  1. jrlawre80

    jrlawre80 New Member

    I have a 07 silverado 5.3l crew cab with 51000 miles. I am having to add a quart of oil after about 1500 miles ! I have not noticed any leaks on the bottom end of motor and also have noticed the occasional puff of blue smoke if it has been sitting all night and I get in and go to a call. im wondering if anyone else has been having oil consumption issues ? Thanks
     
  2. 99'HEARTBEAT

    99'HEARTBEAT Epic Member Staff Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

    Welcome to the Site......Here is a G.M. TSB that has Information Regarding Oil Consumption and/or Blue Exhaust Smoke on the 5.3 Liter,

    #PIP4492C: Excessive Oil Consumption and/or Blue Exhaust Smoke - Inspect PCV Baffle Drain Holes and Valve Train Oil Flow - keywords cover high lifter replacement rocker - (Mar 13, 2009)

    Subject: Excessive Oil Consumption and/or Blue Exhaust Smoke - Inspect PCV Baffle Drain Holes and Valve Train Oil Flow


    Models: 2009 Buick Lacrosse Super, Allure Super (Canada Only)

    2004-2007 Buick Rainier

    2004-2009 Cadillac CTS-V

    2003-2009 Cadillac Escalade

    2003-2006 Chevrolet SSR

    2003-2009 Chevrolet Avalanche, Corvette, Express, Silverado, Suburban, Tahoe, Trail Blazer

    2006-2009 Chevrolet Impala

    2006-2007 Chevrolet Monte Carlo

    2003-2009 GMC Envoy, Savana, Sierra, Yukon

    2003-2009 Hummer H2

    2008-2009 Hummer H3

    2006-2008 Pontiac Grand Prix

    2008-2009 Pontiac G8

    2005-2009 Saab 97x

    The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI (Preliminary Information).

    Condition/Concern::
    On rare occasions, some customers may complaint of excessive oil consumption and/or blue exhaust smoke.

    This may be the result of over-aggressive valve lifters and/or plugged PCV baffle drain holes in the valve cover that has the PCV vacuum pipe attached to it. This may also be the result of the same PCV baffle being improperly sealed to the valve cover if this concern has occurred since the vehicle was new or shortly after this valve cover was replaced.

    Recommendation/Instructions:
    Important: For 2007 Full Size Trucks and Utilities with the 5.3L Engine (RPO LC9 - VIN 3), please refer to the latest version of PIP4574 for recommendations. For all others, refer to the recommendations below.

    If bulletin 01-06-01-011 identifies excessive oil consumption but SI diagnosis does not isolate the cause of it, remove the valve cover that has the PCV vacuum pipe attached to it and perform the following suggestions:

    1) Check for an over-aggressive lifter by monitoring oil flow at the top of each push rod with the engine at idle. It should not be necessary to raise the RPM to check for an over-aggressive lifter. Very little flow should be observed at an idle. It will be obvious if an over-aggressive lifter is present because its flow will be greatly excessive when compared with the others and a great deal of cleanup will be required. Replace any over-aggressive lifter(s) and re-evaluate the concern.

    2) Inspect the PCV baffle drain holes shown below to see if they are plugged with hardened oil deposits. If they are plugged, replace the valve cover, ensure that the customer is changing their oil according to the maintenance schedule in their owner's manual, and re-evaluate the concern. Generally, this would not be a concern until several thousand miles have accumulated.

    3) Inspect the PCV baffle to ensure that it is properly sealed to the valve cover by flipping it over and adding a little oil to the corner of the valve cover as shown below. The oil should stay in place as shown on the 2 outer valve covers below. If the oil drains into the PCV baffle as pointed out on the middle valve cover below, replace the valve cover. Generally, if this is the cause of the concern, it would have been present early in the life of the vehicle or shortly after valve cover replacement.

    Important: If Step 2 or 3 leads to valve cover replacement, perform Step 3 on the replacement valve cover before installing it.

    http://gsi.xw.gm.com/image_en_us/gif/000/002/195/2195879.gif
    PCV Baffle Drain Holes Described in Step 2

    http://gsi.xw.gm.com/image_en_us/gif/000/002/245/2245145.gif
    PCV Baffle Comparison Described in Step 3

    Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
     
  3. jrlawre80

    jrlawre80 New Member

    Ok thanks. I took it to the shop and they added dye and told me to come back in after about 1000 miles. To check consumption and for any leaks.
     
  4. Bowtied

    Bowtied Rockstar 100 Posts

    can someone explain how to use dye, like the techs at this posters shop used to check for oil consumption? this seems like a nifty idea and something i'd like to do (my vehicle seems to be consuming a slight bit of oil as well.)
     
  5. Pikey

    Pikey Moderator Staff Member 3 Years ROTM Winner 1000 Posts

    Just buy the kit, pour in the dye, drive it around for awhile and then crawl under the truck with the light and look for the glow.
     
  6. Bowtied

    Bowtied Rockstar 100 Posts

    i see, so there is a kit, this is new info to me.

    edit: this doesnt appear to be what i thought it was, my truck isnt leaking oil its just consuming it. possibly burning it, somewhere around a quart ever 4000 mi, i switched to a synthetic blend to go 10k between OCI and on my 4,000 mile i got a check engine oil level. never got that before on this truck and had to add about 1.5qt's to get it back to Full on the dipstick. (only put 5 qts in at the oil change though, a month later added .5qt)

    Maybe its just coincident, next oil change i'm definitely adding all 6 qts but yeah, this is not what i thought it was
     
  7. Pikey

    Pikey Moderator Staff Member 3 Years ROTM Winner 1000 Posts

    here is one of them
    http://www.tooltopia.com/mastercool...scplp6820217&gclid=CIjY5Zafmr0CFYY7MgodpmEA5g

    There is a company that sells the light and glasses for $40 and then you buy the dye for $10
     

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