GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 7 of 7

Thread: Oil burnin 5.3

  1. #1

    Default Oil burnin 5.3

    I have a 2008 chevy silverado crew cab 1/2 ton with the 5.3 active fuel management motor in it. Its been continuously burning oil (about two quarts every 3000 miles). So far, the gm mechanics have replaced pistons, rings, valves, valve seals, camshaft, lifters, and bearings. Everything that they have done hasn't reduced the oil consumption issue yet... Any ideas on what else is causing it? The truck now has 108000 miles on it, but the problem began at around 50k.

  2. #2

    Default

    Quote Originally Posted by jjstew View Post
    I have a 2008 chevy silverado crew cab 1/2 ton with the 5.3 active fuel management motor in it. Its been continuously burning oil (about two quarts every 3000 miles). So far, the gm mechanics have replaced pistons, rings, valves, valve seals, camshaft, lifters, and bearings. Everything that they have done hasn't reduced the oil consumption issue yet... Any ideas on what else is causing it? The truck now has 108000 miles on it, but the problem began at around 50k.
    To the Site.....Below is a link to many Thread's Re-guarding Oil Consumption in some of the .....5.3 / 6.0 Liter Engine's...

    Link,
    http://www.google.com/search?q=G.M.+...d506d947e5ee27

    MIKE


    99"SILVERADO
    5.3 l 3.73 l G80
    BLACK BEAR CUSTOM TUNE
    SNUGTOP l COLORMATCH l KATZKIN










  3. #3
    Jr. Engineer racekid91's Avatar
    Join Date
    Feb 2011
    Location
    Green Bay, Wisconsin, United States
    Posts
    275

    Default

    Quote Originally Posted by jjstew View Post
    I have a 2008 chevy silverado crew cab 1/2 ton with the 5.3 active fuel management motor in it. Its been continuously burning oil (about two quarts every 3000 miles). So far, the gm mechanics have replaced pistons, rings, valves, valve seals, camshaft, lifters, and bearings. Everything that they have done hasn't reduced the oil consumption issue yet... Any ideas on what else is causing it? The truck now has 108000 miles on it, but the problem began at around 50k.
    Welcome! Where are you located in Wisconsin? A few of us in Green Bay, and some others around the state. Not quite sure on what your issue is myself. I know that 5.3's have bad oil consumption issues, but usually the things you listed are what the issues are. At least, that's what I've seen from work (I'm a GM Tech)

    1995 Chevy Tahoe

  4. #4
    Legend
    stephan's Avatar
    Join Date
    Sep 2010
    Location
    Far West, Oregon USA,
    Posts
    8,606
    Blog Entries
    1

    Default

    Hey JJ, Welcome to the GM truck club.
    Of the things that you listed, there are only 2 that I think could have caused the oil consumption,,, the valve stem seals, or the piston rings or both. I don't know why they would replace the other things, but it sure was nice to get that many new parts. As far as what's causing it now, I would suspect that the cylinder bores are not perfectly round & this will not allow the rings a perfect seal & the oil is getting past & mixing with the combustion charge & blowing out with the exhaust. It's also possible that some of the valve stem seals could have failed again, the oil is running down the stems, into the intake charge & again blowing out the exhaust. 2 qts in 3,000 miles is probably not going to be enough for you to see the blue smoke out the exhaust, but you could pull the spark plugs & see if there is any carbon residue on them because this would indicate too much oil getting into the cylinders.
    How many miles since the repair was done? Were these repairs done at 50K when the oil burning started, or were the rings & valve stem seals just done recently? If the rings were only done recently, then they might not have had time to seat yet.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


  5. #5

    Default

    Like a few other people said it could be bad valve guide seals something in that area. Try running a thicker oil in it and see if it makes a difference. 2qrts. is a lot for that much mileage. Try doing a compression test and see if your making the right amount of compression. I don't know to much about the 5.3's but check those and see what you get.

    Good luck
    1995 C1500 4.3L 2WD. JET TBI Spacer, JET stage 1 chip, 10mm Taylor custom wires, Pulstar Iridium Pulse Plugs.
    260k miles and still going strong...

  6. #6

    Default

    Welcome to the club. Hope you get your truck fixed right.

  7. #7
    Legend
    murdog94's Avatar
    Join Date
    Feb 2008
    Location
    Cloquet, Minnesota, United States
    Posts
    8,198
    Blog Entries
    12

    Default

    Thread moved here
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

Similar Threads

  1. New member - 1994 K1500 burnin' oil bad
    By snakebone in forum GM Powertrain
    Replies: 7
    Last Post: 12-03-2007, 08:00 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •